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252. Autumn CO2chemistry in the Japan Sea and the impact of discharges from the Changjiang River

Author

Kosugi, Naohiro, Sasano, Daisuke, Ishii, Masao, Enyo, Kazutaka, and Saito, Shu

Abstract

We made comprehensive surface water CO2chemistry observations in the Japan Sea during each autumn from 2010 to 2014. The partial pressure of CO2(pCO2) in surface water, 312–329 μatm, was 10–30 μatm lower in the Japan Sea than in the same latitude range of the western North Pacific adjacent to Japan. According to the sensitivity analysis of pCO2, the lower pCO2in the Japan Sea was primarily attributable to a large seasonal decrease of pCO2associated with strong cooling in autumn, particularly in the northern Japan Sea. In contrast, the lower pCO2in relatively warm, freshwater in the southern Japan Sea was attributable to not only the thermodynamic effect of the temperature changes but also high total alkalinity. This alkalinity had its origin in Changjiang River and was transported by Changjiang diluted water (CDW) which seasonally runs into the Japan Sea from the East China Sea. The input of total alkalinity through CDW also elevated the saturation state of calcium carbonate minerals and mitigated the effects of anthropogenic ocean acidification, at least during autumn. These biogeochemical impacts of CDW in the Japan Sea last until November, although the inflow from the East China Sea to the Japan Sea almost ceases by the end of September. The long duration of the high saturation state of calcium carbonate benefits calcareous marine organisms. Autumn pCO2is lower in the Japan Sea than in the western North Pacific in the same seasonInput of alkalinity from the Changjiang has contributed greatly to pCO2lowering in the Japan SeaAcidification in the southern Japan Sea is mitigated seasonally by the increase of alkalinity

Published
2016
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253. The international at-sea intercomparison of fCO2 systems during the R/V Meteor Cruise 36/1 in the North Atlantic Ocean

Author

Körtzinger, Arne, primary, Mintrop, Ludger, additional, Wallace, Douglas W.R, additional, Johnson, Kenneth M, additional, Neill, Craig, additional, Tilbrook, Bronte, additional, Towler, Philip, additional, Inoue, Hisayuki Y, additional, Ishii, Masao, additional, Shaffer, Gary, additional, Torres Saavedra, Rodrigo F, additional, Ohtaki, Eiji, additional, Yamashita, Eiji, additional, Poisson, Alain, additional, Brunet, Christian, additional, Schauer, Bernard, additional, Goyet, Catherine, additional, and Eischeid, Greg, additional

Published
2000
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261. Factors Related to Impairment of Activities of Daily Living.

Author

KAMIYAMA, Tomomasa, primary, MURATANI, Hiromi, additional, KIMURA, Yorio, additional, FUKIYAMA, Koshiro, additional, ABE, Keishi, additional, FUJII, Jun, additional, KUWAJIMA, Iwao, additional, ISHII, Masao, additional, SHIOMI, Toshiaki, additional, KAWANO, Yuhei, additional, MIKAMI, Hiroshi, additional, IBAYASHI, Setsuro, additional, and OMAE, Teruo, additional

Published
1999
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265. Mechanism of Angiotensin II-mediated Regulation of Fibronectin Gene in Rat Vascular Smooth Muscle Cells

Author

Tamura, Kouichi, primary, Nyui, Nobuo, additional, Tamura, Nobuko, additional, Fujita, Takayuki, additional, Kihara, Minoru, additional, Toya, Yoshiyuki, additional, Takasaki, Izumi, additional, Takagi, Nobuyoshi, additional, Ishii, Masao, additional, Oda, Kin-ichiro, additional, Horiuchi, Masatsugu, additional, and Umemura, Satoshi, additional

Published
1998
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267. Endothelial Nitric Oxide Synthase Gene Polymorphism and Acute Myocardial Infarction

Author

Hibi, Kiyoshi, primary, Ishigami, Tomoaki, additional, Tamura, Kouichi, additional, Mizushima, Shunsaku, additional, Nyui, Nobuo, additional, Fujita, Takayuki, additional, Ochiai, Hisao, additional, Kosuge, Masami, additional, Watanabe, Yasujirou, additional, Yoshii, Yuzuru, additional, Kihara, Minoru, additional, Kimura, Kazuo, additional, Ishii, Masao, additional, and Umemura, Satoshi, additional

Published
1998
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268. Effect of Genetic Deficiency of Angiotensinogen on the Renin-Angiotensin System

Author

Tamura, Kouichi, primary, Umemura, Satoshi, additional, Sumida, Yoichi, additional, Nyui, Nobuo, additional, Kobayashi, Shun-ichi, additional, Ishigami, Tomoaki, additional, Kihara, Minoru, additional, Sugaya, Takeshi, additional, Fukamizu, Akiyoshi, additional, Miyazaki, Hitoshi, additional, Murakami, Kazuo, additional, and Ishii, Masao, additional

Published
1998
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273. Endocrinological abnormalities in angiotensinogen-gene knockout mice

Author

Umemura, Satoshi, primary, Kihara, Minoru, additional, Sumida, Youichi, additional, Yabana, Machiko, additional, Ishigami, Tomoaki, additional, Tamura, Kouichi, additional, Nyui, Nobuo, additional, Hibi, Kiyoshi, additional, Murakami, Kazuo, additional, Fukamizu, Akiyoshi, additional, and Ishii, Masao, additional

Published
1998
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277. Increased Cardiac Angiotensin II Receptors in Angiotensinogen-Deficient Mice

Author

Sumida, Yoichi, primary, Umemura, Satoshi, additional, Tamura, Kouichi, additional, Kihara, Minoru, additional, Kobayashi, Shun-ichi, additional, Ishigami, Tomoaki, additional, Yabana, Machiko, additional, Nyui, Nobuo, additional, Ochiai, Hisao, additional, Fukamizu, Akiyoshi, additional, Miyazaki, Hitoshi, additional, Murakami, Kazuo, additional, and Ishii, Masao, additional

Published
1998
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281. Meridional Variability in Multi‐Decadal Trends of Dissolved Inorganic Carbon in Surface Seawater of the Western North Pacific Along the 165°E Line

Author

Ono, Hisashi, Toyama, Katsuya, Enyo, Kazutaka, Iida, Yosuke, Sasano, Daisuke, Nakaoka, Shin‐Ichiro, and Ishii, Masao

Abstract

Multi‐decadal trends of the total dissolved inorganic carbon (DIC) concentrations and consequent ocean acidification in surface seawater were investigated on the basis of data from shipboard measurements conducted since 1996 along the 165°E repeat line in the western North Pacific. The observed trends exhibited clear meridional variabilities, with higher rates in the subtropical and tropical zones and lower rates in the subarctic zone, with a DIC range from +0.09 ± 0.14 to +1.64 ± 0.16 μmol kg−1yr−1and pH range from −0.0023 ± 0.0034 to −0.0281 ± 0.0059 decade−1. DIC and acidification trends were consistent with those expected from the atmospheric CO2concentrations at nearly all latitudinal zones, but were significantly different at some latitudes. We attribute the significantly lower rates observed in the central western Subarctic Gyre and southern Subtropical Gyres primarily to the variabilities in upward DIC supply from the subsurface associated with the variability in ocean circulation. However, the higher rate observed to the south of the Kuroshio Extension appears to have been caused by the change in winter vertical mixing related to the change in its stable/unstable paths. CO2uptake by the ocean leads to a change in the state of CO2chemistry in seawater, commonly referred to as “ocean acidification,” and also plays an important role in mitigating global warming by reducing the atmospheric CO2concentration. To project future ocean acidification under different socio‐economic scenarios, we need to understand the current trends in oceanic CO2concentrations and acidification and the impact of climate change on these trends. Based on the data obtained from shipboard observations extending from the subarctic to equatorial zones in the western North Pacific over the last 25 years, we observed a clear meridional variability in ocean acidification trends, which was generally consistent with the trends expected from the increase in the atmospheric CO2concentration. However, in some regions, the trends in oceanic CO2concentration and acidification in surface seawater are likely influenced by the temporal variability in ocean circulation, in addition to the atmospheric CO2. These results suggest that the sensitivity of ocean acidification trends to climate change varies greatly between oceanic regions within the western North Pacific. Meridional variability was found in the trends of dissolved inorganic carbon in the surface layer along the 165°E repeat lineExtremely slow rates of increase observed in the subarctic and tropics are attributed to ocean circulation variabilityA fast increase in the south of the Kuroshio Extension is likely associated with the variability in its path Meridional variability was found in the trends of dissolved inorganic carbon in the surface layer along the 165°E repeat line Extremely slow rates of increase observed in the subarctic and tropics are attributed to ocean circulation variability A fast increase in the south of the Kuroshio Extension is likely associated with the variability in its path

Published
2023
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286. Angiotensin-Converting Enzyme Gene Polymorphism Adds Risk for the Severity of Coronary Atherosclerosis in Smokers

Author

Hibi, Kiyoshi, primary, Ishigami, Tomoaki, additional, Kimura, Kazuo, additional, Nakao, Masayuki, additional, Iwamoto, Tamio, additional, Tamura, Kouichi, additional, Nemoto, Toyoji, additional, Shimizu, Tomoaki, additional, Mochida, Yasuyuki, additional, Ochiai, Hisao, additional, Umemura, Satoshi, additional, and Ishii, Masao, additional

Published
1997
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287. Angiotensin-Converting Enzyme Gene I/D Polymorphism and Carotid Plaques in Japanese

Author

Watanabe, Yasujirou, primary, Ishigami, Tomoaki, additional, Kawano, Yoshiyuki, additional, Umahara, Takahiko, additional, Nakamori, Akitoshi, additional, Mizushima, Shunsaku, additional, Hibi, Kiyoshi, additional, Kobayashi, Izumi, additional, Tamura, Kouichi, additional, Ochiai, Hisao, additional, Umemura, Satoshi, additional, and Ishii, Masao, additional

Published
1997
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291. Stretch-Induced Map Kinase Activation in Cardiomyocytes of Angiotensinogen-Deficient Mice

Author

Nyui, Nobuo, primary, Tamura, Kouichi, additional, Mizuno, Keiko, additional, Ishigami, Tomoaki, additional, Hibi, Kiyoshi, additional, Yabana, Machiko, additional, Kihara, Minoru, additional, Fukamizu, Akiyoshi, additional, Ochiai, Hisao, additional, Umemura, Satoshi, additional, Murakami, Kazuo, additional, Ohno, Shigeo, additional, and Ishii, Masao, additional

Published
1997
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292. Relationship between hepatic angiotensinogen mRNA expression and plasma angiotensinogen in patients with chronic hepatitis

Author

Takahashi, Daisukc, primary, Tamura, Kouichi, additional, Ushikubo, Toshiaki, additional, Moriya, Akihiko, additional, Yokoyama, Nobuyuki, additional, Nyui, Nobuo, additional, Chiba, Eiko, additional, Hibi, Kiyoshi, additional, Ishigami, Tomoaki, additional, Yabana, Machiko, additional, Tomiyama, Masakazu, additional, Umemura, Satoshi, additional, and Ishii, Masao, additional

Published
1997
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295. Resistance of anemia to rHuEPO therapy in a hemodialysis patient with cervical lymph node tuberculosis.

Author

Yabana, Machiko, primary, Kurita, Kazuo, additional, Watanabe, Jun, additional, Takagi, Nobuyoshi, additional, Kihara, Minoru, additional, Tamura, Kouichi, additional, Yamaguchi, Satoshi, additional, Minamisawa, Mayumi, additional, Yano, Takahiko, additional, Maemoto, Satoko, additional, Toya, Yoshiyuki, additional, Umemura, Satoshi, additional, and Ishii, Masao, additional

Published
1997
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