161 results on '"Tsuneo Ono"'
Search Results
2. Development of a high-resolution marine ecosystem model for predicting the combined impacts of ocean acidification and deoxygenation
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Lawrence Patrick C. Bernardo, Masahiko Fujii, and Tsuneo Ono
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ocean acidification ,ocean warming ,deoxygenation ,ocean biogeochemical model ,mitigation ,adaptation ,Science ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
An approach was developed to help evaluate and predict the combined effects of ocean acidification and deoxygenation on calcifying organisms along the coast of Japan. The Coastal and Regional Ocean COmmunity (CROCO) modeling system was set up to couple the Regional Ocean Modeling System (ROMS) to the Pelagic Interaction Scheme for Carbon and Ecosystem Studies (PISCES) biogeochemical model and used to reproduce physical and biochemical processes in the area around Miyako Bay, Iwate Prefecture, Japan. Future scenario cases were also set up, which used initial and boundary conditions based on Future Ocean Regional Projection (FORP) simulations. Present day simulations were able to reproduce the general features of observed physical and biochemical parameters, except for some rapid decreases in salinity, pH and aragonite saturation state (Ωarag). This suggests that more local factors which have not been introduced into the model, such as submarine groundwater discharge, may be involved, or that river inputs may be underestimated. Results of the future projections suggest a significant impact of global warming and ocean acidification on calcifying organisms for the worst case of climate change under the Representative Concentration Pathway (RCP) 8.5 scenario. In particular, it is feared that values of Ωarag would approach the critical level for calcifying organisms (Ωarag< 1.1) throughout the year, under which decreased larval shell lengths and malformation have been observed experimentally for the locally grown Haliotis discus hannai (Ezo Abalone) species. However, these findings may not be true for a different coastal locality, and this study highlights and continues to stress the importance of developing model setups capable of incorporating both regional and local factors affecting ocean acidification and deoxygenation.
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- 2023
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3. Long-term safety and efficacy of alogliptin, a DPP-4 inhibitor, in patients with type 2 diabetes: a 3-year prospective, controlled, observational study (J-BRAND Registry)
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Masakazu Kobayashi, Hirohito Sone, Haruhiko Osawa, Daisuke Koya, Takanori Miura, Yoshihito Atsumi, Udai Nakamura, Eiichi Araki, Hitoshi Shimano, Yukio Tanizawa, Jiro Nakamura, Yuichiro Yamada, Nobuya Inagaki, Atsuko Abiko, Hideki Katagiri, Michio Hayashi, Keiko Naruse, Shimpei Fujimoto, Masazumi Fujiwara, Kenichi Shikata, Yosuke Okada, Tsutomu Yamazaki, Sou Nagai, Katsuyuki Yanagisawa, Hiromichi Kijima, Shinji Taneda, Shigeyuki Saitoh, Daisuke Ikeda, Fuminori Hirano, Haruhiko Yoshimura, Mitsutaka Inoue, Masahiko Katoh, Osamu Nakagaki, Chiho Yamamoto, Akitsuki Morikawa, Shin Furukawa, Takeshi Koshiya, Hajime Sugawara, Takumi Uchida, Noe Takakubo, Yasushi Ishigaki, Susumu Suzuki, Takashi Shimotomai, Naoki Tamasawa, Jun Matsui, Takashi Goto, Toshihide Oizumi, Shinji Susa, Makoto Daimon, Hiroshi Murakami, Takashi Sugawara, Hiroaki Akai, Mari Nakamura, Yoshiji Ogawa, Takao Yokoshima, Tsuyoshi Watanabe, Michio Shimabukuro, Kazuhisa Tsukamoto, Motoei Kunimi, Jo Satoh, Atushi Okuyama, Kazutaka Ogawa, Hideyuki Eguchi, Mamoru Kimura, Hiroshi Kouno, Yohei Horikawa, Shin Ikejima, Masaru Saitoh, Naoyoshi Minami, Akihiro Sekikawa, Toyoyoshi Uchida, Toshihide Kawai, Nobuya Fujita, Ken Tomotsune, Shigeo Yamashita, Motoji Naka, Toru Hiyoshi, Tomotaka Katoh, Kumiko Hamano, Kouichi Inukai, Takuma Kondo, Kazuhiro Tsumura, Yoko Matsuzawa, Masahiro Mimura, Masahiko Kawasumi, Izumi Takei, Masafumi Matsuda, Ichiro Tatsuno, Nobuyuki Banba, Akihiko Ando, Masao Toyoda, Daisuke Suzuki, Takahiro Iijima, Yasumichi Mori, Yutaka Uehara, Yoshihiko Satoh, Kazuaki Yahata, Yoshimasa Asoh, Koichiro Kuwabara, Souichi Takizawa, Yasushi Tanaka, Koutaroh Yokote, Masako Tohgo, Takanobu Itoi, Shigeru Miyazaki, Hiroshi Itoh, Teruo Shiba, Takahisa Hirose, Mariko Higa, Masanobu Yamada, Osamu Ogawa, Masatoshi Kuroki, Shinobu Satoh, Makoto Ujihara, Kenjiroh Yamanaka, Hajime Koyano, Tadashi Yamakawa, Kenichiroh Takahashi, Kazuki Orime, Tsutomu Hirano, Jiroh Morimoto, Takashi Itoh, Yuzoh Mizuno, Naoyuki Yamamoto, Han Miyatake, Mina Yamaguchi, Kenji Yamane, Masahiko Kure, Satoko Kawabe, Masahumi Kakei, Masashi Yoshida, Hiroyuki Itoh, Nobuaki Minami, Kazuki Kobayashi, Yusuke Fujino, Makoto Shibuya, Midori Hosokawa, Isao Nozaki, Chigure Nawa, Tamio Ieiri, Takayuki Watanabe, Yoshio Katoh, Takuyuki Katabami, Michiko Handa, Issei Shimada, Kenichi Ohya, Yoshihiro Ogawa, Takanobu Yoshimoto, Jiroh Nakamura, Naotsuka Okayama, Kenro Imaeda, Syuko Yoshioka, Masako Murakami, Takashi Murase, Yoshihiko Yamada, Yutaka Yano, Hiromitsu Sasaki, Yasuhiro Sumida, Osamu Yonaha, Hiroshi Sobajima, Mitsuyasu Ito, Atushi Suzuki, Atsuko Ishikawa, Takehiko Ichikawa, Shogo Asano, Shinobu Goto, Sakuma Hiroya, Hiroshi Murase, Shozo Ogawa, Hideki Okamoto, Kotaro Nagai, Koji Nagayama, Masanori Yoshida, Norio Takahashi, Kazuhisa Takami, Tsuneo Ono, Takanobu Morihiro, Daisuke Tanaka, Noriko Takahara, Satoshi Miyata, Mamiko Tsugawa, Koichiro Yasuda, Seiji Muro, Masanori Emoto, Ikuo Mineo, Ichiro Shiojima, Takeshi Kurose, Makoto Ohashi, Yumiko Kawabata, Mitsushige Nishikawa, Emiko Nomura, Yasuyuki Nishimura, Yasuhiro Ono, Yasuhisa Yamamoto, Keigo Naka, Taizo Yamamoto, Rika Usuda, Hiroshi Akahori, Seika Kato, Hiroyuki Konya, Yutaka Umayahara, Takashi Seta, Hideki Taki, Masashi Sekiya, Shinichi Mogami, Sumie Fujii, Toshiyuki Hibuse, Shingo Tsuji, Hirofumi Sumi, Yasuro Kumeda, Akinori Kogure, Kenji Furukawa, Akira Kuroe, Hideaki Sawaki, Narihiro Hibiki, Yoshihiro Kitagawa, Yukihiro Bando, Akira Ono, Rikako Uenaka, Seitaro Omoto, Yuki Kita, Eiko Ri, Ryutaro Numaguchi, Sachiko Kawashima, Ichiro Kisimoto, Kiminori Hosoda, Yoshihiko Araki, Tetsuroh Arimura, Mitsuru Hashiramoto, Koumei Takeda, Akira Matsutani, Yasushi Inoue, Fumio Sawano, Nozomu Kamei, Yasuo Ito, Miwa Morita, Yoshiaki Oda, Rui Kishimoto, Katsuhiro Hatao, Tomoatsu Mune, Fumiko Kawasaki, Hiroki Teragawa, Ken Yaga, Keita Ishii, Kyouji Hirata, Tatsuaki Nakatou, Yutaka Nitta, Naoki Fujita, Masayasu Yoneda, Masatoshi Tsuru, Shinichirou Ando, Toshiaki Kakiba, Michihiro Toyoshige, Tsuguka Shiwa, Hiroaki Miyaoka, Yasumi Shintani, Takenori Sakai, Tetsuji Niiya, Shinpei Fujimoto, Hisaka Minami, Yoshihiko Noma, Masaaki Tamaru, Yoshitaka Sayou, Tomoyo Oyama, Masamoto Torisu, Yuichi Fujinaka, Yoshitaka Kumon, Shozo Miyauchi, Morikazu Onji, Toru Nakamura, Yousuke Okada, Toshihiko Yanase, Kenro Nishida, Syuji Nakamura, Kunihisa Kobayashi, Nobuhiko Wada, Moritake Higa, Koji Matsushita, Yoshihiko Nishio, Ryoji Fujimoto, Yasuyuki Kihara, Shinichiro Mine, Tadashi Arao, Hiromi Tasaki, Yasuto Matsuo, Hirofumi Matsuda, Kohei Uriu, Kazuko Kanda, Kazuo Ibaraki, Yoshio Kaku, Yasuhiro Takaki, Iwaho Hazekawa, Kenji Ebihara, Eiichiro Watanabe, Iku Sakurada, Kazuhisa Muraishi, Tamami Oshige, Junichi Yasuda, Toyoshi Iguchi, Noriyuki Sonoda, Masahiro Adachi, Isao Ichino, Yuko Horiuchi, Souichi Uekihara, Shingo Morimitsu, Mitsuhiro Nakazawa, Tadashi Seguchi, and Kengo Kaneko
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Diseases of the endocrine glands. Clinical endocrinology ,RC648-665 - Abstract
Introduction Given an increasing use of dipeptidyl peptidase-4 (DPP-4) inhibitors to treat patients with type 2 diabetes mellitus in the real-world setting, we conducted a prospective observational study (Japan-based Clinical Research Network for Diabetes Registry: J-BRAND Registry) to elucidate the safety and efficacy profile of long-term usage of alogliptin.Research design and methods We registered 5969 patients from April 2012 through September 2014, who started receiving alogliptin (group A) or other classes of oral hypoglycemic agents (OHAs; group B), and were followed for 3 years at 239 sites nationwide. Safety was the primary outcome. Symptomatic hypoglycemia, pancreatitis, skin disorders of non-extrinsic origin, severe infections, and cancer were collected as major adverse events (AEs). Efficacy assessment was the secondary outcome and included changes in hemoglobin A1c (HbA1c), fasting blood glucose, fasting insulin and urinary albumin.Results Of the registered, 5150 (group A: 3395 and group B: 1755) and 5096 (3358 and 1738) were included for safety and efficacy analysis, respectively. Group A patients mostly (>90%) continued to use alogliptin. In group B, biguanides were the primary agents, while DPP-4 inhibitors were added in up to ~36% of patients. The overall incidence of AEs was similar between the two groups (42.7% vs 42.2%). Kaplan-Meier analysis revealed the incidence of cancer was significantly higher in group A than in group B (7.4% vs 4.8%, p=0.040), while no significant incidence difference was observed in the individual cancer. Multivariate Cox regression analysis revealed that the imbalanced patient distribution (more elderly patients in group A than in group B), but not alogliptin usage per se, contributed to cancer development. The incidence of other major AE categories was with no between-group difference. Between-group difference was not detected, either, in the incidence of microvascular and macrovascular complications. HbA1c and fasting glucose decreased significantly at the 0.5-year visit and nearly plateaued thereafter in both groups.Conclusions Alogliptin as a representative of DPP-4 inhibitors was safe and durably efficacious when used alone or with other OHAs for patients with type 2 diabetes in the real world setting.
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- 2021
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4. Continuous Monitoring and Future Projection of Ocean Warming, Acidification, and Deoxygenation on the Subarctic Coast of Hokkaido, Japan
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Masahiko Fujii, Shintaro Takao, Takuto Yamaka, Tomoo Akamatsu, Yamato Fujita, Masahide Wakita, Akitomo Yamamoto, and Tsuneo Ono
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ocean acidification ,deoxygenation ,subarctic ,coast ,monitoring ,future projection ,Science ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
As the ocean absorbs excessive anthropogenic CO2 and ocean acidification proceeds, it is thought to be harder for marine calcifying organisms, such as shellfish, to form their skeletons and shells made of calcium carbonate. Recent studies have suggested that various marine organisms, both calcifiers and non-calcifiers, will be affected adversely by ocean warming and deoxygenation. However, regardless of their effects on calcifiers, the spatiotemporal variability of parameters affecting ocean acidification and deoxygenation has not been elucidated in the subarctic coasts of Japan. This study conducted the first continuous monitoring and future projection of physical and biogeochemical parameters of the subarctic coast of Hokkaido, Japan. Our results show that the seasonal change in biogeochemical parameters, with higher pH and dissolved oxygen (DO) concentration in winter than in summer, was primarily regulated by water temperature. The daily fluctuations, which were higher in the daytime than at night, were mainly affected by daytime photosynthesis by primary producers and respiration by marine organisms at night. Our projected results suggest that, without ambitious commitment to reducing CO2 and other greenhouse gas emissions, such as by following the Paris Agreement, the impact of ocean warming and acidification on calcifiers along subarctic coasts will become serious, exceeding the critical level of high temperature for 3 months in summer and being close to the critical level of low saturation state of calcium carbonate for 2 months in mid-winter, respectively, by the end of this century. The impact of deoxygenation might often be prominent assuming that the daily fluctuation in DO concentration in the future is similar to that at present. The results also suggest the importance of adaptation strategies by local coastal industries, especially fisheries, such as modifying aquaculture styles.
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- 2021
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5. Perspectives on in situ Sensors for Ocean Acidification Research
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Akash R. Sastri, James R. Christian, Eric P. Achterberg, Dariia Atamanchuk, Justin J. H. Buck, Philip Bresnahan, Patrick J. Duke, Wiley Evans, Stephen F. Gonski, Bruce Johnson, S. Kim Juniper, Steve Mihaly, Lisa A. Miller, Mike Morley, Dave Murphy, Shin-ichiro Nakaoka, Tsuneo Ono, George Parker, Kyle Simpson, and Tomohiko Tsunoda
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ocean acidification ,sensor ,best practices ,data quality ,carbonate system ,Science ,General. Including nature conservation, geographical distribution ,QH1-199.5 - Abstract
As ocean acidification (OA) sensor technology develops and improves, in situ deployment of such sensors is becoming more widespread. However, the scientific value of these data depends on the development and application of best practices for calibration, validation, and quality assurance as well as on further development and optimization of the measurement technologies themselves. Here, we summarize the results of a 2-day workshop on OA sensor best practices held in February 2018, in Victoria, British Columbia, Canada, drawing on the collective experience and perspectives of the participants. The workshop on in situ Sensors for OA Research was organized around three basic questions: 1) What are the factors limiting the precision, accuracy and reliability of sensor data? 2) What can we do to facilitate the quality assurance/quality control (QA/QC) process and optimize the utility of these data? and 3) What sort of data or metadata are needed for these data to be most useful to future users? A synthesis of the discussion of these questions among workshop participants and conclusions drawn is presented in this paper.
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- 2019
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6. Supplementary material to 'Short-term variation of pH in seawaters around coastal areas of Japan: Characteristics and forcings'
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Tsuneo Ono, Daisuke Muraoka, Masahiro Hayashi, Makiko Yorifuji, Akihiro Dazai, Shigeyuki Omoto, Takehiro Tanaka, Tomohiro Okamura, Goh Onitsuka, Kenji Sudo, Masahiko Fujii, Ryuji Hamanoue, and Masahide Wakita
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- 2023
7. Short-term variation of pH in seawaters around coastal areas of Japan: Characteristics and forcings
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Tsuneo Ono, Daisuke Muraoka, Masahiro Hayashi, Makiko Yorifuji, Akihiro Dazai, Shigeyuki Omoto, Takehiro Tanaka, Tomohiro Okamura, Goh Onitsuka, Kenji Sudo, Masahiko Fujii, Ryuji Hamanoue, and Masahide Wakita
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The pH of coastal seawater varies based on several local forcings, such as water circulation, terrestrial inputs, and biological processes, and these forcings can change along with global climate change. Understanding the mechanism of pH variation in each coastal area is thus important for a realistic future projection that considers changes in these forcings. From 2020 to 2021, we performed parallel year-round observations of pH and related ocean parameters at five stations around the Japanese coast (Miyako Bay, Shizugawa Bay, Kashiwazaki Coast, Hinase Archipelago, and Ohno Strait) to understand the characteristics of short-term pH variations and their forcings. Annual variability (~1 standard deviation) of pH and aragonite saturation state (Ωara) were 0.05–0.09 and 0.25–0.29, respectively, for three areas with low anthropogenic loadings (Miyako Bay, Kashiwazaki Coast, and Shizugawa Bay), while it increased to 0.16–0.21 and 0.52–0.58, respectively, in two areas with medium anthropogenic loadings (Hinase Archipelago and Ohno Strait in Seto Inland Sea). Statistical assessment of temporal variability at various timescales revealed that most of the annual variabilities in both pH and Ωara were derived by short-term variation at a timescale of < 10 days, rather than seasonal-scale variation. Our analyses further illustrated that most of the short-term pH variation was caused by biological processes, while both thermodynamic and biological processes equally contributed to the temporal variation in Ωara. The observed results showed that short-term acidification with Ωara < 1.5 occurred occasionally in Miyako and Shizugawa Bays, while it occurred frequently in the Hinase Archipelago and Ohno Strait. Most of such short-term acidified events were related to short-term low-salinity events. Our analyses showed that the amplitude of short-term pH variation was linearly correlated with that of short-term salinity variation, and its regression coefficient at the time of high freshwater input was positively correlated with the nutrient concentration of the main river that flows into the coastal area.
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- 2023
8. Global Carbon Budget 2019
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Pierre Friedlingstein, Matthew W. Jones, Michael O'Sullivan, Robbie M. Andrew, Judith Hauck, Glen P. Peters, Wouter Peters, Julia Pongratz, Stephen Sitch, Corinne Le Quéré, Dorothee C. E. Bakker, Josep G. Canadell, Philippe Ciais, Robert B. Jackson, Peter Anthoni, Leticia Barbero, Ana Bastos, Vladislav Bastrikov, Meike Becker, Laurent Bopp, Erik Buitenhuis, Naveen Chandra, Frédéric Chevallier, Louise P. Chini, Kim I. Currie, Richard A. Feely, Marion Gehlen, Dennis Gilfillan, Thanos Gkritzalis, Daniel S. Goll, Nicolas Gruber, Sören Gutekunst, Ian Harris, Vanessa Haverd, Richard A. Houghton, George Hurtt, Tatiana Ilyina, Atul K. Jain, Emilie Joetzjer, Jed O. Kaplan, Etsushi Kato, Kees Klein Goldewijk, Jan Ivar Korsbakken, Peter Landschützer, Siv K. Lauvset, Nathalie Lefèvre, Andrew Lenton, Sebastian Lienert, Danica Lombardozzi, Gregg Marland, Patrick C. McGuire, Joe R. Melton, Nicolas Metzl, David R. Munro, Julia E. M. S. Nabel, Shin-Ichiro Nakaoka, Craig Neill, Abdirahman M. Omar, Tsuneo Ono, Anna Peregon, Denis Pierrot, Benjamin Poulter, Gregor Rehder, Laure Resplandy, Eddy Robertson, Christian Rödenbeck, Roland Séférian, Jörg Schwinger, Naomi Smith, Pieter P. Tans, Hanqin Tian, Bronte Tilbrook, Francesco N. Tubiello, Guido R. van der Werf, Andrew J. Wiltshire, and Sönke Zaehle
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Earth Resources And Remote Sensing - Abstract
Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere – the “global carbon budget” – is important to better understand the global carbon cycle, support the development of climate policies, and project future climate change. Here we describe data sets and methodology to quantify the five major components of the global carbon budget and their uncertainties. Fossil CO2 emissions (E(FF)) are based on energy statistics and cement production data, while emissions from land use change (E(LUC)), mainly deforestation, are based on land use and land use change data and bookkeeping models. Atmospheric CO2 concentration is measured directly and its growth rate (G(ATM)) is computed from the annual changes in concentration. The ocean CO2 sink (S(OCEAN)) and terrestrial CO2 sink (S(LAND)) are estimated with global process models constrained by observations. The resulting carbon budget imbalance (B(IM)), the difference between the estimated total emissions and the estimated changes in the atmosphere, ocean, and terrestrial biosphere, is a measure of imperfect data and understanding of the contemporary carbon cycle. All uncertainties are reported as ±1σ. For the last decade available (2009–2018), E(FF) was 9.5±0.5 GtC/yr, E(LUC) 1.5±0.7 GtC/yr, G(ATM) 4.9±0.02 GtC/yr (2.3±0.01 ppm/yr), S(OCEAN) 2.5±0.6 GtC/yr, and S(LAND) 3.2±0.6 GtC/yr, with a budget imbalance B(IM) of 0.4 GtC/yr indicating overestimated emissions and/or underestimated sinks. For the year 2018 alone, the growth in E(FF) was about 2.1 % and fossil emissions increased to 10.0±0.5 GtC/yr, reaching 10 GtC/yr for the first time in history, E(LUC) was 1.5±0.7 GtC/yr, for total anthropogenic CO2 emissions of 11.5±0.9 GtC/yr (42.5±3.3 GtCO2). Also for 2018, G(ATM) was 5.1±0.2 GtC/yr (2.4±0.1 ppm/yr), S(OCEAN) was 2.6±0.6 GtC/yr, and S(LAND) was 3.5±0.7 GtC/yr, with a B(IM) of 0.3 GtC. The global atmospheric CO2 concentration reached 407.38±0.1 ppm averaged over 2018. For 2019, preliminary data for the first 6–10 months indicate a reduced growth in E(FF) of +0.6 % (range of −0.2 % to 1.5 %) based on national emissions projections for China, the USA, the EU, and India and projections of gross domestic product corrected for recent changes in the carbon intensity of the economy for the rest of the world. Overall, the mean and trend in the five components of the global carbon budget are consistently estimated over the period 1959–2018, but discrepancies of up to 1 GtC/yr persist for the representation of semi-decadal variability in CO2 fluxes. A detailed comparison among individual estimates and the introduction of a broad range of observations shows (1) no consensus in the mean and trend in land use change emissions over the last decade, (2) a persistent low agreement between the different methods on the magnitude of the land CO2 flux in the northern extra-tropics, and (3) an apparent underestimation of the CO2 variability by ocean models outside the tropics. This living data update documents changes in the methods and data sets used in this new global carbon budget and the progress in understanding of the global carbon cycle compared with previous publications of this data set (Le Quéré et al., 2018a, b, 2016, 2015a, b, 2014, 2013).
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- 2019
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9. Global distribution and variability of subsurface chlorophyll a concentrations
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Sayaka Yasunaka, Tsuneo Ono, Kosei Sasaoka, and Kanako Sato
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Chlorophyll a (Chl a) often exhibits a maximum concentration in the subsurface layer rather that at the surface. The depth of the Chl a maximum primarily depends on the balance between light penetration from the surface and the nutrient supply from the deep ocean. However, a global map of subsurface Chl a concentrations based on observations has not been presented yet. In this study, we integrate Chl a concentration data from recent biogeochemical floats and historical ship-based (and other) observations and present global maps of subsurface Chl a concentrations with related variables. The subsurface Chl a maximum was observed globally throughout the oceans: at depths greater than 80 m in the subtropics and tropics (30∘ S to 30∘ N); in the 40–80 m depth range in the tropics, in the Southern Ocean (south of 40∘ S), and at the midlatitudes (30–40∘ N/S) in the North Pacific; and at depths of less than 40 m in the northern subarctic (north of 40∘ N). The observed maxima all lie below the mixed-layer depth for the entire year in the subtropics and tropics and during summer in the midlatitudes and the northern subarctic. The depths of the subsurface Chl a maxima are greater than those of the photosynthetically active layer in the subtropics but shallower in the tropics and midlatitudes. In the subtropics, a seasonal increase in oxygen below the mixed layer implies substantial new biological production, which corresponds to 10 % of the net primary production in that region. During El Niño, subsurface Chl a concentrations are higher in the middle and eastern equatorial Pacific but lower to the west in comparison with La Niña, a pattern which is opposite to that on the surface. The spatiotemporal variability of the Chl a concentrations described here has implications to not only for the biogeochemical cycling in the ocean but also for understanding the thermal structure and dynamics of the ocean via absorption of shortwave radiation.
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- 2022
10. Observed and projected impacts of coastal warming, acidification, and deoxygenation on Pacific oyster (Crassostrea gigas) farming: A case study in the Hinase Area, Okayama Prefecture and Shizugawa Bay, Miyagi Prefecture, Japan
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Masahiko Fujii, Ryuji Hamanoue, Lawrence Patrick Cases Bernardo, Tsuneo Ono, Akihiro Dazai, Shigeyuki Oomoto, Masahide Wakita, and Takehiro Tanaka
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Coastal warming, acidification, and deoxygenation are progressing, primarily due to the increase in anthropogenic CO2. Coastal acidification has been reported to have effects that are expected to become more severe as acidification progresses, including inhibiting formation of the shells of calcifying organisms such as shellfish. However, compared to water temperature, an indicator of coastal warming, spatiotemporal variations in acidification and deoxygenation indicators such as pH, aragonite saturation state (Ωarag), and dissolved oxygen in coastal areas of Japan have not been observed and projected. Moreover, many species of shellfish are important fisheries resources, including Pacific oyster (Crassostrea gigas). Therefore, there is concern regarding the future combined impacts of coastal warming, acidification, and deoxygenation on Pacific oyster farming, necessitating evaluation of current and future impacts to facilitate mitigation measures. We deployed continuous monitoring systems for coastal warming, acidification, and deoxygenation in the Hinase area of Okayama Prefecture and Shizugawa Bay in Miyagi Prefecture, Japan. In Hinase, the Ωarag value was often lower than the critical level of acidification for Pacific oyster larvae, although no impact of acidification on larvae was identified by microscopy examination. Oyster larvae are anticipated to be affected more seriously by the combined impacts of coastal warming and acidification, with lower pH and Ωarag values and a prolonged spawning period, which may shorten the oyster shipping period and lower the quality of oysters. No significant future impact of surface-water deoxygenation on Pacific oysters was identified. To minimize the impacts of coastal warming and acidification on Pacific oyster and related local industries, cutting CO2 emissions is mandatory, but adaptation measures such as regulation of freshwater and organic matter inflow from rivers and changes in the form of oyster farming practiced locally might also be required.
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- 2022
11. Supplementary material to 'Global Carbon Budget 2022'
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Pierre Friedlingstein, Michael O'Sullivan, Matthew W. Jones, Robbie M. Andrew, Luke Gregor, Judith Hauck, Corinne Le Quéré, Ingrid T. Luijkx, Are Olsen, Glen P. Peters, Wouter Peters, Julia Pongratz, Clemens Schwingshackl, Stephen Sitch, Josep G. Canadell, Philippe Ciais, Robert B. Jackson, Simone R. Alin, Ramdane Alkama, Almut Arneth, Vivek K. Arora, Nicholas R. Bates, Meike Becker, Nicolas Bellouin, Henry C. Bittig, Laurent Bopp, Frédéric Chevallier, Louise P. Chini, Margot Cronin, Wiley Evans, Stefanie Falk, Richard A. Feely, Thomas Gasser, Marion Gehlen, Thanos Gkritzalis, Lucas Gloege, Giacomo Grassi, Nicolas Gruber, Özgür Gürses, Ian Harris, Matthew Hefner, Richard A. Houghton, George C. Hurtt, Yosuke Iida, Tatiana Ilyina, Atul K. Jain, Annika Jersild, Koji Kadono, Etsushi Kato, Daniel Kennedy, Kees Klein Goldewijk, Jürgen Knauer, Jan Ivar Korsbakken, Peter Landschützer, Nathalie Lefèvre, Keith Lindsay, Junjie Liu, Zhu Liu, Gregg Marland, Nicolas Mayot, Matthew J. McGrath, Nicolas Metzl, Natalie M. Monacci, David R. Munro, Shin-Ichiro Nakaoka, Yosuke Niwa, Kevin O'Brien, Tsuneo Ono, Paul I. Palmer, Naiqing Pan, Denis Pierrot, Katie Pocock, Benjamin Poulter, Laure Resplandy, Eddy Robertson, Christian Rödenbeck, Carmen Rodriguez, Thais M. Rosan, Jörg Schwinger, Roland Séférian, Jamie D. Shutler, Ingunn Skjelvan, Tobias Steinhoff, Qing Sun, Adrienne J. Sutton, Colm Sweeney, Shintaro Takao, Toste Tanhua, Pieter P. Tans, Xiangjun Tian, Hanqin Tian, Bronte Tilbrook, Hiroyuki Tsujino, Francesco Tubiello, Guido van der Werf, Anthony P. Walker, Rik Wanninkhof, Chris Whitehead, Anna Willstrand Wranne, Rebecca Wright, Wenping Yuan, Chao Yue, Xu Yue, Sönke Zaehle, Jiye Zeng, and Bo Zheng
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- 2022
12. Global Carbon Budget 2022
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Pierre Friedlingstein, Michael O'Sullivan, Matthew W. Jones, Robbie M. Andrew, Luke Gregor, Judith Hauck, Corinne Le Quéré, Ingrid T. Luijkx, Are Olsen, Glen P. Peters, Wouter Peters, Julia Pongratz, Clemens Schwingshackl, Stephen Sitch, Josep G. Canadell, Philippe Ciais, Robert B. Jackson, Simone R. Alin, Ramdane Alkama, Almut Arneth, Vivek K. Arora, Nicholas R. Bates, Meike Becker, Nicolas Bellouin, Henry C. Bittig, Laurent Bopp, Frédéric Chevallier, Louise P. Chini, Margot Cronin, Wiley Evans, Stefanie Falk, Richard A. Feely, Thomas Gasser, Marion Gehlen, Thanos Gkritzalis, Lucas Gloege, Giacomo Grassi, Nicolas Gruber, Özgür Gürses, Ian Harris, Matthew Hefner, Richard A. Houghton, George C. Hurtt, Yosuke Iida, Tatiana Ilyina, Atul K. Jain, Annika Jersild, Koji Kadono, Etsushi Kato, Daniel Kennedy, Kees Klein Goldewijk, Jürgen Knauer, Jan Ivar Korsbakken, Peter Landschützer, Nathalie Lefèvre, Keith Lindsay, Junjie Liu, Zhu Liu, Gregg Marland, Nicolas Mayot, Matthew J. McGrath, Nicolas Metzl, Natalie M. Monacci, David R. Munro, Shin-Ichiro Nakaoka, Yosuke Niwa, Kevin O'Brien, Tsuneo Ono, Paul I. Palmer, Naiqing Pan, Denis Pierrot, Katie Pocock, Benjamin Poulter, Laure Resplandy, Eddy Robertson, Christian Rödenbeck, Carmen Rodriguez, Thais M. Rosan, Jörg Schwinger, Roland Séférian, Jamie D. Shutler, Ingunn Skjelvan, Tobias Steinhoff, Qing Sun, Adrienne J. Sutton, Colm Sweeney, Shintaro Takao, Toste Tanhua, Pieter P. Tans, Xiangjun Tian, Hanqin Tian, Bronte Tilbrook, Hiroyuki Tsujino, Francesco Tubiello, Guido van der Werf, Anthony P. Walker, Rik Wanninkhof, Chris Whitehead, Anna Willstrand Wranne, Rebecca Wright, Wenping Yuan, Chao Yue, Xu Yue, Sönke Zaehle, Jiye Zeng, and Bo Zheng
- Abstract
Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere in a changing climate is critical to better understand the global carbon cycle, support the development of climate policies, and project future climate change. Here we describe and synthesise data sets and methodology to quantify the five major components of the global carbon budget and their uncertainties. Fossil CO2 emissions (EFOS) are based on energy statistics and cement production data, while emissions from land-use change (ELUC), mainly deforestation, are based on land-use and land-use change data and bookkeeping models. Atmospheric CO2 concentration is measured directly, and its growth rate (GATM) is computed from the annual changes in concentration. The ocean CO2 sink (SOCEAN) is estimated with global ocean biogeochemistry models and observation-based data-products. The terrestrial CO2 sink (SLAND) is estimated with dynamic global vegetation models. The resulting carbon budget imbalance (BIM), the difference between the estimated total emissions and the estimated changes in the atmosphere, ocean, and terrestrial biosphere, is a measure of imperfect data and understanding of the contemporary carbon cycle. All uncertainties are reported as ±1σ. For the year 2021, EFOS increased by 5.1 % relative to 2020, with fossil emissions at 10.1 ± 0.5 GtC yr-1 (9.9 ± 0.5 GtC yr-1 when the cement carbonation sink is included), ELUC was 1.1 ± 0.7 GtC yr-1, for a total anthropogenic CO2 emission of 11.1 ± 0.8 GtC yr-1 (40.8 ± 2.9 GtCO2). Also, for 2021, GATM was 5.2 ± 0.2 GtC yr-1 (2.5 ± 0.1 ppm yr-1), SOCEAN was 2.9 ± 0.4 GtC yr-1 and SLAND was 3.5 ± 0.9 GtC yr-1, with a BIM of -0.6 GtC yr-1 (i.e. total estimated sources too low or sinks too high). The global atmospheric CO2 concentration averaged over 2021 reached 414.71 ± 0.1 ppm. Preliminary data for 2022, suggest an increase in EFOS relative to 2021 of +1.1 % (0 % to 1.7 %) globally, and atmospheric CO2 concentration reaching 417.3 ppm, more than 50 % above pre-industrial level. Overall, the mean and trend in the components of the global carbon budget are consistently estimated over the period 1959–2021, but discrepancies of up to 1 GtC yr-1 persist for the representation of annual to semi-decadal variability in CO2 fluxes. Comparison of estimates from multiple approaches and observations shows: (1) a persistent large uncertainty in the estimate of land-use changes emissions, (2) a low agreement between the different methods on the magnitude of the land CO2 flux in the northern extra-tropics, and (3) a discrepancy between the different methods on the strength of the ocean sink over the last decade. This living data update documents changes in the methods and data sets used in this new global carbon budget and the progress in understanding of the global carbon cycle compared with previous publications of this data set (Friedlingstein et al., 2022a; Friedlingstein et al., 2020; Friedlingstein et al., 2019; Le Quéré et al., 2018b, 2018a, 2016, 2015b, 2015a, 2014, 2013). The data presented in this work are available at https://doi.org/10.18160/GCP-2022 (Friedlingstein et al., 2022b).
- Published
- 2022
13. Long-term trends of oxygen concentration in the waters in bank and shelves of the Southern Japan Sea
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Tsuneo Ono
- Subjects
0106 biological sciences ,geography ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,Continental shelf ,010604 marine biology & hydrobiology ,chemistry.chemical_element ,Oceanography ,01 natural sciences ,Oxygen ,Summer season ,Water column ,chemistry ,Environmental science ,Limiting oxygen concentration ,Deoxygenation ,Bay ,0105 earth and related environmental sciences ,China sea - Abstract
While multiple studies have investigated oxygen decrease in Japan Sea Proper Water (JSPW; > 300 m in depth), oxygen variation in continental slope and shelf waters (−1) by the end of this century.
- Published
- 2021
14. Current situation and future perspective for environmental standards of seawater: commencing with Certified Reference Materials (CRMs) for nutrients of distributing nutrients
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Masahiko Murata, Michio Aoyama, Chikako Cheong, Tsutomu Miura, Takeshi Fujii, Hitoshi Mitsuda, Takashi Kitao, Daisuke Sasano, Toshiya Nakano, Naoki Nagai, Taketoshi Kodama, Hiromi Kasai, Yoko Kiyomoto, Takashi Setou, Tsuneo Ono, Shinichiro Yokogawa, Yasuhiro Arii, Tomomi Sone, Yoshiko Ishikawa, Takeshi Yoshimura, Hiroshi Uchida, Tatsuya Tanaka, Yohei Kayukawa, and Masahide Wakita
- Published
- 2020
15. Long-term trends in pH in Japanese coastal seawater
- Author
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Tsuneo Ono, Miho Ishizu, Yasumasa Miyazawa, and Tomohiko Tsunoda
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010504 meteorology & atmospheric sciences ,Similar distribution ,lcsh:QE1-996.5 ,lcsh:Life ,chemistry.chemical_element ,Pelagic zone ,010501 environmental sciences ,01 natural sciences ,lcsh:Geology ,lcsh:QH501-531 ,chemistry ,lcsh:QH540-549.5 ,Environmental chemistry ,Dissolved organic carbon ,Environmental science ,Seawater ,lcsh:Ecology ,Water quality ,Water pollution ,Subsurface flow ,Carbon ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences ,Earth-Surface Processes - Abstract
In recent decades, acidification of the open ocean has shown a consistent increase. However, analysis of long-term data in coastal seawater shows that the pH is highly variable because of coastal processes and anthropogenic carbon inputs. It is therefore important to understand how anthropogenic carbon inputs and other natural or anthropogenic factors influence the temporal trends in pH in coastal seawater. Using water quality data collected at 289 monitoring sites as part of the Water Pollution Control Program, we evaluated the long-term trends of the pHinsitu in Japanese coastal seawater at ambient temperature from 1978 to 2009. We found that the annual maximum pHinsitu, which generally represents the pH of surface waters in winter, had decreased at 75 % of the sites but had increased at the remaining sites. The temporal trend in the annual minimum pHinsitu, which generally represents the pH of subsurface water in summer, also showed a similar distribution, although it was relatively difficult to interpret the trends of annual minimum pHinsitu because the sampling depths differed between the stations. The annual maximum pHinsitu decreased at an average rate of −0.0024 yr−1, with relatively large deviations (0.0042 yr−1) from the average value. Detailed analysis suggested that the decrease in pH was caused partly by warming of winter surface waters in Japanese coastal seawater. The pH, when normalized to 25 ∘C, however, showed decreasing trends, suggesting that dissolved inorganic carbon from anthropogenic sources is increasing in Japanese coastal seawater.
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- 2019
16. Supplementary material to 'Global distribution and variability of subsurface chlorophyll a concentration'
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Sayaka Yasunaka, Tsuneo Ono, Kosei Sasaoka, and Kanako Sato
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- 2021
17. Global distribution and variability of subsurface chlorophyll a concentration
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Tsuneo Ono, Kanako Sato, Sayaka Yasunaka, and Kosei Sasaoka
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Biogeochemical cycle ,La Niña ,Mixed layer ,Middle latitudes ,Environmental science ,Photic zone ,Subtropics ,New production ,Atmospheric sciences ,Deep sea - Abstract
Chlorophyll a (Chl-a) often retains its maximum concentration not at the surface but in the subsurface layer. The depth of the Chl-a maximum primarily depends on the balance between light penetration from the surface and nutrient supply from the deep ocean. However, a global map of subsurface Chl-a concentrations based on observations has not been presented yet. In this study, we integrate Chl-a concentration data not only from recent biogeochemical floats but also from historical ship-based and other observations, and present global maps of subsurface Chl-a concentration with related variables. The subsurface Chl-a maximum deeper than the mixed layer depth was stably observed in the subtropics and tropics (30° S to 30° N), only in summer in midlatitudes (30–40° N/S), and rarely at 45–60° S of the Southern Ocean and in the northern North Atlantic (north of 45° N). The depths of the subsurface Chl-a maxima are deeper than those of the euphotic layer in the subtropics and shallower in the tropics and midlatitudes. In the subtropics, seasonal oxygen increases below the mixed layer implied substantial biological new production, which corresponds to 10 % of the net primary production there. During El Niño, the subsurface Chl-a concentration in the equatorial Pacific is higher in the middle to the east and lower in the west than that during La Niña, which is opposite that on the surface. The spatiotemporal variability of the Chl-a concentration described here would be suggestive results not only for the biogeochemical cycle in the ocean but also for the thermal structure and the dynamics of the ocean via the absorption of shortwave radiation.
- Published
- 2021
18. Isoscapes reveal patterns of δ13C and δ15N of pelagic forage fish and squid in the Northwest Pacific Ocean
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Satoshi Suyama, Seiji Ohshimo, Hiroshige Tanaka, Takashi Yamakawa, Daniel J. Madigan, Kaoru Komoto, Taketoshi Kodama, and Tsuneo Ono
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0106 biological sciences ,Squid ,Billfish ,010504 meteorology & atmospheric sciences ,biology ,Isoscapes ,010604 marine biology & hydrobiology ,Ocean current ,Geology ,Pelagic zone ,Aquatic Science ,biology.organism_classification ,01 natural sciences ,Oceanography ,biology.animal ,Forage fish ,Environmental science ,Upwelling ,0105 earth and related environmental sciences ,Trophic level - Abstract
Isoscapes of stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) in pelagic fish and squid were generated using 1967 measured values of forage fish and squid in the Northwest Pacific Ocean. We then used generalized additive models (GAMs) to assess the explanatory variables that best predicted regional fish and squid δ13C and δ15N values. A total of 522 squid and 1445 forage fish were analyzed for δ13C and δ15N. The explanatory variables/variates used in GAM analyses were geographical parameters (longitude and latitude), body mass, season, category of organism (fish or squid), and vertical habitat. The resulting isoscapes of δ13C showed higher values in the sub-tropical region and lower values in the sub-arctic region. The isoscape patterns of δ15N were more complex; higher values were found in both tropical and temperate regions, and lower values were observed in sub-tropical and sub-arctic regions. These heterogeneities in isoscapes of δ13C and δ15N in the Northwest Pacific could be caused by productivity dynamics, ocean currents and upwelling, and the degree of atmospheric fixation of carbon and nitrogen. These new isoscapes can be used in conjunction with predator δ13C and δ15N values to evaluate movements and trophic dynamics of predatory marine animals, including tunas, billfish, sharks, seabirds, and marine mammals, in the Northwestern Pacific Ocean.
- Published
- 2019
19. Long-term safety and efficacy of alogliptin, a DPP-4 inhibitor, in patients with type 2 diabetes: a 3-year prospective, controlled, observational study (J-BRAND Registry)
- Author
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Masakazu Kobayashi, Hirohito Sone, Haruhiko Osawa, Daisuke Koya, Takanori Miura, Yoshihito Atsumi, Udai Nakamura, Eiichi Araki, Hitoshi Shimano, Yukio Tanizawa, Jiro Nakamura, Yuichiro Yamada, Nobuya Inagaki, Atsuko Abiko, Hideki Katagiri, Michio Hayashi, Keiko Naruse, Shimpei Fujimoto, Masazumi Fujiwara, Kenichi Shikata, Yosuke Okada, Tsutomu Yamazaki, Sou Nagai, Katsuyuki Yanagisawa, Hiromichi Kijima, Shinji Taneda, Shigeyuki Saitoh, Daisuke Ikeda, Fuminori Hirano, Haruhiko Yoshimura, Mitsutaka Inoue, Masahiko Katoh, Osamu Nakagaki, Chiho Yamamoto, Akitsuki Morikawa, Shin Furukawa, Takeshi Koshiya, Hajime Sugawara, Takumi Uchida, Noe Takakubo, Yasushi Ishigaki, Susumu Suzuki, Takashi Shimotomai, Naoki Tamasawa, Jun Matsui, Takashi Goto, Toshihide Oizumi, Shinji Susa, Makoto Daimon, Hiroshi Murakami, Takashi Sugawara, Hiroaki Akai, Mari Nakamura, Yoshiji Ogawa, Takao Yokoshima, Tsuyoshi Watanabe, Michio Shimabukuro, Kazuhisa Tsukamoto, Motoei Kunimi, Jo Satoh, Atushi Okuyama, Kazutaka Ogawa, Hideyuki Eguchi, Mamoru Kimura, Hiroshi Kouno, Yohei Horikawa, Shin Ikejima, Masaru Saitoh, Naoyoshi Minami, Akihiro Sekikawa, Toyoyoshi Uchida, Toshihide Kawai, Nobuya Fujita, Ken Tomotsune, Shigeo Yamashita, Motoji Naka, Toru Hiyoshi, Tomotaka Katoh, Kumiko Hamano, Kouichi Inukai, Takuma Kondo, Kazuhiro Tsumura, Yoko Matsuzawa, Masahiro Mimura, Masahiko Kawasumi, Izumi Takei, Masafumi Matsuda, Ichiro Tatsuno, Nobuyuki Banba, Akihiko Ando, Masao Toyoda, Daisuke Suzuki, Takahiro Iijima, Yasumichi Mori, Yutaka Uehara, Yoshihiko Satoh, Kazuaki Yahata, Yoshimasa Asoh, Koichiro Kuwabara, Souichi Takizawa, Yasushi Tanaka, Koutaroh Yokote, Masako Tohgo, Takanobu Itoi, Shigeru Miyazaki, Hiroshi Itoh, Teruo Shiba, Takahisa Hirose, Mariko Higa, Masanobu Yamada, Osamu Ogawa, Masatoshi Kuroki, Shinobu Satoh, Makoto Ujihara, Kenjiroh Yamanaka, Hajime Koyano, Tadashi Yamakawa, Kenichiroh Takahashi, Kazuki Orime, Tsutomu Hirano, Jiroh Morimoto, Takashi Itoh, Yuzoh Mizuno, Naoyuki Yamamoto, Han Miyatake, Mina Yamaguchi, Kenji Yamane, Masahiko Kure, Satoko Kawabe, Masahumi Kakei, Masashi Yoshida, Hiroyuki Itoh, Nobuaki Minami, Kazuki Kobayashi, Yusuke Fujino, Makoto Shibuya, Midori Hosokawa, Isao Nozaki, Chigure Nawa, Tamio Ieiri, Takayuki Watanabe, Yoshio Katoh, Takuyuki Katabami, Michiko Handa, Issei Shimada, Kenichi Ohya, Yoshihiro Ogawa, Takanobu Yoshimoto, Jiroh Nakamura, Naotsuka Okayama, Kenro Imaeda, Syuko Yoshioka, Masako Murakami, Takashi Murase, Yoshihiko Yamada, Yutaka Yano, Hiromitsu Sasaki, Yasuhiro Sumida, Osamu Yonaha, Hiroshi Sobajima, Mitsuyasu Ito, Atushi Suzuki, Atsuko Ishikawa, Takehiko Ichikawa, Shogo Asano, Shinobu Goto, Sakuma Hiroya, Hiroshi Murase, Shozo Ogawa, Hideki Okamoto, Kotaro Nagai, Koji Nagayama, Masanori Yoshida, Norio Takahashi, Kazuhisa Takami, Tsuneo Ono, Takanobu Morihiro, Daisuke Tanaka, Noriko Takahara, Satoshi Miyata, Mamiko Tsugawa, Koichiro Yasuda, Seiji Muro, Masanori Emoto, Ikuo Mineo, Ichiro Shiojima, Takeshi Kurose, Makoto Ohashi, Yumiko Kawabata, Mitsushige Nishikawa, Emiko Nomura, Yasuyuki Nishimura, Yasuhiro Ono, Yasuhisa Yamamoto, Keigo Naka, Taizo Yamamoto, Rika Usuda, Hiroshi Akahori, Seika Kato, Hiroyuki Konya, Yutaka Umayahara, Takashi Seta, Hideki Taki, Masashi Sekiya, Shinichi Mogami, Sumie Fujii, Toshiyuki Hibuse, Shingo Tsuji, Hirofumi Sumi, Yasuro Kumeda, Akinori Kogure, Kenji Furukawa, Akira Kuroe, Hideaki Sawaki, Narihiro Hibiki, Yoshihiro Kitagawa, Yukihiro Bando, Akira Ono, Rikako Uenaka, Seitaro Omoto, Yuki Kita, Eiko Ri, Ryutaro Numaguchi, Sachiko Kawashima, Ichiro Kisimoto, Kiminori Hosoda, Yoshihiko Araki, Tetsuroh Arimura, Mitsuru Hashiramoto, Koumei Takeda, Akira Matsutani, Yasushi Inoue, Fumio Sawano, Nozomu Kamei, Yasuo Ito, Miwa Morita, Yoshiaki Oda, Rui Kishimoto, Katsuhiro Hatao, Tomoatsu Mune, Fumiko Kawasaki, Hiroki Teragawa, Ken Yaga, Keita Ishii, Kyouji Hirata, Tatsuaki Nakatou, Yutaka Nitta, Naoki Fujita, Masayasu Yoneda, Masatoshi Tsuru, Shinichirou Ando, Toshiaki Kakiba, Michihiro Toyoshige, Tsuguka Shiwa, Hiroaki Miyaoka, Yasumi Shintani, Takenori Sakai, Tetsuji Niiya, Shinpei Fujimoto, Hisaka Minami, Yoshihiko Noma, Masaaki Tamaru, Yoshitaka Sayou, Tomoyo Oyama, Masamoto Torisu, Yuichi Fujinaka, Yoshitaka Kumon, Shozo Miyauchi, Morikazu Onji, Toru Nakamura, Yousuke Okada, Toshihiko Yanase, Kenro Nishida, Syuji Nakamura, Kunihisa Kobayashi, Nobuhiko Wada, Moritake Higa, Koji Matsushita, Yoshihiko Nishio, Ryoji Fujimoto, Yasuyuki Kihara, Shinichiro Mine, Tadashi Arao, Hiromi Tasaki, Yasuto Matsuo, Hirofumi Matsuda, Kohei Uriu, Kazuko Kanda, Kazuo Ibaraki, Yoshio Kaku, Yasuhiro Takaki, Iwaho Hazekawa, Kenji Ebihara, Eiichiro Watanabe, Iku Sakurada, Kazuhisa Muraishi, Tamami Oshige, Junichi Yasuda, Toyoshi Iguchi, Noriyuki Sonoda, Masahiro Adachi, Isao Ichino, Yuko Horiuchi, Souichi Uekihara, Shingo Morimitsu, Mitsuhiro Nakazawa, Tadashi Seguchi, and Kengo Kaneko
- Subjects
Blood Glucose ,safety ,medicine.medical_specialty ,Endocrinology, Diabetes and Metabolism ,Type 2 diabetes ,Hypoglycemia ,Group B ,Diseases of the endocrine glands. Clinical endocrinology ,dipeptidyl peptidase 4 ,Japan ,Piperidines ,Internal medicine ,Diabetes mellitus ,medicine ,Humans ,Hypoglycemic Agents ,Prospective Studies ,Adverse effect ,Uracil ,Aged ,Dipeptidyl-Peptidase IV Inhibitors ,business.industry ,Incidence (epidemiology) ,Type 2 Diabetes Mellitus ,registries ,medicine.disease ,RC648-665 ,Diabetes Mellitus, Type 2 ,type 2 ,diabetes mellitus ,Clinical care/Education/Nutrition ,business ,Alogliptin - Abstract
IntroductionGiven an increasing use of dipeptidyl peptidase-4 (DPP-4) inhibitors to treat patients with type 2 diabetes mellitus in the real-world setting, we conducted a prospective observational study (Japan-based Clinical Research Network for Diabetes Registry: J-BRAND Registry) to elucidate the safety and efficacy profile of long-term usage of alogliptin.Research design and methodsWe registered 5969 patients from April 2012 through September 2014, who started receiving alogliptin (group A) or other classes of oral hypoglycemic agents (OHAs; group B), and were followed for 3 years at 239 sites nationwide. Safety was the primary outcome. Symptomatic hypoglycemia, pancreatitis, skin disorders of non-extrinsic origin, severe infections, and cancer were collected as major adverse events (AEs). Efficacy assessment was the secondary outcome and included changes in hemoglobin A1c (HbA1c), fasting blood glucose, fasting insulin and urinary albumin.ResultsOf the registered, 5150 (group A: 3395 and group B: 1755) and 5096 (3358 and 1738) were included for safety and efficacy analysis, respectively. Group A patients mostly (>90%) continued to use alogliptin. In group B, biguanides were the primary agents, while DPP-4 inhibitors were added in up to ~36% of patients. The overall incidence of AEs was similar between the two groups (42.7% vs 42.2%). Kaplan-Meier analysis revealed the incidence of cancer was significantly higher in group A than in group B (7.4% vs 4.8%, p=0.040), while no significant incidence difference was observed in the individual cancer. Multivariate Cox regression analysis revealed that the imbalanced patient distribution (more elderly patients in group A than in group B), but not alogliptin usage per se, contributed to cancer development. The incidence of other major AE categories was with no between-group difference. Between-group difference was not detected, either, in the incidence of microvascular and macrovascular complications. HbA1c and fasting glucose decreased significantly at the 0.5-year visit and nearly plateaued thereafter in both groups.ConclusionsAlogliptin as a representative of DPP-4 inhibitors was safe and durably efficacious when used alone or with other OHAs for patients with type 2 diabetes in the real world setting.
- Published
- 2020
20. Effects of ocean acidification with pCO2 diurnal fluctuations on survival and larval shell formation of Ezo abalone, Haliotis discus hannai
- Author
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Hideki Takami, Ryo Kimura, Yukio Matsumoto, Yukihiro Nojiri, Tsuneo Ono, Toshihiro Onitsuka, Ayumi Nakatsubo, and Daisuke Muraoka
- Subjects
0106 biological sciences ,Larva ,010504 meteorology & atmospheric sciences ,Abalone ,biology ,Chemistry ,010604 marine biology & hydrobiology ,Aragonite ,Shell (structure) ,Ocean acidification ,General Medicine ,Aquatic Science ,engineering.material ,Oceanography ,biology.organism_classification ,01 natural sciences ,Pollution ,pCO2 ,Animal science ,engineering ,Haliotis discus ,Seawater ,0105 earth and related environmental sciences - Abstract
This study assessed the effects of constant and diurnally fluctuating pCO2 on development and shell formation of larval abalone Haliotis discus hannai. The larvae was exposed to different pCO2 conditions; constant [450, 800, or 1200 μatm in the first experiment (Exp. I), 450 or 780 μatm in the second experiment (Exp. II)] or diurnally fluctuating pCO2 (800 ± 400 or 1200 ± 400 μatm in Exp. I, 450 ± 80, 780 ± 200 or 780 ± 400 μatm in Exp. II). Mortality, malformation rates or shell length of larval abalone were not significantly different among the 450, 800, and 800 ± 400 μatm pCO2 treatments. Meanwhile, significantly higher malformation rates and smaller shells were detected in the 1200 and 1200 ± 400 μatm pCO2 treatments than in the 450 μatm pCO2 treatment. The negative impacts were greater in the 1200 ± 400 μatm than in the 1200 μatm. Shell length and malformation rate of larval abalone were related with aragonite saturation state (Ω-aragonite) in experimental seawater, and greatly changed around 1.1 of Ω-aragonite which corresponded to 1000–1300 μatm pCO2. These results indicate that there is a pCO2 threshold associated with Ω-aragonite in the seawater, and that pCO2 fluctuations produce additional negative impacts on abalone when above the threshold. Clear relationships were detected between abalone fitness and the integrated pCO2 value over the threshold, indicating that the effects of OA on development and shell formation of larval abalone can be determined by intensity and time of exposure to pCO2 over the threshold.
- Published
- 2018
21. Abundance and habitats of marine cladocerans in the Sea of Japan over two decades
- Author
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Takahiko Kameda, Makoto Okazaki, Hiroshige Tanaka, Taketoshi Kodama, Tsuneo Ono, Yosuke Tanaka, Seiji Ohshimo, Hiroshi Ashida, and Toshiyuki Tanabe
- Subjects
0106 biological sciences ,education.field_of_study ,010504 meteorology & atmospheric sciences ,010604 marine biology & hydrobiology ,Pseudevadne tergestina ,Generalized additive model ,Population ,Geology ,Aquatic Science ,Biology ,Plankton ,01 natural sciences ,Evadne nordmanni ,Oceanography ,Habitat ,Abundance (ecology) ,Ecosystem ,education ,0105 earth and related environmental sciences - Abstract
Marine cladocerans are secondary producers in marine neritic ecosystems. To investigate the population dynamics and species-specific habitats of marine cladocerans in the Sea of Japan, marine cladoceran abundance was evaluated in the southern Sea of Japan and the East China Sea-Kuroshio using three mesh-size (0.06, 0.10, and 0.33 mm) plankton nets at several depths (n = 4674) over two decades from 1997 to 2018. We observed seven out of eight species, including Penilia avirostris, Evadne nordmanni, E. spinifera, Pseudevadne tergestina, and Pleopis schmackeri, from > 10% of samples, and Pleopis polyphemoides and Podon leuckartii from
- Published
- 2021
22. Short-term variation in copepod community and physical environment in the waters adjacent to the Kuroshio Current
- Author
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Tsuneo Ono, Tadafumi Ichikawa, Sayaka Sogawa, Takashi Kidachi, Masahumi Nagayama, Yugo Shimizu, and Kiyotaka Hidaka
- Subjects
0106 biological sciences ,education.field_of_study ,geography ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,biology ,Ecology ,010604 marine biology & hydrobiology ,Population ,Species diversity ,Oceanography ,biology.organism_classification ,01 natural sciences ,Zooplankton ,Peninsula ,Upwelling ,education ,Transect ,Bay ,Copepod ,Geology ,0105 earth and related environmental sciences - Abstract
A continuous survey examined short-term variations in the zooplankton community and physical ocean environment from the northeastern Izu Islands to Boso Peninsula in Japan. High copepod abundance and small upwellings in the surface layer and salinity minimum layer in the subsurface were observed on the north side of coastal fronts in the westernmost transect, moving southward as the Kuroshio Current left the Boso Peninsula. Thus, the salinity minimum layer might be a key factor forming upwelling and the fronts, leading to large abundance of coastal copepods off the northeastern Izu Islands. A community structure analysis of calanoid copepods revealed an intermediate belt assemblage between coastal and offshore (Kuroshio) assemblages. Copepod abundance was remarkably low and Ctenocalanus vanus dominated (nearly 37%) in the intermediate belt zone, indicating that C. vanus has a relatively high tolerance to adverse environments for calanoid copepods. As the Kuroshio Current left the Boso Peninsula, the coastal assemblage expanded in the same direction, and the intermediate belt assemblage off the northeastern Izu Islands disappeared. The largest population of Calanus sinicus was found along the two western transects off the northeastern Izu Islands (>1000 m depth), which was assumed to be transported from Sagami Bay and advanced southwestward while growing from copepodite stages CIII to CV. Larvae of C. sinicus would be an important food for fish larvae in addition to Paracalanus parvus s.l., the numerically dominant species in the coastal assemblage, and C. vanus under the adverse conditions for coastal copepods.
- Published
- 2017
23. Radiocesium contamination of aquatic organisms in the estuary of the Abukuma River flowing through Fukushima
- Author
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Daisuke Ambe, Yuya Shigenobu, Tsuneo Ono, Tadafumi Ichikawa, Ken Fujimoto, Tomowo Watanabe, and Takami Morita
- Subjects
geography ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,Stable isotope ratio ,Estuary ,Euryhaline ,010501 environmental sciences ,Aquatic Science ,Contamination ,Oceanography ,01 natural sciences ,Aquatic organisms ,Fishery ,Environmental science ,0105 earth and related environmental sciences - Published
- 2017
24. Feeding habits of six species of euphausiids (Decapoda: Euphausiacea) in the northwestern Pacific Ocean determined by carbon and nitrogen stable isotope ratios
- Author
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Tsuneo Ono, Sayaka Sogawa, Shinji Shimode, Hiroya Sugisaki, Erika Sato, Tomohiko Kikuchi, and Kazuaki Tadokoro
- Subjects
0106 biological sciences ,010504 meteorology & atmospheric sciences ,Stable isotope ratio ,Ecology ,Decapoda ,010604 marine biology & hydrobiology ,chemistry.chemical_element ,Aquatic Science ,Biology ,biology.organism_classification ,01 natural sciences ,Nitrogen ,Pacific ocean ,chemistry ,Euphausiacea ,Carbon ,0105 earth and related environmental sciences - Published
- 2017
25. Concentrations of90Sr and137Cs/90Sr activity ratios in marine fishes after the Fukushima Dai-ichi Nuclear Power Plant accident
- Author
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Yuya Shigenobu, Takami Morita, Daisuke Ambe, Kaori Takagi, Tomowo Watanabe, Hiroya Sugisaki, Tsuneo Ono, Ken Fujimoto, Hideki Kaeriyama, and Shizuho Miki
- Subjects
010504 meteorology & atmospheric sciences ,Activity ratios ,Marine fish ,010501 environmental sciences ,Aquatic Science ,Oceanography ,01 natural sciences ,Background level ,law.invention ,law ,Nuclear power plant ,Environmental science ,Whole body ,0105 earth and related environmental sciences - Abstract
Strontium-90 (90Sr) was released together with radioactive cesium (Cs) from the Fukushima Dai-ichi Nuclear Power Plant (FNPP) accident. Although the total amount of 90Sr released into the marine environment from the FNPP was estimated to be a factor of 100 lower than that of 137Cs, the public have been concerned about the safety of commercial species because of the tendency of accumulation in bones of organisms, its long physical half-life and less information about 90Sr concentrations in commercial species. In this study, we investigated the concentrations of 90Sr in marine fishes off Japan before and after the FNPP accident. Except for within a 20-km radius from the FNPP, 90Sr concentrations higher than the background level (
- Published
- 2016
26. Supplementary material to 'Long-term trends in pH in Japanese coastal waters'
- Author
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Miho Ishizu, Yasumasa Miyazawa, Tomohiko Tsunoda, and Tsuneo Ono
- Published
- 2019
27. Long-term trends in pH in Japanese coastal waters
- Author
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Miho Ishizu, Yasumasa Miyazawa, Tomohiko Tsunoda, and Tsuneo Ono
- Abstract
In recent decades, acidification of the open ocean has shown consistent increases. However, analysis of long-term data in coastal waters shows that the pH is highly variable because of coastal processes and anthropogenic carbon inputs. It is therefore important to understand how anthropogenic carbon inputs and other natural or anthropogenic factors influence the temporal trends in pH in coastal waters. Using water quality data collected at 1481 monitoring sites as part of the Water Pollution Control Program, we determined the long-term trends in pH in Japanese coastal waters at ambient temperature from 1978 to 2009. We found that pH decreased (i.e., acidification) at between 70 % and 75 % of the sites and increased (i.e., basification) at between 25 % and 30 % of the sites. The rate of decrease varied seasonally and was, on average, −0.0014 yr−1 in summer and −0.0024 yr−1 in winter, but with relatively large deviations from these average values. While the overall trends reflect acidification, watershed processes might also have contributed to the large variations in pH in coastal waters. The seasonal variation in the average pH trends reflects variability in warming trends, while regional differences in pH trends are partly related to heterotrophic water processes induced by nutrient loadings.
- Published
- 2019
28. Supplementary material to 'The influence of decadal oscillations on the oxygen and nutrient trends in the Pacific Ocean'
- Author
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Lothar Stramma, Sunke Schmidtko, Steven J. Bograd, Tsuneo Ono, Tetjana Ross, Daisuke Sasano, and Frank A. Whitney
- Published
- 2019
29. The influence of decadal oscillations on the oxygen and nutrient trends in the Pacific Ocean
- Author
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Sunke Schmidtko, Lothar Stramma, Frank A. Whitney, Daisuke Sasano, Tetjana Ross, Steven J. Bograd, and Tsuneo Ono
- Subjects
geography ,La Niña ,geography.geographical_feature_category ,Oceanography ,Nutrient ,Ocean gyre ,Effects of global warming on oceans ,Climate change ,Environmental science ,Context (language use) ,Oceanic basin ,Pacific decadal oscillation - Abstract
A strong oxygen deficient layer is located in the upper layer of the tropical Pacific Ocean and at deeper depths in the North Pacific. Processes related to climate change (upper ocean warming, reduced ventilation) are expected to change ocean oxygen and nutrient inventories. In most ocean basins, a decrease in oxygen (‘deoxygenation’) and an increase of nutrients has been observed in subsurface layers. Deoxygenation trends are not linear and there could be other influences on oxygen and nutrient trends and variability. Here oxygen and nutrient time series since 1950 in the Pacific Ocean were investigated at 50 to 300 m depth, as this layer provides critical pelagic habitat for biological communities. In addition to trends related to ocean warming the oxygen and nutrient trends show a strong influence of the Pacific Decadal Oscillation (PDO) in the tropical and the eastern Pacific, and the North Pacific Gyre Oscillation (NPGO) especially in the North Pacific. In the Oyashio Region the PDO, the NPGO, the North Pacific Index (NPI) and a 18.6 year nodal tidal cycle overlay the long-term trend. In most regions oxygen increases and nutrients decrease in the 50 to 300 m layer during the negative PDO phase, with opposite trends during the positive PDO phase. The PDO index encapsulates the major mode of surface temperature variability in the Pacific and oxygen and nutrients trends throughout the basin can be described in the context of the PDO phases. An influence of the subtropical-tropical cell in the tropical Pacific cannot be proven with the available data. El Niño and La Niña years often influence the oxygen and nutrient distribution during the event in the eastern tropical Pacific, but do not have a multi-year influence on the trends.
- Published
- 2019
30. Global distribution and variability of subsurface chlorophyll a concentration.
- Author
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Sayaka Yasunaka, Tsuneo Ono, Kosei Sasaoka, and Kanako Sato
- Subjects
CHLOROPHYLL ,MIXING height (Atmospheric chemistry) ,RADIATION absorption ,OCEAN dynamics ,SEASONS - Abstract
Chlorophyll a (Chl-푎) often retains its maximum concentration not at the surface but in the subsurface layer. The depth of the Chl-푎 maximum primarily depends on the balance between light penetration from the surface and nutrient supply from the deep ocean. However, a global map of subsurface Chl-푎 concentrations based on observations has not been presented yet. In this study, we integrate Chl-푎 concentration data not only from recent biogeochemical floats but also from historical ship-based and other observations, and present global maps of subsurface Chl-푎 concentration with related variables. The subsurface Chl-푎 maximum deeper than the mixed layer depth was stably observed in the subtropics and tropics (30°S to 30°N), only in summer in midlatitudes (30–40°N/S), and rarely at 45–60°S of the Southern Ocean and in the northern North Atlantic (north of 45°N). The depths of the subsurface Chl-푎 maxima are deeper than those of the euphotic layer in the subtropics and shallower in the tropics and midlatitudes. In the subtropics, seasonal oxygen increases below the mixed layer implied substantial biological new production, which corresponds to 10% of the net primary production there. During El Niño, the subsurface Chl-푎 concentration in the equatorial Pacific is higher in the middle to the east and lower in the west than that during La Niña, which is opposite that on the surface. The spatiotemporal variability of the Chl-a concentration described here would be suggestive results not only for the biogeochemical cycle in the ocean but also for the thermal structure and the dynamics of the ocean via the absorption of shortwave radiation. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
31. A multi-decade record of high-quality fCO2 data in version 3 of the Surface Ocean CO2 Atlas (SOCAT)
- Author
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Abdirahman M Omar, J. Severino P. Ibánhez, Peter Landschützer, Dorothee C. E. Bakker, Christopher W. Hunt, Richard A. Feely, Camilla S. Landa, Liliane Merlivat, Lisa L. Robbins, Akira Kuwata, K. Smith, Kazuaki Tadokoro, Jacqueline Boutin, Betty Huss, Naomi Greenwood, Yann Bozec, Bernd Schneider, Alejandro A. Bianchi, Mario Hoppema, Adrienne J. Sutton, S. Hankin, Tsuneo Ono, Bronte Tilbrook, Wiley Evans, Kim I. Currie, Leticia Barbero, David R. Munro, Matthias Tuma, Stewart C Sutherland, Ansley Manke, Nathalie Lefèvre, Evangelia Krasakopoulou, S. Harasawa, Denis Pierrot, Catherine Goyet, Brian Ward, Judith Hauck, Are Olsen, R. D. Castle, K. O'Brien, Nick J. Hardman-Mountford, Eugene Burger, Wei-Jun Cai, Jérôme Harlay, Joe Salisbury, Arne Körtzinger, Shin-Ichiro Nakaoka, Yukihiro Nojiri, Akihiko Murata, Frank J. Millero, Tobias Steinhoff, Carlos F. Balestrini, Truls Johannessen, Melissa Chierici, Alex Kozyr, Andrew J. Watson, Catherine E Cosca, Ingunn Skjelvan, Taro Takahashi, Charles Featherstone, Nicolas Metzl, Agneta Fransson, Chisato Wada, Ralph F. Keeling, David A. Pearce, Steven van Heuven, Doug Vandemark, Rainer Sieger, Matthew P. Humphreys, Kevin F. Sullivan, Reiner Schlitzer, Rik Wanninkhof, Timothy Newberger, K. Paterson, Vassilis Kitidis, Suqing Xu, Siv K. Lauvset, Liqi Chen, Nicholas R. Bates, Ute Schuster, Colm Sweeney, Frédéric Bonou, Luke Gregor, Roland Schweitzer, Claire Lo Monaco, S. Saito, Benjamin Pfeil, Pedro M. S. Monteiro, Jeremy T. Mathis, Stephen D. Jones, Maciej Telszewski, and Simone R. Alin
- Subjects
0106 biological sciences ,equatorial pacific ,010504 meteorology & atmospheric sciences ,Meteorology ,Data products ,interannual variability ,Computer science ,Surface ocean ,computer.software_genre ,01 natural sciences ,Upload ,Documentation ,carbon sink ,north-atlantic ,14. Life underwater ,southern-ocean ,flux variability ,atlantic-ocean ,0105 earth and related environmental sciences ,atmospheric co2 ,Data collection ,Database ,010604 marine biology & hydrobiology ,neural-network ,Earth system science ,Data set ,mixed-layer scheme ,Upgrade ,13. Climate action ,General Earth and Planetary Sciences ,computer - Abstract
The Surface Ocean CO2 Atlas (SOCAT) is a synthesis of quality-controlled fCO2 (fugacity of carbon dioxide) values for the global surface oceans and coastal seas with regular updates. Version 3 of SOCAT has 14.7 million fCO2 values from 3646 data sets covering the years 1957 to 2014. This latest version has an additional 4.6 million fCO2 values relative to version 2 and extends the record from 2011 to 2014. Version 3 also significantly increases the data availability for 2005 to 2013. SOCAT has an average of approximately 1.2 million surface water fCO2 values per year for the years 2006 to 2012. Quality and documentation of the data has improved. A new feature is the data set quality control (QC) flag of E for data from alternative sensors and platforms. The accuracy of surface water fCO2 has been defined for all data set QC flags. Automated range checking has been carried out for all data sets during their upload into SOCAT. The upgrade of the interactive Data Set Viewer (previously known as the Cruise Data Viewer) allows better interrogation of the SOCAT data collection and rapid creation of high-quality figures for scientific presentations. Automated data upload has been launched for version 4 and will enable more frequent SOCAT releases in the future. High-profile scientific applications of SOCAT include quantification of the ocean sink for atmospheric carbon dioxide and its long-term variation, detection of ocean acidification, as well as evaluation of coupled-climate and ocean-only biogeochemical models. Users of SOCAT data products are urged to acknowledge the contribution of data providers, as stated in the SOCAT Fair Data Use Statement. This ESSD (Earth System Science Data) "living data" publication documents the methods and data sets used for the assembly of this new version of the SOCAT data collection and compares these with those used for earlier versions of the data collection (Pfeil et al., 2013; Sabine et al., 2013; Bakker et al., 2014). Individual data set files, included in the synthesis product, can be downloaded here: doi:10.1594/PANGAEA.849770. The gridded products are available here: doi:10.3334/CDIAC/OTG.SOCAT_V3_GRID.
- Published
- 2016
32. Long‐term variability of surface nutrient concentrations in the North Pacific
- Author
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Akihiko Murata, Tsuneo Ono, C. Wada, Shigeki Hosoda, Frank A. Whitney, Sayaka Yasunaka, Yukihiro Nojiri, and S. Nakaoka
- Subjects
geography ,geography.geographical_feature_category ,010504 meteorology & atmospheric sciences ,010505 oceanography ,North Pacific High ,01 natural sciences ,Subarctic climate ,chemistry.chemical_compound ,Geophysics ,Oceanography ,Nutrient ,Long term trend ,Nitrate ,chemistry ,Ocean gyre ,General Earth and Planetary Sciences ,Environmental science ,Pacific decadal oscillation ,0105 earth and related environmental sciences - Abstract
We present the spatial distributions and temporal changes of the long-term variability of surface nutrient concentrations in the North Pacific by using nutrient samples collected by volunteer ships and research vessels from 1961 to 2012. Nutrient samples are optimally interpolated onto 1° × 1° monthly grid boxes. When the Pacific Decadal Oscillation is in its positive phase, nutrient concentrations in the western North Pacific are significantly higher than the climatological means, and those in the eastern North Pacific are significantly lower. When the North Pacific Gyre Oscillation is in its positive phase, nutrient concentrations in the subarctic are significantly higher than the climatological means. The trends of phosphate and silicate averaged over the North Pacific are −0.012 ± 0.005 µmol l−1 decade−1 and −0.38 ± 0.13 µmol l−1 decade−1, whereas the nitrate trend is not significant (0.01 ± 0.13 µmol l−1 decade−1).
- Published
- 2016
33. Seasonal and regional change in vertical distribution and diel vertical migration of four euphausiid species (Euphausia pacifica, Thysanoessa inspinata, T. longipes, and Tessarabrachion oculatum) in the northwestern Pacific
- Author
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Tsuneo Ono, Yuji Okazaki, Tomohiko Kikuchi, Sayaka Sogawa, Shinji Shimode, Hiroaki Saito, and Hiroya Sugisaki
- Subjects
0106 biological sciences ,Thysanoessa ,Chlorophyll a ,010504 meteorology & atmospheric sciences ,biology ,Ecology ,Mesopelagic zone ,010604 marine biology & hydrobiology ,media_common.quotation_subject ,Aquatic Science ,Oceanography ,biology.organism_classification ,01 natural sciences ,Euphausia pacifica ,Competition (biology) ,chemistry.chemical_compound ,Tessarabrachion ,chemistry ,Transect ,Diel vertical migration ,0105 earth and related environmental sciences ,media_common - Abstract
We studied seasonal and regional change in vertical distribution and DVM patterns of four euphausiid species (Euphausia pacifica, Thysanoessa inspinata, Thysanoessa longipes, and Tessarabrachion oculatum) from two years of surveys using MOCNESS above 1500 m depth across a transect in 3 regions of the northwestern (NW) Pacific, off east of Japan; Oyashio, Kuroshio, and Oyashio–Kuroshio Mixed Water Regions (MWR). The four euphausiid species exhibited a regional change in vertical distribution, i.e., slightly deeper in the MWR and much deeper in the Kuroshio region than in the Oyashio region. They found in higher and wider temperature ranges in the MWR than in the Oyashio region, which demonstrated that the four species were able to adapt to different temperatures in different regions. In the MWR and Oyashio regions, E. pacifica is a surface migrant (differences between day and night mean median depths, D-N, were ca. 300 m) and T. oculatum is a moderate subsurface migrant that performs short DVM in the upper mesopelagic zone (D-N ca. 100 m). The other two morphologically similar Thysanoessa species (T. inspinata and T. longipes) segregated vertically between E. pacifica and T. oculatum at night in the Oyashio region, suggesting vertical habitat partitioning with the former two species but not with themselves. However, a seasonal pattern was observed in the vertical distribution and DVM of T. longipes in the Oyashio region. It behaves as a surface migrant in May, whereas most of individuals were found in the mesopelagic layer in September. In contrast, T. inspinata did not exhibit a clear DVM throughout the year (i.e., a moderate subsurface migrant). This seasonal difference might be a strategy to minimize competition between related species. Among the four species, only E. pacifica was found in higher temperatures at night than during the daytime, and the highest temperatures at the median depth varied among species (from 7.5 °C to 13.7 °C) although the lowest temperature did not vary greatly (from 1.0 °C to 1.8 °C), which indicates high temperatures act as a limiting factor as opposed to low temperatures. Furthermore, the integrated chlorophyll a values exhibited significant negative correlation with median depths of only E. pacifica at night. These results indicate a strategy which makes E. pacifica the dominant species in the area, that is, it has a trade-off of long migrations and a warmer environment that accelerates metabolism, in return for obtaining a food-rich environment.
- Published
- 2016
34. Vertical distribution of larval Pacific bluefin tuna, Thunnus orientalis, in the Japan Sea
- Author
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Taiki Ishihara, Seishiro Furukawa, Nobuaki Suzuki, Makoto Okazaki, Tsuneo Ono, Etsuro Sawai, Kenji Nohara, Seiji Ohshimo, Masanori Kawazu, Atsushi Tawa, Taketoshi Kodama, Satoru N. Chiba, and Hirohiko Takeshima
- Subjects
0106 biological sciences ,Larva ,geography ,geography.geographical_feature_category ,biology ,010604 marine biology & hydrobiology ,Pacific bluefin tuna ,Body size ,Oceanography ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Sink (geography) ,Habitat ,Environmental science ,Subsurface flow ,Diel vertical migration ,Thermocline - Abstract
To better understand habitats of larval Pacific bluefin tuna (PBT; Thunnus orientalis) in the nursery grounds, the vertical distribution of larval PBT was collected using a 1-m2 Tucker trawl and a 3.14-m2 ring net at depths of 0, 10, 20, and 30 m during the spawning seasons of 2016 and 2017. Most of the larvae in the Japan Sea (756 of 938 individuals) were collected from the surface layer using a ring net, while similar numbers were collected from 0 to 20 m depth in the Nansei area. The temperature at ≥20 m depths in the Japan Sea was cooler than the optima temperature, and the thermocline was steep at 10 m depth, and the cold subsurface water was suggested to make the PBT larvae aggregate near the surface. A weak ontogenetic and diel migration was observed; the body size at 10 m depth during the day and 0 m at night were significantly larger than those at 0 m during the day in the Japan Sea. These results suggested that some small larvae sink to 10 m and/or large larvae move to the surface at night. Our results showed that the larval PBT habitat is strongly controlled by water temperature, and that global warming would have a positive effect on PBT larvae in the Japan Sea, which was evidenced by the higher density of PBT larvae after 2010 compared to before 1990.
- Published
- 2020
35. Effect of seasonal change in gas transfer coefficient on air–sea CO2 flux in the western North Pacific
- Author
-
Tsuneo Ono, Yasuhiro Yamanaka, Taketo Hashioka, Yoshio Masuda, and Xuanrui Xiong
- Subjects
Atmosphere ,Oceanography ,Environmental science ,North Pacific High ,East Asian Monsoon ,Flux ,Marine ecosystem ,Seawater ,Subtropics ,Subarctic climate - Abstract
We used an eddy-permitting three-dimensional ocean ecosystem model and applied it in the western North Pacific to understand the seasonal variations and horizontal distributions of the air–sea CO2 flux and difference in the partial pressure between sea water and the atmosphere (∆pCO2). The high-resolution model reproduced the observed zonal belt of strong CO2 uptake in the mid-latitude (30–45°N) western North Pacific including the Kuroshio extension and mixed water regions, which was difficult to show in previous coarse-resolution models. The East Asian winter monsoon, an important phenomenon in the western North Pacific, affects the seasonal CO2 air–sea gas exchange with a high (low) gas transfer coefficient in winter (summer). In the subtropical region, ∆pCO2 is negative in winter and positive in summer as a result of the temperature effect. Combination of seasonal change in gas transfer coefficient with ∆pCO2 suppresses CO2 release in the subtropical region, and vice versa in the subarctic region (i.e., suppresses CO2 uptake). That is, the East Asian winter monsoon in the western North Pacific contributes to the reduction of the annual CO2 flux through the seasonal change in the gas transfer coefficient, leading to an overall annual CO2 uptake in the subtropical region and CO2 release in the subarctic region.
- Published
- 2015
36. Calcium carbonate saturation and ocean acidification in Tokyo Bay, Japan
- Author
-
Naohiro Kosugi, Masao Ishii, Michiyo Yamamoto-Kawai, Tsuneo Ono, Atsushi Kubo, Natsuko Kawamura, and Jota Kanda
- Subjects
Aragonite ,Hypoxia (environmental) ,Ocean acidification ,Seasonality ,engineering.material ,Oceanography ,medicine.disease ,medicine ,engineering ,Environmental science ,Submarine pipeline ,Ecosystem ,Eutrophication ,Bay - Abstract
From April 2011 to January 2012, seasonal variation of the aragonite saturation state (Ωar) was observed for the first time in Tokyo Bay, in order to understand the current state of ocean acidification in a highly eutrophicated bay in Japan. Ωar in the bay ranged between 1.55 and 5.12, much greater than observed in offshore waters. At the surface, Ωar was high during summer as a result of photosynthesis with some conflicting effect of freshwater input. At the bottom, Ωar was low during summer due to remineralization of organic matter. Based on an assumption that our observations represent current conditions in Tokyo Bay, it is estimated that the emission of anthropogenic CO2 has already decreased Ωar by 0.6 since the preindustrial period and will further decrease by 1.0–1.6 by the end of this century if emission of CO2 is continued at a high level [representative concentration pathway (RCP) 8.5 scenario]. With other conditions remaining the same, bottom waters of the bay will reach seasonal aragonite undersaturation by 2060–2070. However, because coastal regions have a large interannual variability, we need further observations to evaluate our estimations and future predictions presented here. Nevertheless, it should be safe to say that the larger seasonal variation in Ω causes the Tokyo Bay to reach aragonite undersaturation earlier than offshore regions and such conditions have negative consequences on the variety of calcifying organisms living in Tokyo Bay. Ocean acidification could thus give an additional stress to the ecosystem of the bay, which is now suffering from eutrophication and hypoxia.
- Published
- 2015
37. Comparison of radioactive cesium contamination of lake water, bottom sediment, plankton, and freshwater fish among lakes of Fukushima Prefecture, Japan after the Fukushima fallout
- Author
-
Tsuneo Ono, Kaori Takagi, Takami Morita, Atsushi Tomiya, Keishi Matsuda, Masahiro Enomoto, Daisuke Ambe, Kazuo Uchida, Ken Fujimoto, Hideki Kaeriyama, Jun-ichi Tsuboi, and Shoichiro Yamamoto
- Subjects
Radionuclide ,biology ,Fish species ,Sediment ,Aquatic Science ,Plankton ,Contamination ,biology.organism_classification ,Lake water ,Fishery ,Oceanography ,parasitic diseases ,Freshwater fish ,Environmental science ,Trophic level - Abstract
Levels of radiocesium (134Cs + 137Cs) contamination in lake water, bottom sediment, plankton, and fish were investigated in three geographically separated lakes in Fukushima Prefecture (Lake Hayama, Lake Akimoto, and Lake Tagokura) between June 2012 and November 2013. Levels of contamination differed among the three lakes, with the highest levels of each measured component in Lake Hayama, followed by Lake Akimoto, and the least contamination in Lake Tagokura. Among the lakes, the magnitude of contamination decreased with distance from the Fukushima Dai-ichi Nuclear Power Plant. Mean radiocesium concentrations were higher in piscivorous fish than in other fish, possibly reflecting differences in trophic level. The radiocesium concentrations in some fish species decreased significantly by 33–65 % during the period between 2012 and 2013. Radiocesium concentrations of the lake water, bottom sediment, plankton, and fish were significantly correlated with surface soil radiocesium content near lake sites.
- Published
- 2015
38. Exposure of a herbivorous fish to 134Cs and 137Cs from the riverbed following the Fukushima disaster
- Author
-
Ken Fujimoto, Hideki Kaeriyama, Takami Morita, Shin-ichiro Abe, Tsuneo Ono, Kei'ichiro Iguchi, Masahiro Enomoto, Atsushi Tomiya, Keishi Matsuda, Jun-ichi Tsuboi, Daisuke Ambe, and Shoichiro Yamamoto
- Subjects
Radionuclide ,Ecology ,Health, Toxicology and Mutagenesis ,General Medicine ,Silt ,Biology ,biology.organism_classification ,Pollution ,Soil contamination ,Food chain ,Animal science ,Algae ,Bioaccumulation ,Environmental Chemistry ,Plecoglossus altivelis ,Waste Management and Disposal ,Trophic level - Abstract
Ayu Plecoglossus altivelis, a herbivorous fish, is an important fishery resource and key component of the foodweb in many Japanese streams. Radionuclide contamination of this species is likely transferred to higher trophic levels, include humans, in the food chain. After the Fukushima accident in March 2011, ayu were exposed to highly contaminated silt while feeding on algae attached to the riverbed stones. To understand the route by which herbivorous fish are exposed to radionuclides, the activity concentrations of sum of (134)Cs and (137)Cs (radiocesium) were analyzed in riverbed samples (algae and silt) and in the internal organs and the muscle of ayu in five river systems in the Fukushima Prefecture between summer 2011 and autumn 2013. Although there was a positive correlation between the radiocesium activity concentrations in the muscle and the internal organs of ayu, the median activity concentration in the muscle was much lower than those in the internal organs. The activity concentrations of radiocesium in the riverbed samples and the internal organs and the muscle of ayu were correlated with contamination levels in soil samples taken from the watershed upstream of the sample sites. The results of the generalized linear mixed models suggest that the activity concentrations in both the internal organs and the muscle of ayu declined over time. Additionally, the activity concentrations in the internal organs were correlated with those in the riverbed samples that were collected around the same time as the ayu. The activity concentrations in the muscle were correlated with ayu body size. Our results suggest that ayu ingest (134)Cs and (137)Cs while grazing silt and algae from the riverbed, and a part of the (134)Cs and (137)Cs is assimilated into the muscle of the fish.
- Published
- 2015
39. Concentration of 134Cs + 137Cs bonded to the organic fraction of sediments offshore Fukushima, Japan
- Author
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Tsuneo Ono, Takashi Fujikawa, Daisuke Ambe, Tomowo Watanabe, Yuya Shigenobu, Ken Fujimoto, Kiyoshi Sogame, Hideki Kaeriyama, Takami Morita, and Nobuya Nishiura
- Subjects
chemistry.chemical_classification ,Radiochemistry ,chemistry.chemical_element ,Sediment ,Organic fraction ,Geophysics ,chemistry ,Benthos ,Geochemistry and Petrology ,Caesium ,Environmental chemistry ,Environmental science ,Submarine pipeline ,Organic matter ,Seawater - Published
- 2015
40. Spatial and Seasonal Variations of Stable Isotope Ratios of Particulate Organic Carbon and Nitrogen in the Surface Water of the Kuroshio.
- Author
-
Taketoshi Kodama, Atsushi Nishimoto, Sachiko Horii, Daiki Ito, Tamaha Yamaguchi, Kiyotaka Hidaka, Takashi Setou, and Tsuneo Ono
- Subjects
PARTICULATE matter ,MARINE pollution ,STABLE isotopes ,CARBON content of seawater ,NITROGEN content of sewage ,KUROSHIO - Abstract
Seasonal stable isotope ratios of carbon and nitrogen (δ
13 C and δ15 N) in the particulate organic matter (POM) of the euphotic layer were investigated around the Kuroshio from 2008 to 2019 (n = 474). Significant seasonality in POM δ13 C and δ15 N were observed in the coastal and offshore areas divided by the northern edge of the Kuroshio. Seasonal mean δ13 C was highest during the summer (-23.2 ± 1.1‰ and -23.7 ± 1.1‰ in coastal and offshore areas, respectively) and lowest during the winter (-24.6 ± 0.8‰ and -25.0 ± 0.9‰ in coastal and offshore areas, respectively) in both areas. Seasonal mean δ15 N exhibited different spatial variations. The mean δ15 N value in the coastal area was the lowest during the winter (1.0 ± 1.9‰) and increased to a similar level (-3‰) during the other three seasons. In contrast, δ15 N in the offshore area near the surface decreased from the spring (2.5 ± 1.5‰) to the summer (1.2 ± 1.7‰). These spatial and seasonal differences in δ15 N are significant in generalized linear models and the generalized additive models, and suggest that the nitrogen sources used in biological production differ between coastal and offshore areas and between seasons. Nitrate originating in deeper water and rivers is the main sources used for new production throughout the year in the coastal area. Contributions from atmospheric deposition and nitrogen fixation are significant in the offshore area during the summer, while nitrate originating in deeper water is main during winter, spring, and fall in the offshore area. [ABSTRACT FROM AUTHOR]- Published
- 2021
- Full Text
- View/download PDF
41. Organic matter production response to CO 2 increase in open subarctic plankton communities: Comparison of six microcosm experiments under iron-limited and -enriched bloom conditions
- Author
-
Koji Sugie, Tsuneo Ono, Jun Nishioka, Hisashi Endo, Koji Suzuki, and Takeshi Yoshimura
- Subjects
chemistry.chemical_classification ,Total organic carbon ,Ecology ,Ocean acidification ,Aquatic Science ,Plankton ,Oceanography ,High-Nutrient, low-chlorophyll ,chemistry ,Environmental chemistry ,Dissolved organic carbon ,Phytoplankton ,Environmental science ,Organic matter ,Microcosm - Abstract
Increase in seawater pCO2 and the corresponding decrease in pH caused by the increasing atmospheric CO2 concentration (i.e., ocean acidification) may affect organic matter production by phytoplankton communities. Organic matter production forms the basis of marine food webs and plays a crucial role in oceanic CO2 uptake through the biological carbon pump, and hence will potentially affect future marine ecosystem dynamics. However, responses of organic matter production in open ocean plankton ecosystems to CO2 increase have not been fully examined. We conducted on-deck microcosm experiments using high nutrient, low chlorophyll (HNLC) waters in the western subarctic Pacific and oceanic Bering Sea basin in summer 2008 and 2009, respectively, to examine the impacts of elevated CO2 on particulate and dissolved organic matter (i.e., POM and DOM, respectively) production. Iron deficient natural plankton communities were incubated for 7–14 days under multiple CO2 levels with and without iron enrichments (hereafter +Fe and −Fe treatments, respectively). By combining with our previous experiments at two sites, we created a comprehensive dataset on responses of organic matter production to CO2 increase during macronutrient replete conditions in HNLC waters. Significant differences in net particulate organic carbon production among CO2 treatments were observed only in the −Fe treatments, whereas that in net dissolved organic carbon production were mainly observed in the +Fe treatments, suggesting that CO2 may affect different processes depending on the Fe nutritional status. However, impacts of CO2 were not consistent among experiments and were much smaller than the consistent positive effects of Fe enrichment. In contrast, no significant differences among the CO2 treatments were observed for organic carbon partitioning into POM and DOM, and carbon to nitrogen ratio of net produced POM. We conclude that CO2 does not play a primary role, but could have secondary effects on controlling the organic matter production under macronutrient replete conditions in HNLC waters. On the other hand, in a nutrient-depleted, declining phase of the phytoplankton bloom induced by Fe enrichment, carbon overconsumption was found in an experiment with elevated CO2 conditions suggesting that CO2 impacts might become more significant in such environments.
- Published
- 2014
42. Fukushima-derived radionuclides 134Cs and 137Cs in zooplankton and seawater samples collected off the Joban-Sanriku coast, in Sendai Bay, and in the Oyashio region
- Author
-
Takami Morita, Tsuneo Ono, Yuya Shigenobu, Yoji Narimatsu, Shin-ichi Ito, Yuji Okazaki, Daisuke Ambe, Ken Fujimoto, Hideki Kaeriyama, Kazuaki Tadokoro, Kaoru Nakata, Shigeho Kakehi, and Tomowo Watanabe
- Subjects
Anthropogenic radionuclides ,Fishery ,East coast ,Radionuclide ,Oceanography ,Environmental science ,Seawater ,Aquatic Science ,Contamination ,Bay ,Zooplankton - Abstract
The Fukushima Dai-ichi nuclear power plant (FNPP) accident that followed the Great East Japan Earthquake in 2011 resulted in the release of enormous quantities of anthropogenic radionuclides, especially radioactive cesium (134Cs and 137Cs) into the ocean off the east coast of Japan. FNPP-derived radioactive Cs may have consequently accumulated within marine food webs via seawater intake and predator–prey interactions. We provide evidence of the temporal variability in 134Cs and 137Cs concentrations in seawater and zooplankton samples collected in coastal waters off Joban-Sanriku, in Sendai Bay, and in the Oyashio region between June 2011 and December 2013. In Sendai Bay, seawater 134Cs and 137Cs concentrations exceeded 1 Bq/kg in June 2011 and rapidly decreased during the study period. 134Cs and 137Cs concentrations in zooplankton were also high in June 2011, up to 23 Bq/kg-wet and also decreased during the study period, although at a slower rate than seawater 134Cs and 137Cs concentrations. Regarding 137Cs concentrations, the difference in the rate of decrease between seawater and zooplankton resulted in a high apparent concentration ratio (aCR) for zooplankton. The observed relation between 137Cs in seawater and the aCR of zooplankton were good indicators of the progress of 137Cs contamination in zooplankton from the beginning of the FNPP accident to the restoration phase.
- Published
- 2014
43. Mapping of sea surface nutrients in the North Pacific: Basin-wide distribution and seasonal to interannual variability
- Author
-
S. Nakaoka, Tsuneo Ono, Yukihiro Nojiri, Sayaka Yasunaka, Maciej Telszewski, and Frank A. Whitney
- Subjects
Geophysics ,Oceanography ,Nutrient ,Space and Planetary Science ,Geochemistry and Petrology ,business.industry ,Earth and Planetary Sciences (miscellaneous) ,Environmental science ,Distribution (economics) ,business ,Pacific basin - Published
- 2014
44. Effects of ocean acidification with pCO
- Author
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Toshihiro, Onitsuka, Hideki, Takami, Daisuke, Muraoka, Yukio, Matsumoto, Ayumi, Nakatsubo, Ryo, Kimura, Tsuneo, Ono, and Yukihiro, Nojiri
- Subjects
Animal Shells ,Larva ,Oceans and Seas ,Gastropoda ,Animals ,Seawater ,Carbon Dioxide ,Hydrogen-Ion Concentration ,Calcium Carbonate ,Environmental Monitoring - Abstract
This study assessed the effects of constant and diurnally fluctuating pCO
- Published
- 2017
45. Evidence of westward transoceanic migration of Pacific bluefin tuna in the Sea of Japan based on stable isotope analysis
- Author
-
Taiki Ishihara, Tsuneo Ono, Atsushi Tawa, Yuki Uematsu, and Seiji Ohshimo
- Subjects
0106 biological sciences ,Stock assessment ,Ecology ,biology ,010604 marine biology & hydrobiology ,Pacific bluefin tuna ,Baseline (sea) ,δ15N ,Aquatic Science ,Disease cluster ,biology.organism_classification ,010603 evolutionary biology ,01 natural sciences ,Pacific ocean ,Fishery ,Ecology, Evolution, Behavior and Systematics ,Thunnus ,Isotope analysis - Abstract
Pacific bluefin tuna (Thunnus orientalis; PBFT) is a highly migratory species, with some individuals migrating between the western Pacific Ocean (WPO) and eastern Pacific Ocean (EPO). In this study, we used stable isotope analysis to identify PBFT that had recently undergone westward transoceanic migration on the Sea of Japan. A total of 155 PBFT individuals were examined. Their ages ranged from 2 to 17 years, with most individuals being 2–7 years of age. Individuals from each year class were classified as WPO residents or recent EPO migrants using cluster analysis of δ15N values. Individuals aged 2, 6, and over 7 years had unimodal distributions of δ15N values, while individuals aged 3, 4 and 5 years showed a bimodal distribution with high- and low-δ15N groups. Due to the overall higher baseline of δ15N values in the EPO, high δ15N individuals were considered to represent PBFT that had migrated from the EPO. Though individuals aged 6 and over 7 years showed unimodal distributions in the cluster analysis, discriminant analysis indicated that these PBFT also included some migrants from the EPO. We preliminary estimated the percentages of migrants and residents in the Sea of Japan. Such information can improve stock assessments models for PBFT and contribute to the sustainable stock management of this species.
- Published
- 2017
46. 134Cs and 137Cs in seawater around Japan after the Fukushima Daiichi Nuclear Power Plant accident
- Author
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Kaoru Nakata, Tomowo Watanabe, Ken Fujimoto, Yuya Shigenobu, Tsuneo Ono, Hideki Kaeriyama, Daisuke Ambe, and Takami Morita
- Subjects
Fukushima daiichi ,Waste management ,law ,Nuclear power plant ,Environmental science ,Seawater ,law.invention - Published
- 2014
47. North Pacific dissolved inorganic carbon variations related to the Pacific Decadal Oscillation
- Author
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Tsuneo Ono, Yukihiro Nojiri, Hitoshi Mukai, Sayaka Yasunaka, S. Nakaoka, and Norihisa Usui
- Subjects
North Pacific Oscillation ,Geophysics ,Oceanography ,Seesaw molecular geometry ,Advection ,Anomaly (natural sciences) ,Dissolved organic carbon ,General Earth and Planetary Sciences ,Forcing (mathematics) ,Subarctic climate ,Pacific decadal oscillation ,Geology - Abstract
We elucidated multiyear variations of sea surface dissolved inorganic carbon (DIC) concentrations in the North Pacific from 2002 to 2008 by using monthly DIC maps derived from partial pressure CO2 observations. The Pacific Decadal Oscillation (PDO) was related to an east-west seesaw pattern in the North Pacific DIC anomaly field. In the western North Pacific, DIC concentrations were relatively high from mid-2002 to mid-2005 and low after late 2007 compared with climatological values, and in the eastern North Pacific the opposite change was observed. Changes of the forcing factors associated with the PDO could explain the DIC east-west seesaw pattern: horizontal advection, freshwater fluxes and vertical mixing in most regions, CO2 fluxes south of 40°N, and biological production in the subarctic.
- Published
- 2014
48. Global Carbon Budget 2016
- Author
-
Ian Harris, Richard A. Houghton, Josep G. Canadell, Pieter P. Tans, Abdirahman M Omar, Thomas A. Boden, Leticia Barbero, Arne Körtzinger, Adrienne J. Sutton, Guido R. van der Werf, Frank J. Millero, Benjamin D. Stocker, Julia E. M. S. Nabel, Louise Chini, Denis Pierrot, Scott C. Doney, Shin-Ichiro Nakaoka, Andrew Lenton, Kim I. Currie, Nicolas Viovy, Pedro M. S. Monteiro, Sönke Zaehle, Oliver Andrews, Philippe Ciais, Peter Landschützer, Ute Schuster, Stephen Sitch, Pierre Friedlingstein, Vanessa Haverd, Simone R. Alin, Judith Hauck, Christian Rödenbeck, Atul K. Jain, Nathalie Lefèvre, Ingrid T. van der Laan-Luijkx, Joe R. Melton, Mario Hoppema, Benjamin Poulter, Frédéric Chevallier, Taro Takahashi, Hanqin Tian, Thanos Gkritzalis, Tsuneo Ono, Etsushi Kato, Andrew C. Manning, Roland Séférian, Danica Lombardozzi, Jörg Schwinger, Jan Ivar Korsbakken, David R. Munro, Corinne Le Quéré, Anthony P. Walker, Laurent Bopp, Peter Anthoni, Bronte Tilbrook, Glen P. Peters, Andy Wiltshire, Sebastian Lienert, Are Olsen, Ralph F. Keeling, Nicolas Metzl, Robbie M. Andrew, Christine Delire, Joe Salisbury, Kees Klein Goldewijk, K. O'Brien, Ingunn Skjelvan, Tyndall Centre for Climate Change Research, University of East Anglia [Norwich] (UEA), Center for International Climate and Environmental Research [Oslo] (CICERO), University of Oslo (UiO), Global Carbon Project (GCP), CSIRO Marine and Atmospheric Research (CSIRO-MAR), Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO)-Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), College of Life and Environmental Sciences, University of Exeter, Centre for Ocean and Atmospheric Sciences [Norwich] (COAS), School of Environmental Sciences [Norwich], University of East Anglia [Norwich] (UEA)-University of East Anglia [Norwich] (UEA), Oak Ridge National Laboratory [Oak Ridge] (ORNL), UT-Battelle, LLC, NOAA Earth System Research Laboratory (ESRL), National Oceanic and Atmospheric Administration (NOAA), Woods Hole Oceanographic Institution (WHOI), University of California [San Diego] (UC San Diego), University of California, NOAA Pacific Marine Environmental Laboratory [Seattle] (PMEL), Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology (KIT), NOAA Atlantic Oceanographic and Meteorological Laboratory (AOML), Cooperative Institute for Marine and Atmospheric Studies (CIMAS), Rosenstiel School of Marine and Atmospheric Science (RSMAS), University of Miami [Coral Gables]-University of Miami [Coral Gables], Laboratoire des Sciences du Climat et de l'Environnement [Gif-sur-Yvette] (LSCE), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Modélisation INVerse pour les mesures atmosphériques et SATellitaires (SATINV), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Department of Geographical Sciences, University of Maryland [College Park], University of Maryland System-University of Maryland System, ICOS-ATC (ICOS-ATC), National Institute of Water and Atmospheric Research [Wellington] (NIWA), Groupe d'étude de l'atmosphère météorologique (CNRM-GAME), Institut national des sciences de l'Univers (INSU - CNRS)-Météo France-Centre National de la Recherche Scientifique (CNRS), College of Engineering, Mathematics and Physical Sciences [Exeter] (EMPS), University of Exeter, Flanders Marine Institute, VLIZ, Climatic Research Unit, University of East Anglia, Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung (AWI), Commonwealth Scientific and Industrial Research Organisation (CSIRO), Oceans and Atmosphere Flagship, PBL Netherlands Environmental Assessment Agency, STMicroelectronics [Crolles] (ST-CROLLES), The Institute of Applied Energy (IAE), Christian-Albrechts-Universität zu Kiel (CAU), Helmholtz Centre for Ocean Research [Kiel] (GEOMAR), Max-Planck-Institut für Meteorologie (MPI-M), Max-Planck-Gesellschaft, Austral, Boréal et Carbone (ABC), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Muséum national d'Histoire naturelle (MNHN)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Oceans and Atmosphere Flagship (CSIRO), CSIRO Oceans and Atmosphere Flagship, Équipe CO2 (E-CO2), Department of Ocean Sciences, University of Miami [Coral Gables], Department of Civil and Environmental Engineering [Berkeley] (CEE), University of California [Berkeley], University of California-University of California, University of Wisconsin Whitewater, Max Planck Institute for Meteorology (MPI-M), National Institute for Environmental Studies (NIES), NASA Langley Research Center [Hampton] (LaRC), National Institute of Advanced Industrial Science and Technology (AIST), Entrepôts, Représentation et Ingénierie des Connaissances (ERIC), Université Lumière - Lyon 2 (UL2)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon, Max-Planck-Institut, Ocean Process Analysis Laboratory (OPAL), University of New Hampshire (UNH), Bjerknes Centre for Climate Research (BCCR), Department of Biological Sciences [Bergen] (BIO / UiB), University of Bergen (UiB)-University of Bergen (UiB), Imperial College London, Scripps Institution of Oceanography (SIO), Joint Institute for the Study of the Atmosphere and Ocean (JISAO), University of Washington [Seattle], Institute of Space and Astronautical Science (ISAS), Japan Aerospace Exploration Agency [Sagamihara] (JAXA), Shandong Agricultural University (SDAU), Commonwealth Scientific and Industrial Research Organisation [Canberra] (CSIRO), Wageningen University and Research [Wageningen] (WUR), Faculty of Earth and Life Sciences [Amsterdam] (FALW), Vrije Universiteit Amsterdam [Amsterdam] (VU), Modélisation des Surfaces et Interfaces Continentales (MOSAIC), School of Earth and Environment [Leeds] (SEE), University of Leeds, Met Office Hadley Centre for Climate Change (MOHC), United Kingdom Met Office [Exeter], Biogeochemical Systems Department [Jena], Max Planck Institute for Biogeochemistry (MPI-BGC), Max-Planck-Gesellschaft-Max-Planck-Gesellschaft, Environmental Sciences, Faculty of Earth and Life Sciences, Earth and Climate, University of California (UC), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Centre national de recherches météorologiques (CNRM), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), University of California [Berkeley] (UC Berkeley), University of California (UC)-University of California (UC), and Scripps Institution of Oceanography (SIO - UC San Diego)
- Subjects
Meteorologie en Luchtkwaliteit ,010504 meteorology & atmospheric sciences ,Meteorology and Air Quality ,530 Physics ,Climate change ,[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] ,02 engineering and technology ,010501 environmental sciences ,Atmospheric sciences ,01 natural sciences ,7. Clean energy ,Carbon cycle ,Latitude ,SDG 17 - Partnerships for the Goals ,Deforestation ,ddc:550 ,SDG 13 - Climate Action ,Life Science ,lcsh:Environmental sciences ,ComputingMilieux_MISCELLANEOUS ,0105 earth and related environmental sciences ,lcsh:GE1-350 ,WIMEK ,business.industry ,Fossil fuel ,lcsh:QE1-996.5 ,Biosphere ,Vegetation ,15. Life on land ,021001 nanoscience & nanotechnology ,lcsh:Geology ,Earth sciences ,13. Climate action ,General Earth and Planetary Sciences ,Environmental science ,Sink (computing) ,0210 nano-technology ,business - Abstract
Accurate assessment of anthropogenic carbon dioxide (CO2) emissions and their redistribution among the atmosphere, ocean, and terrestrial biosphere – the “global carbon budget” – is important to better understand the global carbon cycle, support the development of climate policies, and project future climate change. Here we describe data sets and methodology to quantify all major components of the global carbon budget, including their uncertainties, based on the combination of a range of data, algorithms, statistics, and model estimates and their interpretation by a broad scientific community. We discuss changes compared to previous estimates and consistency within and among components, alongside methodology and data limitations. CO2 emissions from fossil fuels and industry (EFF) are based on energy statistics and cement production data, respectively, while emissions from land-use change (ELUC), mainly deforestation, are based on combined evidence from land-cover change data, fire activity associated with deforestation, and models. The global atmospheric CO2 concentration is measured directly and its rate of growth (GATM) is computed from the annual changes in concentration. The mean ocean CO2 sink (SOCEAN) is based on observations from the 1990s, while the annual anomalies and trends are estimated with ocean models. The variability in SOCEAN is evaluated with data products based on surveys of ocean CO2 measurements. The global residual terrestrial CO2 sink (SLAND) is estimated by the difference of the other terms of the global carbon budget and compared to results of independent dynamic global vegetation models. We compare the mean land and ocean fluxes and their variability to estimates from three atmospheric inverse methods for three broad latitude bands. All uncertainties are reported as ±1σ, reflecting the current capacity to characterise the annual estimates of each component of the global carbon budget. For the last decade available (2006–2015), EFF was 9.3 ± 0.5 GtC yr−1, ELUC 1.0 ± 0.5 GtC yr−1, GATM 4.5 ± 0.1 GtC yr−1, SOCEAN 2.6 ± 0.5 GtC yr−1, and SLAND 3.1 ± 0.9 GtC yr−1. For year 2015 alone, the growth in EFF was approximately zero and emissions remained at 9.9 ± 0.5 GtC yr−1, showing a slowdown in growth of these emissions compared to the average growth of 1.8 % yr−1 that took place during 2006–2015. Also, for 2015, ELUC was 1.3 ± 0.5 GtC yr−1, GATM was 6.3 ± 0.2 GtC yr−1, SOCEAN was 3.0 ± 0.5 GtC yr−1, and SLAND was 1.9 ± 0.9 GtC yr−1. GATM was higher in 2015 compared to the past decade (2006–2015), reflecting a smaller SLAND for that year. The global atmospheric CO2 concentration reached 399.4 ± 0.1 ppm averaged over 2015. For 2016, preliminary data indicate the continuation of low growth in EFF with +0.2 % (range of −1.0 to +1.8 %) based on national emissions projections for China and USA, and projections of gross domestic product corrected for recent changes in the carbon intensity of the economy for the rest of the world. In spite of the low growth of EFF in 2016, the growth rate in atmospheric CO2 concentration is expected to be relatively high because of the persistence of the smaller residual terrestrial sink (SLAND) in response to El Niño conditions of 2015–2016. From this projection of EFF and assumed constant ELUC for 2016, cumulative emissions of CO2 will reach 565 ± 55 GtC (2075 ± 205 GtCO2) for 1870–2016, about 75 % from EFF and 25 % from ELUC. This living data update documents changes in the methods and data sets used in this new carbon budget compared with previous publications of this data set (Le Quéré et al., 2015b, a, 2014, 2013). All observations presented here can be downloaded from the Carbon Dioxide Information Analysis Center (doi:10.3334/CDIAC/GCP_2016).
- Published
- 2016
49. Decadal Vision in Oceanography (II)
- Author
-
Hiroshi Ogawa, Masahiro Suzumura, Tsuneo Ono, Masao Ishii, Jota Kanda, Michiyo Yamamoto-Kawai, Yutaka W. Watanabe, Hajime Obata, Youhei Yamashita, and Makio C. Honda
- Subjects
Engineering ,Thesaurus (information retrieval) ,business.industry ,Immunology and Allergy ,Library science ,business ,Chemical oceanography - Published
- 2013
50. Radiocesium concentrations and body size of largemouth bass, Micropterus salmoides (Lacépède, 1802), and smallmouth bass, M . dolomieu Lacépède, 1802, in Lake Hayama, Japan
- Author
-
K. Matsuda, Tomowo Watanabe, M. Enomoto, K. Uchida, Tsuneo Ono, Takami Morita, Ken Fujimoto, A. Tomiya, K. Takagi, Y. Shigenobu, and S. Yamamoto
- Subjects
Fishery ,Bass (sound) ,biology ,Micropterus ,Aquatic Science ,Body size ,biology.organism_classification - Published
- 2015
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