107 results on '"Müller, Jens Daniel"'
Search Results
2. An Assessment of CO2 Storage and Sea‐Air Fluxes for the Atlantic Ocean and Mediterranean Sea Between 1985 and 2018
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Agencia Estatal de Investigación (España), European Commission, Research Council of Norway, Bjerknes Centre for Climate Research, Helmholtz Association, National Oceanic and Atmospheric Administration (US), Pérez, Fiz F. [0000-0003-4836-8974], Becker, Meike [0000-0001-7650-0923], Goris, Nadine [0000-0002-0087-6534], Gehlen, Marion [0000-0002-9688-0692], López-Mozos, Marta [0000-0002-5501-1095], Tjiputra, Jerry [0000-0002-4600-2453], Olsen, Are [0000-0003-1696-9142], Müller, Jens Daniel [0000-0003-3137-0883], Huertas, I. Emma [0000-0003-1033-7937], Chau, Thi-Tuyet-Trang [0000-0003-0102-7427], Caínzos, Verónica [0000-0003-2666-1862], Velo, A. [0000-0002-7598-5700], Hauck, Judith [0000-0003-4723-9652], Gruber, Nicolas [0000-0002-2085-2310], Wanninkhof, Rik [0000-0003-1973-3514], Pérez, Fiz F., Becker, Meike, Goris, Nadine, Gehlen, Marion, López-Mozos, Marta, Tjiputra, Jerry, Olsen, Are, Müller, Jens Daniel, Huertas, I. Emma, Chau, Thi-Tuyet-Trang, Caínzos, Verónica, Velo, A., Bernard, G., Hauck, Judith, Gruber, Nicolas, Wanninkhof, Rik, Agencia Estatal de Investigación (España), European Commission, Research Council of Norway, Bjerknes Centre for Climate Research, Helmholtz Association, National Oceanic and Atmospheric Administration (US), Pérez, Fiz F. [0000-0003-4836-8974], Becker, Meike [0000-0001-7650-0923], Goris, Nadine [0000-0002-0087-6534], Gehlen, Marion [0000-0002-9688-0692], López-Mozos, Marta [0000-0002-5501-1095], Tjiputra, Jerry [0000-0002-4600-2453], Olsen, Are [0000-0003-1696-9142], Müller, Jens Daniel [0000-0003-3137-0883], Huertas, I. Emma [0000-0003-1033-7937], Chau, Thi-Tuyet-Trang [0000-0003-0102-7427], Caínzos, Verónica [0000-0003-2666-1862], Velo, A. [0000-0002-7598-5700], Hauck, Judith [0000-0003-4723-9652], Gruber, Nicolas [0000-0002-2085-2310], Wanninkhof, Rik [0000-0003-1973-3514], Pérez, Fiz F., Becker, Meike, Goris, Nadine, Gehlen, Marion, López-Mozos, Marta, Tjiputra, Jerry, Olsen, Are, Müller, Jens Daniel, Huertas, I. Emma, Chau, Thi-Tuyet-Trang, Caínzos, Verónica, Velo, A., Bernard, G., Hauck, Judith, Gruber, Nicolas, and Wanninkhof, Rik
- Abstract
As part of the second phase of the Regional Carbon Cycle Assessment and Processes project (RECCAP2), we present an assessment of the carbon cycle of the Atlantic Ocean, including the Mediterranean Sea, between 1985 and 2018 using global ocean biogeochemical models (GOBMs) and estimates based on surface ocean carbon dioxide (CO2) partial pressure (pCO2 products) and ocean interior dissolved inorganic carbon observations. Estimates of the basin-wide long-term mean net annual CO2 uptake based on GOBMs and pCO2 products are in reasonable agreement (−0.47 ± 0.15 PgC yr−1 and −0.36 ± 0.06 PgC yr−1, respectively), with the higher uptake in the GOBM-based estimates likely being a consequence of a deficit in the representation of natural outgassing of land derived carbon. In the GOBMs, the CO2 uptake increases with time at rates close to what one would expect from the atmospheric CO2 increase, but pCO2 products estimate a rate twice as fast. The largest disagreement in the CO2 flux between GOBMs and pCO2 products is found north of 50°N, coinciding with the largest disagreement in the seasonal cycle and interannual variability. The mean accumulation rate of anthropogenic CO2 (Cant) over 1994–2007 in the Atlantic Ocean is 0.52 ± 0.11 PgC yr−1 according to the GOBMs, 28% ± 20% lower than that derived from observations. Around 70% of this Cant is taken up from the atmosphere, while the remainder is imported from the Southern Ocean through lateral transport
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- 2024
3. Assessment of Global Ocean Biogeochemistry Models for Ocean Carbon Sink Estimates in RECCAP2 and Recommendations for Future Studies
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European Commission, Woods Hole Oceanographic Institution, Swiss National Science Foundation, Norwegian Research Council, Ministerio de Ciencia e Innovación (España), Consejo Superior de Investigaciones Científicas (España), Helmholtz Association, Terhaar, Jens [0000-0001-9377-415X], Goris, Nadine [0000-0002-0087-6534], Müller, Jens Daniel [0000-0003-3137-0883], Devries, Timothy [0000-0002-7771-9430], Gruber, Nicolas [0000-0002-2085-2310], Hauck, Judith [0000-0003-4723-9652], Pérez, Fiz F. [0000-0003-4836-8974], Séférian, Roland [0000-0002-2571-2114], Terhaar, Jens, Goris, Nadine, Müller, Jens Daniel, Devries, Timothy, Gruber, Nicolas, Hauck, Judith, Pérez, Fiz F., Séférian, Roland, European Commission, Woods Hole Oceanographic Institution, Swiss National Science Foundation, Norwegian Research Council, Ministerio de Ciencia e Innovación (España), Consejo Superior de Investigaciones Científicas (España), Helmholtz Association, Terhaar, Jens [0000-0001-9377-415X], Goris, Nadine [0000-0002-0087-6534], Müller, Jens Daniel [0000-0003-3137-0883], Devries, Timothy [0000-0002-7771-9430], Gruber, Nicolas [0000-0002-2085-2310], Hauck, Judith [0000-0003-4723-9652], Pérez, Fiz F. [0000-0003-4836-8974], Séférian, Roland [0000-0002-2571-2114], Terhaar, Jens, Goris, Nadine, Müller, Jens Daniel, Devries, Timothy, Gruber, Nicolas, Hauck, Judith, Pérez, Fiz F., and Séférian, Roland
- Abstract
The ocean is a major carbon sink and takes up 25%–30% of the anthropogenically emitted CO2. A state-of-the-art method to quantify this sink are global ocean biogeochemistry models (GOBMs), but their simulated CO2 uptake differs between models and is systematically lower than estimates based on statistical methods using surface ocean pCO2 and interior ocean measurements. Here, we provide an in-depth evaluation of ocean carbon sink estimates from 1980 to 2018 from a GOBM ensemble. As sources of inter-model differences and ensemble-mean biases our study identifies (a) the model setup, such as the length of the spin-up, the starting date of the simulation, and carbon fluxes from rivers and into sediments, (b) the simulated ocean circulation, such as Atlantic Meridional Overturning Circulation and Southern Ocean mode and intermediate water formation, and (c) the simulated oceanic buffer capacity. Our analysis suggests that a late starting date and biases in the ocean circulation cause a too low anthropogenic CO2 uptake across the GOBM ensemble. Surface ocean biogeochemistry biases might also cause simulated anthropogenic fluxes to be too low, but the current setup prevents a robust assessment. For simulations of the ocean carbon sink, we recommend in the short-term to (a) start simulations at a common date before the industrialization and the associated atmospheric CO2 increase, (b) conduct a sufficiently long spin-up such that the GOBMs reach steady-state, and (c) provide key metrics for circulation, biogeochemistry, and the land-ocean interface. In the long-term, we recommend improving the representation of these metrics in the GOBMs
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- 2024
4. The annual update GLODAPv2.2023: the global interior ocean biogeochemical data product
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Lauvset, Siv K., primary, Lange, Nico, additional, Tanhua, Toste, additional, Bittig, Henry C., additional, Olsen, Are, additional, Kozyr, Alex, additional, Álvarez, Marta, additional, Azetsu-Scott, Kumiko, additional, Brown, Peter J., additional, Carter, Brendan R., additional, Cotrim da Cunha, Leticia, additional, Hoppema, Mario, additional, Humphreys, Matthew P., additional, Ishii, Masao, additional, Jeansson, Emil, additional, Murata, Akihiko, additional, Müller, Jens Daniel, additional, Pérez, Fiz F., additional, Schirnick, Carsten, additional, Steinfeldt, Reiner, additional, Suzuki, Toru, additional, Ulfsbo, Adam, additional, Velo, Anton, additional, Woosley, Ryan J., additional, and Key, Robert M., additional
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- 2024
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5. A Synthesis of Global Coastal Ocean Greenhouse Gas Fluxes
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Resplandy, Laure LR, Hogikyan, A., Müller, Jens Daniel, Najjar, Raymond R.G., Hermann, W. Bange, Bianchi, Daniele, Weber, T., Cai, Wei-Jun, Doney, S. C., Fennel, Katja, Gehlen, Marion, Hauck, J., Lacroix, Fabrice, Landschutzer, Peter, Le Quéré, Corinne, Roobaert, Alizée, Schwinger, J., Berthet, Sarah, Bopp, Laurent, Chau, Thi T. T., Dai, Minhan, Gruber, Nicolas, Ilyina, Tatiana, Kock, A., Manizza, M., Lachkar, Z., Laruelle, Goulven Gildas, Liao, Enhui EL, Lima, I. D., Nissen, C, Rödenbeck, Christian, Séférian, Roland, Toyama, K., Tsujino, H., Regnier, Pierre A.G., Resplandy, Laure LR, Hogikyan, A., Müller, Jens Daniel, Najjar, Raymond R.G., Hermann, W. Bange, Bianchi, Daniele, Weber, T., Cai, Wei-Jun, Doney, S. C., Fennel, Katja, Gehlen, Marion, Hauck, J., Lacroix, Fabrice, Landschutzer, Peter, Le Quéré, Corinne, Roobaert, Alizée, Schwinger, J., Berthet, Sarah, Bopp, Laurent, Chau, Thi T. T., Dai, Minhan, Gruber, Nicolas, Ilyina, Tatiana, Kock, A., Manizza, M., Lachkar, Z., Laruelle, Goulven Gildas, Liao, Enhui EL, Lima, I. D., Nissen, C, Rödenbeck, Christian, Séférian, Roland, Toyama, K., Tsujino, H., and Regnier, Pierre A.G.
- Abstract
The coastal ocean contributes to regulating atmospheric greenhouse gas concentrations by taking up carbon dioxide (CO2) and releasing nitrous oxide (N2O) and methane (CH4). In this second phase of the Regional Carbon Cycle Assessment and Processes (RECCAP2), we quantify global coastal ocean fluxes of CO2, N2O and CH4 using an ensemble of global gap-filled observation-based products and ocean biogeochemical models. The global coastal ocean is a net sink of CO2 in both observational products and models, but the magnitude of the median net global coastal uptake is ∼60% larger in models (−0.72 vs. −0.44 PgC year−1, 1998–2018, coastal ocean extending to 300 km offshore or 1,000 m isobath with area of 77 million km2). We attribute most of this model-product difference to the seasonality in sea surface CO2 partial pressure at mid- and high-latitudes, where models simulate stronger winter CO2 uptake. The coastal ocean CO2 sink has increased in the past decades but the available time-resolving observation-based products and models show large discrepancies in the magnitude of this increase. The global coastal ocean is a major source of N2O (+0.70 PgCO2-e year−1 in observational product and +0.54 PgCO2-e year−1 in model median) and CH4 (+0.21 PgCO2-e year−1 in observational product), which offsets a substantial proportion of the coastal CO2 uptake in the net radiative balance (30%–60% in CO2-equivalents), highlighting the importance of considering the three greenhouse gases when examining the influence of the coastal ocean on climate., info:eu-repo/semantics/published
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- 2024
6. The annual update GLODAPv2.2023: the global interior ocean biogeochemical data product
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European Commission, Norwegian Research Centre, Universidade Federal do Rio de Janeiro, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), CSIC - Instituto Español de Oceanografía (IEO), Ministerio de Ciencia e Innovación (España), National Oceanic and Atmospheric Administration (US), Swedish Research Council for Sustainable Development, University of Maryland, National Science Foundation (US), Environmental Restoration and Conservation Agency (Japan), Helmholtz Association, Lauvset, Siv K., Lange, Nico, Tanhua, Toste, Bittig, Henry C., Olsen, Are, Kozyr, Alex, Álvarez-Rodríguez, Marta, Azetsu-Scott, Kumiko, Brown, Peter J., Carter, Brendan R., Cotrim da Cunha, Leticia, Hoppema, Mario, Humphreys, Matthew P., Ishii, Masao, Jeansson, Emil, Murata, Akihiko, Müller, Jens Daniel, Pérez, Fiz F., Schirnick, Carsten, Steinfeldt, Reiner, Suzuki, Toru, Ulfsbo, Adam, Velo, A., Woosley, Ryan J., Key, Robert M., European Commission, Norwegian Research Centre, Universidade Federal do Rio de Janeiro, Conselho Nacional de Desenvolvimento Científico e Tecnológico (Brasil), CSIC - Instituto Español de Oceanografía (IEO), Ministerio de Ciencia e Innovación (España), National Oceanic and Atmospheric Administration (US), Swedish Research Council for Sustainable Development, University of Maryland, National Science Foundation (US), Environmental Restoration and Conservation Agency (Japan), Helmholtz Association, Lauvset, Siv K., Lange, Nico, Tanhua, Toste, Bittig, Henry C., Olsen, Are, Kozyr, Alex, Álvarez-Rodríguez, Marta, Azetsu-Scott, Kumiko, Brown, Peter J., Carter, Brendan R., Cotrim da Cunha, Leticia, Hoppema, Mario, Humphreys, Matthew P., Ishii, Masao, Jeansson, Emil, Murata, Akihiko, Müller, Jens Daniel, Pérez, Fiz F., Schirnick, Carsten, Steinfeldt, Reiner, Suzuki, Toru, Ulfsbo, Adam, Velo, A., Woosley, Ryan J., and Key, Robert M.
- Abstract
The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort providing regular compilations of surface to bottom ocean biogeochemical bottle data, with an emphasis on seawater inorganic carbon chemistry and related variables determined through chemical analysis of seawater samples. GLODAPv2.2023 is an update of the previous version, GLODAPv2.2022 (Lauvset et al., 2022). The major changes are as follows: data from 23 new cruises were added. In addition, a number of changes were made to the data included in GLODAPv2.2022. GLODAPv2.2023 includes measurements from more than 1.4 million water samples from the global oceans collected on 1108 cruises. The data for the now 13 GLODAP core variables (salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon, total alkalinity, pH, chlorofluorocarbon-11 (CFC-11), CFC-12, CFC-113, CCl4, and SF6) have undergone extensive quality control with a focus on the systematic evaluation of bias. The data are available in two formats: (i) as submitted by the data originator but converted to World Ocean Circulation Experiment (WOCE) exchange format and (ii) as a merged data product with adjustments applied to minimize bias. For the present annual update, adjustments for the 23 new cruises were derived by comparing those data with the data from the 1085 quality-controlled cruises in the GLODAPv2.2022 data product using crossover analysis. SF6 data from all cruises were evaluated by comparison with CFC-12 data measured on the same cruises. For nutrients and ocean carbon dioxide (CO2), chemistry comparisons to estimates based on empirical algorithms provided additional context for adjustment decisions. The adjustments that we applied are intended to remove potential biases from errors related to measurement, calibration, and data-handling practices without removing known or likely time trends or variations in the variables evaluated. The compiled and adjusted data product is believed to be consistent to better than 0.
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- 2024
7. The annual update GLODAPv2.2023: the global interior ocean biogeochemical data product
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Lauvset, Siv K., Lange, Nico, Tanhua, Toste, Bittig, Henry C., Olsen, Are, Kozyr, Alex, Álvarez, Marta, Azetsu-Scott, Kumiko, Brown, Peter J., Carter, Brendan R., Cotrim da Cunha, Leticia, Hoppema, Mario, Humphreys, Matthew P., Ishii, Masao, Jeansson, Emil, Murata, Akihiko, Müller, Jens Daniel, Pérez, Fiz F., Schirnick, Carsten, Steinfeldt, Reiner, Suzuki, Toru, Ulfsbo, Adam, Velo, Anton, Woosley, Ryan J., Key, Robert M., Lauvset, Siv K., Lange, Nico, Tanhua, Toste, Bittig, Henry C., Olsen, Are, Kozyr, Alex, Álvarez, Marta, Azetsu-Scott, Kumiko, Brown, Peter J., Carter, Brendan R., Cotrim da Cunha, Leticia, Hoppema, Mario, Humphreys, Matthew P., Ishii, Masao, Jeansson, Emil, Murata, Akihiko, Müller, Jens Daniel, Pérez, Fiz F., Schirnick, Carsten, Steinfeldt, Reiner, Suzuki, Toru, Ulfsbo, Adam, Velo, Anton, Woosley, Ryan J., and Key, Robert M.
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- 2024
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8. Observational and numerical modeling constraints on the global ocean biological carbon pump
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Doney, Scott C., primary, Mitchell, Kayla Alexis, additional, Henson, Stephanie Anne, additional, Cavan, Emma L, additional, DeVries, Timothy, additional, Gruber, Nicolas, additional, Hauck, Judith, additional, Mouw, Colleen B., additional, Müller, Jens Daniel, additional, and Primeau, Francois W., additional
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- 2024
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9. Supplementary material to "The annual update GLODAPv2.2023: the global interior ocean biogeochemical data product"
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Lauvset, Siv K., primary, Lange, Nico, additional, Tanhua, Toste, additional, Bittig, Henry C., additional, Olsen, Are, additional, Kozyr, Alex, additional, Álvarez, Marta, additional, Azetsu-Scott, Kumiko, additional, Brown, Peter J., additional, Carter, Brendan R., additional, Cotrim da Cunha, Leticia, additional, Hoppema, Mario, additional, Humphreys, Matthew P., additional, Ishii, Masao, additional, Jeansson, Emil, additional, Murata, Akihiko, additional, Müller, Jens Daniel, additional, Perez, Fiz F., additional, Schirnick, Carsten, additional, Steinfeldt, Reiner, additional, Suzuki, Toru, additional, Ulfsbo, Adam, additional, Velo, Anton, additional, Woosley, Ryan J., additional, and Key, Robert, additional
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- 2024
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10. Decadal Trends in the Oceanic Storage of Anthropogenic Carbon from 1994 to 2014 [Dataset]
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European Commission, Müller, Jens Daniel [0000-0003-3137-088], Gruber, Nicolas [0000-0002-2085-2310], Carter, Brendan R. [0000-0003-2445-0711], Feely, Richard A. [0000-0003-3245-3568], Ishii, Masao [0000-0002-7328-4599], Lauvset, Siv K. [0000-0001-8498-4067], Murata, Akihiko [0000-0002-5931-2784], Olsen, Are [0000-0003-1696-9142], Pérez, Fiz F. [0000-0003-4836-8974], Sabine, Christopher L. [0000-0001-6945-8552], Tanhua, Toste [0000-0002-0313-2557], Wanninkhof, Rik [0000-0003-1973-3514], Zhu, Donghe [0000-0002-6033-9079], Müller, Jens Daniel [jensdaniel.mueller@usys.ethz.ch], Müller, Jens Daniel, Gruber, Nicolas, Carter, Brendan R., Feely, Richard A., Ishii, Masao, Lange, Nico, Lauvset, Siv K., Murata, Akihiko, Olsen, Are, Pérez, Fiz F., Sabine, Christopher L., Tanhua, Toste, Wanninkhof, Rik, Zhu, Donghe, European Commission, Müller, Jens Daniel [0000-0003-3137-088], Gruber, Nicolas [0000-0002-2085-2310], Carter, Brendan R. [0000-0003-2445-0711], Feely, Richard A. [0000-0003-3245-3568], Ishii, Masao [0000-0002-7328-4599], Lauvset, Siv K. [0000-0001-8498-4067], Murata, Akihiko [0000-0002-5931-2784], Olsen, Are [0000-0003-1696-9142], Pérez, Fiz F. [0000-0003-4836-8974], Sabine, Christopher L. [0000-0001-6945-8552], Tanhua, Toste [0000-0002-0313-2557], Wanninkhof, Rik [0000-0003-1973-3514], Zhu, Donghe [0000-0002-6033-9079], Müller, Jens Daniel [jensdaniel.mueller@usys.ethz.ch], Müller, Jens Daniel, Gruber, Nicolas, Carter, Brendan R., Feely, Richard A., Ishii, Masao, Lange, Nico, Lauvset, Siv K., Murata, Akihiko, Olsen, Are, Pérez, Fiz F., Sabine, Christopher L., Tanhua, Toste, Wanninkhof, Rik, and Zhu, Donghe
- Abstract
This dataset consists of the estimated decadal changes in the oceanic content of anthropogenic CO2 (∆Cant) between 1994, 2004 and 2014 as described in detail in Müller et al. (2023, in press, AGU Advances). These estimates have been derived from the GLODAPv2.2021 product (Lauvset et al., 2021) using the eMLR(C*) method developed by Clement & Gruber (2018). The datasets contain in addition to the standard estimate also 10 sensitivity cases, which are intended to assess the robustness of the standard estimates to different changes in the estimation procedure. All estimates are provided on a horizontal grid with 1° x 1° resolution. Two primary files are provided: one containing the full three-dimensional distribution of ∆Cant and one containing the vertically integrated values, i.e., the column inventories
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- 2023
11. Global Ocean Data Analysis Project version 2.2023 (GLODAPv2.2023)
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National Oceanic and Atmospheric Administration (US), National Science Foundation (US), European Commission, Environmental Restoration and Conservation Agency (Japan), Lauvset, Siv K. [0000-0001-8498-4067], Tanhua, Toste [0000-0002-0313-2557], Olsen, Are [0000-0003-1696-9142], Kozyr, Alex [0000-0003-4836-8974], Álvarez-Rodríguez, Marta [0000-0002-5075-9344], Azetsu-Scott, Kumiko [0000-0002-1466-6386], Carter, Brendan R. [0000-0003-2445-0711], Feely, Richard A. [0000-0003-3245-3568], Ishii, Masao [0000-0002-7328-4599], Lo Monaco, Claire [0000-0002-5653-5018], Murata, Akihiko [0000-0002-5931-2784], Müller, Jens Daniel [0000-0003-3137-0883], Pérez, Fiz F. [0000-0003-4836-8974], Tilbrook, Bronte [0000-0001-9385-3827], Velo, A. [0000-0002-7598-5700], Lange, Nico [nlan@norceresearch.no], Lauvset, Siv K., Lange, Nico, Tanhua, Toste, Bittig, Henry C., Olsen, Are, Kozyr, Alex, Álvarez-Rodríguez, Marta, Azetsu-Scott, Kumiko, Becker, Susan, Brown, Peter J., Carter, Brendan R., Cotrim da Cunha, Leticia, Feely, Richard A., Hoppema, Mario, Humphreys, Matthew P., Ishii, Masao, Jeansson, Emil, Jones, Steve D., Lo Monaco, Claire, Murata, Akihiko, Müller, Jens Daniel, Pérez, Fiz F., Schirnick, Carsten, Steinfeldt, Reiner, Suzuki, Toru, Tilbrook, Bronte, Ulfsbo, Adam, Velo, A., Woosley, Ryan J., Key, Robert M., National Oceanic and Atmospheric Administration (US), National Science Foundation (US), European Commission, Environmental Restoration and Conservation Agency (Japan), Lauvset, Siv K. [0000-0001-8498-4067], Tanhua, Toste [0000-0002-0313-2557], Olsen, Are [0000-0003-1696-9142], Kozyr, Alex [0000-0003-4836-8974], Álvarez-Rodríguez, Marta [0000-0002-5075-9344], Azetsu-Scott, Kumiko [0000-0002-1466-6386], Carter, Brendan R. [0000-0003-2445-0711], Feely, Richard A. [0000-0003-3245-3568], Ishii, Masao [0000-0002-7328-4599], Lo Monaco, Claire [0000-0002-5653-5018], Murata, Akihiko [0000-0002-5931-2784], Müller, Jens Daniel [0000-0003-3137-0883], Pérez, Fiz F. [0000-0003-4836-8974], Tilbrook, Bronte [0000-0001-9385-3827], Velo, A. [0000-0002-7598-5700], Lange, Nico [nlan@norceresearch.no], Lauvset, Siv K., Lange, Nico, Tanhua, Toste, Bittig, Henry C., Olsen, Are, Kozyr, Alex, Álvarez-Rodríguez, Marta, Azetsu-Scott, Kumiko, Becker, Susan, Brown, Peter J., Carter, Brendan R., Cotrim da Cunha, Leticia, Feely, Richard A., Hoppema, Mario, Humphreys, Matthew P., Ishii, Masao, Jeansson, Emil, Jones, Steve D., Lo Monaco, Claire, Murata, Akihiko, Müller, Jens Daniel, Pérez, Fiz F., Schirnick, Carsten, Steinfeldt, Reiner, Suzuki, Toru, Tilbrook, Bronte, Ulfsbo, Adam, Velo, A., Woosley, Ryan J., and Key, Robert M.
- Abstract
This dataset consists of the GLODAPv2.2023 data product composed of data from 1108 scientific cruises covering the global ocean between 1972 and 2021. It includes full depth discrete bottle measurements of salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon (TCO2), total alkalinity (TAlk), CO2 fugacity (fCO2), pH, chlorofluorocarbons (CFC-11, CFC-12, CFC-113, and CCl4), SF6, and various isotopes and organic compounds. It was created by appending data from 23 cruises to GLODAPv2.2022 (Lauvset et al., 2022, NCEI Accession 0257247). The data for salinity, oxygen, nitrate, silicate, phosphate, TCO2, TAlk, pH, CFC-11, CFC-12, CFC-113, CCl4, and SF6 were subjected to primary and secondary quality control. Severe biases in these data have been corrected for, and outliers removed. However, differences in data related to any known or likely time trends or variations have not been corrected for. These data are believed to be accurate to 0.005 in salinity, 1% in oxygen, 2% in nitrate, 2% in silicate, 2% in phosphate, 4 µmol kg-1 in TCO2, 4 µmol kg-1 in TAlk, and for the halogenated transient tracers and SF6: 5%
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- 2023
12. An Assessment of CO2 Uptake in the Arctic Ocean From 1985 to 2018
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Yasunaka, Sayaka, primary, Manizza, Manfredi, additional, Terhaar, Jens, additional, Olsen, Are, additional, Yamaguchi, Ryohei, additional, Landschützer, Peter, additional, Watanabe, Eiji, additional, Carroll, Dustin, additional, Adiwira, Hanani, additional, Müller, Jens Daniel, additional, and Hauck, Judith, additional
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- 2023
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13. Comment on bg-2023-113
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Müller, Jens Daniel, primary
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- 2023
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14. Magnitude, Trends, and Variability of the Global Ocean Carbon Sink From 1985 to 2018
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DeVries, Tim, primary, Yamamoto, Kana, additional, Wanninkhof, Rik, additional, Gruber, Nicolas, additional, Hauck, Judith, additional, Müller, Jens Daniel, additional, Bopp, Laurent, additional, Carroll, Dustin, additional, Carter, Brendan, additional, Chau, Thi‐Tuyet‐Trang, additional, Doney, Scott C., additional, Gehlen, Marion, additional, Gloege, Lucas, additional, Gregor, Luke, additional, Henson, Stephanie, additional, Kim, Ji Hyun, additional, Iida, Yosuke, additional, Ilyina, Tatiana, additional, Landschützer, Peter, additional, Le Quéré, Corinne, additional, Munro, David, additional, Nissen, Cara, additional, Patara, Lavinia, additional, Pérez, Fiz F., additional, Resplandy, Laure, additional, Rodgers, Keith B., additional, Schwinger, Jörg, additional, Séférian, Roland, additional, Sicardi, Valentina, additional, Terhaar, Jens, additional, Triñanes, Joaquin, additional, Tsujino, Hiroyuki, additional, Watson, Andrew, additional, Yasunaka, Sayaka, additional, and Zeng, Jiye, additional
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- 2023
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15. Seasonal Variability of the Surface Ocean Carbon Cycle: A Synthesis
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Rodgers, Keith B., primary, Schwinger, Jörg, additional, Fassbender, Andrea J., additional, Landschützer, Peter, additional, Yamaguchi, Ryohei, additional, Frenzel, Hartmut, additional, Stein, Karl, additional, Müller, Jens Daniel, additional, Goris, Nadine, additional, Sharma, Sahil, additional, Bushinsky, Seth, additional, Chau, Thi‐Tuyet‐Trang, additional, Gehlen, Marion, additional, Gallego, M. Angeles, additional, Gloege, Lucas, additional, Gregor, Luke, additional, Gruber, Nicolas, additional, Hauck, Judith, additional, Iida, Yosuke, additional, Ishii, Masao, additional, Keppler, Lydia, additional, Kim, Ji‐Eun, additional, Schlunegger, Sarah, additional, Tjiputra, Jerry, additional, Toyama, Katsuya, additional, Vaittinada Ayar, Pradeebane, additional, and Velo, Antón, additional
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- 2023
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16. Decadal Trends in the Oceanic Storage of Anthropogenic Carbon From 1994 to 2014
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Müller, Jens Daniel, primary, Gruber, N., additional, Carter, B., additional, Feely, R., additional, Ishii, M., additional, Lange, N., additional, Lauvset, S. K., additional, Murata, A., additional, Olsen, A., additional, Pérez, F. F., additional, Sabine, C., additional, Tanhua, T., additional, Wanninkhof, R., additional, and Zhu, D., additional
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- 2023
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17. Assessment of Global Ocean Biogeochemistry Models for Ocean Carbon Sink Estimates in RECCAP2 and Recommendations for Future Studies
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Terhaar, Jens, primary, Goris, Nadine, additional, Müller, Jens Daniel, additional, DeVries, Timothy, additional, Gruber, Nicolas, additional, Hauck, Judith, additional, Pérez, Fiz F., additional, and Séférian, Roland, additional
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- 2023
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18. A Synthesis of Global Coastal Ocean Greenhouse Gas Fluxes
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Resplandy, Laure, primary, Hogikyan, Allison, additional, Bange, Hermann Werner, additional, Bianchi, Daniele, additional, Weber, Thomas S, additional, Cai, Wei-Jun, additional, Doney, Scott C., additional, Fennel, Katja, additional, Gehlen, Marion, additional, Hauck, Judith, additional, Lacroix, Fabrice, additional, Landschützer, Peter, additional, Quéré, Corinne Le, additional, Müller, Jens Daniel, additional, Najjar, Raymond Gabriel, additional, Roobaert, Alizée, additional, Berthet, Sarah, additional, Bopp, Laurent, additional, Chau, Trang Thi-Tuyet, additional, Dai, Minhan, additional, Gruber, Nicolas, additional, Ilyina, Tatiana, additional, Kock, Annette, additional, Manizza, Manfredi, additional, Lachkar, Zouhair, additional, Laruelle, Goulven Gildas, additional, Liao, Enhui, additional, Lima, Ivan D., additional, Nissen, Cara, additional, Rödenbeck, Christian, additional, Séférian, Roland, additional, Schwinger, Jörg, additional, Toyama, Katsuya, additional, Tsujino, Hiroyuki, additional, and Regnier, Pierre, additional
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- 2023
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19. reccap2_seasonality_main_plus_supp_apr06_2023
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Rodgers, Keith, primary, Schwinger, Jörg, additional, Fassbender, Andrea, additional, Landschützer, Peter, additional, Yamaguchi, Ryohei, additional, Frenzel, Hartmut, additional, Stein, Karl, additional, Müller, Jens Daniel, additional, Goris, Nadine, additional, Sharma, Sahil, additional, Bushinsky, Seth, additional, Chau, Thi-Tuyet-Trang, additional, Gehlen, Marion, additional, Gallego, M. Angeles, additional, Gloege, Lucas, additional, Gregor, Luke, additional, Gruber, Nicolas, additional, Hauck, Judith, additional, Iida, Yosuke, additional, Ishii, Masao, additional, Keppler, Lydia, additional, Kim, Ji-Eun, additional, Schlunegger, Sarah, additional, Tjiputra, Jerry, additional, Toyama, Katsuya, additional, Ayar, Pradeebane Vaittinada, additional, and Vélo, Anton, additional
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- 2023
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20. Magnitude, Trends, and Variability of the Global Ocean Carbon Sink From 1985 to 2018
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DeVries, Tim, Yamamoto, Kana, Wanninkhof, Rik, Gruber, Nicolas, Hauck, Judith, Müller, Jens Daniel, Bopp, Laurent, Carroll, Dustin, Carter, Brendan, Chau, Thi‐Tuyet‐Trang, Doney, Scott C., Gehlen, Marion, Gloege, Lucas, Gregor, Luke, Henson, Stephanie, Kim, Ji Hyun, Iida, Yosuke, Ilyina, Tatiana, Landschützer, Peter, Le Quéré, Corinne, Munro, David, Nissen, Cara, Patara, Lavinia, Pérez, Fiz F., Resplandy, Laure, Rodgers, Keith B., Schwinger, Jörg, Séférian, Roland, Sicardi, Valentina, Terhaar, Jens, Triñanes, Joaquin, Tsujino, Hiroyuki, Watson, Andrew, Yasunaka, Sayaka, Zeng, Jiye, DeVries, Tim, Yamamoto, Kana, Wanninkhof, Rik, Gruber, Nicolas, Hauck, Judith, Müller, Jens Daniel, Bopp, Laurent, Carroll, Dustin, Carter, Brendan, Chau, Thi‐Tuyet‐Trang, Doney, Scott C., Gehlen, Marion, Gloege, Lucas, Gregor, Luke, Henson, Stephanie, Kim, Ji Hyun, Iida, Yosuke, Ilyina, Tatiana, Landschützer, Peter, Le Quéré, Corinne, Munro, David, Nissen, Cara, Patara, Lavinia, Pérez, Fiz F., Resplandy, Laure, Rodgers, Keith B., Schwinger, Jörg, Séférian, Roland, Sicardi, Valentina, Terhaar, Jens, Triñanes, Joaquin, Tsujino, Hiroyuki, Watson, Andrew, Yasunaka, Sayaka, and Zeng, Jiye
- Abstract
This contribution to the RECCAP2 (REgional Carbon Cycle Assessment and Processes) assessment analyzes the processes that determine the global ocean carbon sink, and its trends and variability over the period 1985-2018, using a combination of models and observation-based products. The mean sea-air CO2 flux from 1985 to 2018 is -1.6 +/- 0.2 PgC yr(-1) based on an ensemble of reconstructions of the history of sea surface pCO(2) (pCO(2) products). Models indicate that the dominant component of this flux is the net oceanic uptake of anthropogenic CO2, which is estimated at -2.1 +/- 0.3 PgC yr(-1) by an ensemble of ocean biogeochemical models, and -2.4 +/- 0.1 PgC yr(-1) by two ocean circulation inverse models. The ocean also degasses about 0.65 +/- 0.3 PgC yr(-1) of terrestrially derived CO2, but this process is not fully resolved by any of the models used here. From 2001 to 2018, the pCO2 products reconstruct a trend in the ocean carbon sink of -0.61 +/- 0.12 PgC yr(-1) decade(-1), while biogeochemical models and inverse models diagnose an anthropogenic CO2-driven trend of -0.34 +/- 0.06 and -0.41 +/- 0.03 PgC yr(-1) decade(-1), respectively. This implies a climate-forced acceleration of the ocean carbon sink in recent decades, but there are still large uncertainties on the magnitude and cause of this trend. The interannual to decadal variability of the global carbon sink is mainly driven by climate variability, with the climate-driven variability exceeding the CO2-forced variability by 2-3 times. These results suggest that anthropogenic CO2 dominates the ocean CO2 sink, while climate-driven variability is potentially large but highly uncertain and not consistently captured across different methods.
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- 2023
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21. Magnitude, Trends, and Variability of the Global Ocean Carbon Sink From 1985 to 2018
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National Science Foundation (US), National Oceanic and Atmospheric Administration (US), European Commission, Helmholtz Association, National Aeronautics and Space Administration (US), Research Foundation - Flanders, German Research Foundation, Ministerio de Ciencia e Innovación (España), Research Council of Norway, Swiss National Science Foundation, Royal Society (UK), Devries, Timothy, Yamamoto, Kama, Wanninkhof, Rik, Gruber, Nicolas, Hauck, Judith, Müller, Jens Daniel, Bopp, Laurent, Carroll, Dustin, Carter, Brendan R., Chau, Thi-Tuyet-Trang, Doney, Scott C., Gehlen, Marion, Gloege, Lucas, Gregor, Luke, Henson, Stephanie, Kim, Ji Hyun, Iida, Yosuke, Ilyina, Tatiana, Landschützer, Peter, Le Quéré, Corinne, Munro, David R., Nissen, Cara, Patara, Lavinia, Pérez, Fiz F., Resplandy, Laure, Rodgers, Keith B., Schwinger, Jörg, Séférian, Roland, Sicardi, Valentina, Terhaar, Jens, Triñanes, Joaquin, Tsujino, Hiroyuki, Watson, Andrew J., Yasunaka, Sayaka, Zeng, Jiye, National Science Foundation (US), National Oceanic and Atmospheric Administration (US), European Commission, Helmholtz Association, National Aeronautics and Space Administration (US), Research Foundation - Flanders, German Research Foundation, Ministerio de Ciencia e Innovación (España), Research Council of Norway, Swiss National Science Foundation, Royal Society (UK), Devries, Timothy, Yamamoto, Kama, Wanninkhof, Rik, Gruber, Nicolas, Hauck, Judith, Müller, Jens Daniel, Bopp, Laurent, Carroll, Dustin, Carter, Brendan R., Chau, Thi-Tuyet-Trang, Doney, Scott C., Gehlen, Marion, Gloege, Lucas, Gregor, Luke, Henson, Stephanie, Kim, Ji Hyun, Iida, Yosuke, Ilyina, Tatiana, Landschützer, Peter, Le Quéré, Corinne, Munro, David R., Nissen, Cara, Patara, Lavinia, Pérez, Fiz F., Resplandy, Laure, Rodgers, Keith B., Schwinger, Jörg, Séférian, Roland, Sicardi, Valentina, Terhaar, Jens, Triñanes, Joaquin, Tsujino, Hiroyuki, Watson, Andrew J., Yasunaka, Sayaka, and Zeng, Jiye
- Abstract
This contribution to the RECCAP2 (REgional Carbon Cycle Assessment and Processes) assessment analyzes the processes that determine the global ocean carbon sink, and its trends and variability over the period 1985–2018, using a combination of models and observation-based products. The mean sea-air CO2 flux from 1985 to 2018 is −1.6 ± 0.2 PgC yr−1 based on an ensemble of reconstructions of the history of sea surface pCO2 (pCO2 products). Models indicate that the dominant component of this flux is the net oceanic uptake of anthropogenic CO2, which is estimated at −2.1 ± 0.3 PgC yr−1 by an ensemble of ocean biogeochemical models, and −2.4 ± 0.1 PgC yr−1 by two ocean circulation inverse models. The ocean also degasses about 0.65 ± 0.3 PgC yr−1 of terrestrially derived CO2, but this process is not fully resolved by any of the models used here. From 2001 to 2018, the pCO2 products reconstruct a trend in the ocean carbon sink of −0.61 ± 0.12 PgC yr−1 decade−1, while biogeochemical models and inverse models diagnose an anthropogenic CO2-driven trend of −0.34 ± 0.06 and −0.41 ± 0.03 PgC yr−1 decade−1, respectively. This implies a climate-forced acceleration of the ocean carbon sink in recent decades, but there are still large uncertainties on the magnitude and cause of this trend. The interannual to decadal variability of the global carbon sink is mainly driven by climate variability, with the climate-driven variability exceeding the CO2-forced variability by 2–3 times. These results suggest that anthropogenic CO2 dominates the ocean CO2 sink, while climate-driven variability is potentially large but highly uncertain and not consistently captured across different methods
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- 2023
22. Seasonal Variability of the Surface Ocean Carbon Cycle: A Synthesis
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National Institute for Environmental Studies (Japan), Japan Agency for Marine-Earth Science and Technology, European Space Agency, Institute for Basic Science (South Korea), Research Council of Norway, National Oceanic and Atmospheric Administration (US), European Commission, Helmholtz Association, Environmental Restoration and Conservation Agency (Japan), Ministry of the Environment (Japan), Ministerio de Ciencia e Innovación (España), Rodgers, Keith B., Schwinger, Jörg, Fassbender, Andrea J., Landschützer, Peter, Yamaguchi, Ryohei, Frenzel, Hartmut, Stein, Karl, Müller, Jens Daniel, Goris, Nadine, Sharma, Sahil, Bushinsky, Seth, Chau, Thi-Tuyet-Trang, Gehlen, Marion, Gallego, M. Angeles, Gloege, Lucas, Gregor, Luke, Gruber, Nicolas, Hauck, Judith, Iida, Yosuke, Ishii, Masao, Keppler, Lydia, Kim, Ji-Eun, Schlunegger, Sarah, Tjiputra, Jerry, Toyama, Katsuya, Ayar, Pradeebane Vaittinada, Velo, A., National Institute for Environmental Studies (Japan), Japan Agency for Marine-Earth Science and Technology, European Space Agency, Institute for Basic Science (South Korea), Research Council of Norway, National Oceanic and Atmospheric Administration (US), European Commission, Helmholtz Association, Environmental Restoration and Conservation Agency (Japan), Ministry of the Environment (Japan), Ministerio de Ciencia e Innovación (España), Rodgers, Keith B., Schwinger, Jörg, Fassbender, Andrea J., Landschützer, Peter, Yamaguchi, Ryohei, Frenzel, Hartmut, Stein, Karl, Müller, Jens Daniel, Goris, Nadine, Sharma, Sahil, Bushinsky, Seth, Chau, Thi-Tuyet-Trang, Gehlen, Marion, Gallego, M. Angeles, Gloege, Lucas, Gregor, Luke, Gruber, Nicolas, Hauck, Judith, Iida, Yosuke, Ishii, Masao, Keppler, Lydia, Kim, Ji-Eun, Schlunegger, Sarah, Tjiputra, Jerry, Toyama, Katsuya, Ayar, Pradeebane Vaittinada, and Velo, A.
- Abstract
The seasonal cycle is the dominant mode of variability in the air-sea CO2 flux in most regions of the global ocean, yet discrepancies between different seasonality estimates are rather large. As part of the Regional Carbon Cycle Assessment and Processes Phase 2 project (RECCAP2), we synthesize surface ocean pCO2 and air-sea CO2 flux seasonality from models and observation-based estimates, focusing on both a present-day climatology and decadal changes between the 1980s and 2010s. Four main findings emerge: First, global ocean biogeochemistry models (GOBMs) and observation-based estimates (pCO2 products) of surface pCO2 seasonality disagree in amplitude and phase, primarily due to discrepancies in the seasonal variability in surface DIC. Second, the seasonal cycle in pCO2 has increased in amplitude over the last three decades in both pCO2 products and GOBMs. Third, decadal increases in pCO2 seasonal cycle amplitudes in subtropical biomes for both pCO2 products and GOBMs are driven by increasing DIC concentrations stemming from the uptake of anthropogenic CO2 (Cant). In subpolar and Southern Ocean biomes, however, the seasonality change for GOBMs is dominated by Cant invasion, whereas for pCO2 products an indeterminate combination of Cant invasion and climate change modulates the changes. Fourth, biome-aggregated decadal changes in the amplitude of pCO2 seasonal variability are largely detectable against both mapping uncertainty (reducible) and natural variability uncertainty (irreducible), but not at the gridpoint scale over much of the northern subpolar oceans and over the Southern Ocean, underscoring the importance of sustained high-quality seasonally resolved measurements over these regions
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- 2023
23. Constraining regional and global ocean carbon fluxes 1985 to 2018 in RECCAP2
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Hauck, Judith, Gruber, Nicolas, Ishii, Masao, Müller, Jens Daniel, Carter, Brendan R., Dai, Minhan, Devries, Timothy, Doney, Scott C., Fassbender, Andrea J., Gehlen, Marion, Goris, Nadine, Gregor, Luke, Henson, Stephanie, Lachkar; Zouhair, Landschützer, Peter, Laruelle, Goulven, Manizza, Manfredi, Olsen, Are, Pérez, Fiz F., Regnier, Pierre, Resplandy, Laure, Rodgers, Keith B., Sarma, V. V. S. S., Schwinger, Jörg, Terhaar, Jens, Tjiputra, Jerry, Wanninkhof, Rik, Yasunaka, Sayaka, Canadell, Josep G., Hauck, Judith, Gruber, Nicolas, Ishii, Masao, Müller, Jens Daniel, Carter, Brendan R., Dai, Minhan, Devries, Timothy, Doney, Scott C., Fassbender, Andrea J., Gehlen, Marion, Goris, Nadine, Gregor, Luke, Henson, Stephanie, Lachkar; Zouhair, Landschützer, Peter, Laruelle, Goulven, Manizza, Manfredi, Olsen, Are, Pérez, Fiz F., Regnier, Pierre, Resplandy, Laure, Rodgers, Keith B., Sarma, V. V. S. S., Schwinger, Jörg, Terhaar, Jens, Tjiputra, Jerry, Wanninkhof, Rik, Yasunaka, Sayaka, and Canadell, Josep G.
- Abstract
Keeping global warming in line with the Paris Agreement requires rapid reductions in CO2 emissions. Tracking these reductions demands a thorough bookkeeping of natural and anthropogenic carbon fluxes. The second REgional Carbon Cycle Assessment and Processes (RECCAP2) activity of the Global Carbon Project aims to accurately assess land and ocean CO2 sources and sinks through the efforts of hundreds of scientists around the globe. For the ocean component, regional budgets are developed for the global ocean and five large regions for the period 1980-2018. In addition, four ‘special focus’ themes, namely the biological carbon pump, the seasonal cycle, the coastal ocean and model evaluation are addressed. We use state-of-the-art ocean models and observation-based datasets to provide robust estimates of regional CO2 budgets and constrain their uncertainties. Here, we will provide an overview of RECCAP2 activities, and showcase key results focusing on mean ocean carbon fluxes, and their trends and variability
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- 2023
24. An assessment of CO2 storage and sea-air fluxes for the Atlantic Ocean and Mediterranean Sea between 1985 and 2018 [Oral]
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Pérez, Fiz F., Gehlen, Marion, Tjiputra, Jerry, Olsen, Are, Becker, Meike, López-Mozos, Marta, Müller, Jens Daniel, Goris, Nadine, Hauck, Judith, Pérez, Fiz F., Gehlen, Marion, Tjiputra, Jerry, Olsen, Are, Becker, Meike, López-Mozos, Marta, Müller, Jens Daniel, Goris, Nadine, and Hauck, Judith
- Abstract
The dynamic and thermohaline characteristics of the Atlantic Ocean linked to the Atlantic Meridional Overturning Circulation (AMOC) give it a specific role in the accumulation of heat and CO2, either of natural or anthropogenic origin (Cant), from the surface layer to the deep waters, significantly mitigating the impacts of anthropogenic climate change. Here, we evaluate the annual mean, long-term trends, seasonal cycle and interannual variability of net sea-air CO2 fluxes (FCO2) between 1985 and 2018 based on observation products (pCO2-products) and global ocean biogeochemical models (GOBMs) for the Atlantic from 30ºS to the Nordic Seas (~79ºN) and the Mediterranean. The mean contemporary FCO2 (sum of anthropogenic and natural components) is estimated to be 0.362 ± 0.067 and 0.47 ± 0.15 Pg C yr-1 using pCO2-products and GOBMs, respectively. The GOBMs show consistent growth trends in CO2 uptake with rates similar to the atmospheric CO2 growth, however trends obtained from CO2-products show a sharp increase from the pre-2000 period to the post-2000 period. There is overall agreement between pCO2-products and GOBMs results for mean values, seasonal cycle and interannual variability in all biomes, except for the North Atlantic subpolar biome, where pCO2-products show lower mean values, larger trends, and a different seasonal cycle than GOBMs. The GOBMs and pCO2-products show very concordant values in equatorial and subtropical regions, where CO2 variability is strongly determined by temperature. For the period 1994-2007, GOBMs show concordant values in annual Cant storage rate with carbonate marine system observations (Gruber et al., 2019) with values of 0.506 ± 0.106 Pg C yr-1 vs 0.673 ± 0.066 Pg C yr-1, respectively. The Cant storage rate agreement between GOBMs and observations are also registered in the different biomes, although in both permanently stratified subtropical in North and South Atlantic biomes, the storage rates in GOBMs show a larger spread with their
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- 2023
25. RECCAP2-ocean: Regional Carbon Cycle Assessment and Processes Phase 2
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Müller, Jens Daniel, Hauck, Judith, Gruber, Nicolas, Ishii, Masao, Carter, Brendan R., Dai, Minhan, Devries, Timothy, Doney, Scott C., Fassbender, Andrea J., Gehlen, Marion, Goris, Nadine, Gregor, Luke, Henson, Stephanie, Lachkar; Zouhair, Landschützer, Peter, Laruelle, Goulven, Manizza, Manfredi, Olsen, Are, Pérez, Fiz F., Regnier, Pierre, Resplandy, Laure, Rodgers, Keith B., Sarma, V. V. S. S., Schwinger, Jörg, Terhaar, Jens, Tjiputra, Jerry, Wanninkhof, Rik, Yasunaka, Sayaka, Bastos, Ana, Poulter, Benjamin, Canadell, Josep G., Müller, Jens Daniel, Hauck, Judith, Gruber, Nicolas, Ishii, Masao, Carter, Brendan R., Dai, Minhan, Devries, Timothy, Doney, Scott C., Fassbender, Andrea J., Gehlen, Marion, Goris, Nadine, Gregor, Luke, Henson, Stephanie, Lachkar; Zouhair, Landschützer, Peter, Laruelle, Goulven, Manizza, Manfredi, Olsen, Are, Pérez, Fiz F., Regnier, Pierre, Resplandy, Laure, Rodgers, Keith B., Sarma, V. V. S. S., Schwinger, Jörg, Terhaar, Jens, Tjiputra, Jerry, Wanninkhof, Rik, Yasunaka, Sayaka, Bastos, Ana, Poulter, Benjamin, and Canadell, Josep G.
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- 2023
26. An Assessment of CO2 Uptake in the Arctic Ocean From 1985 to 2018.
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Yasunaka, Sayaka, Manizza, Manfredi, Terhaar, Jens, Olsen, Are, Yamaguchi, Ryohei, Landschützer, Peter, Watanabe, Eiji, Carroll, Dustin, Adiwira, Hanani, Müller, Jens Daniel, and Hauck, Judith
- Subjects
CARBON cycle ,ATMOSPHERIC carbon dioxide ,COOLING of water ,SEA ice ,OCEAN ,ARCTIC climate ,AUTUMN - Abstract
As a contribution to the Regional Carbon Cycle Assessment and Processes phase 2 (RECCAP2) project, we present synthesized estimates of Arctic Ocean sea‐air CO2 fluxes and their uncertainties from surface ocean pCO2‐observation products, ocean biogeochemical hindcast and data assimilation models, and atmospheric inversions. For the period of 1985–2018, the Arctic Ocean was a net sink of CO2 of 116 ± 4 TgC yr−1 in the pCO2 products, 92 ± 30 TgC yr−1 in the models, and 91 ± 21 TgC yr−1 in the atmospheric inversions. The CO2 uptake peaks in late summer and early autumn, and is low in winter when sea ice inhibits sea‐air fluxes. The long‐term mean CO2 uptake in the Arctic Ocean is primarily caused by steady‐state fluxes of natural carbon (70% ± 15%), and enhanced by the atmospheric CO2 increase (19% ± 5%) and climate change (11% ± 18%). The annual mean CO2 uptake increased from 1985 to 2018 at a rate of 31 ± 13 TgC yr−1 dec−1 in the pCO2 products, 10 ± 4 TgC yr−1 dec−1 in the models, and 32 ± 16 TgC yr−1 dec−1 in the atmospheric inversions. Moreover, 77% ± 38% of the trend in the net CO2 uptake over time is caused by climate change, primarily due to rapid sea ice loss in recent years. Furthermore, true uncertainties may be larger than the given ensemble standard deviations due to common structural biases across all individual estimates. Plain Language Summary: The Arctic Ocean is at present a net sink for atmospheric CO2 mainly due to the intense cooling of the inflowing waters from the Atlantic and the Pacific. Global warming is amplified in the Arctic Ocean and it experiences a rapid retreat of sea ice. Here, we present synthesized estimates of the Arctic Ocean CO2 uptake and their uncertainties from estimates obtained using different methods. Almost all estimates suggest that the Arctic Ocean was a net sink of CO2 from 1985 to 2018. The CO2 uptake is strong in late summer and early autumn and weak in winter, corresponding to the seasonal variation of sea ice. CO2 uptake has increased in recent years, especially in regions that have experienced sea ice loss. Compared to the global ocean, the Arctic Ocean is unique because climate change, in particular the change in sea ice cover, has enhanced the ocean CO2 uptake almost as much as the increase in atmospheric CO2 over the past 34 years. Moreover, this climate effect on the Arctic Ocean CO2 uptake has become more important in recent years and is the current main driver for the trend toward an increasing CO2 uptake in the Arctic Ocean. Key Points: The Arctic Ocean is estimated to be a net sink of CO2 of 116 ± 4 TgC yr−1 in pCO2 products and 92 ± 30 TgC yr−1 in ocean modelsThe Arctic Ocean CO2 uptake is explained by a steady‐state natural flux (70%) with atmospheric CO2 increase (19%) and climate change (11%)The CO2 uptake increased (31 ± 13 TgC yr−1 dec−1 in products and 10 ± 4 TgC yr−1 dec−1 in models) mostly by decreasing sea ice [ABSTRACT FROM AUTHOR]
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- 2023
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27. Introduction to Frontiers in Ocean Observing
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Kappel, Ellen S., Costello, Mark John, Galgani, Luisa, Gordó-Vilaseca, Cesc, Govindarajan, Annette, Kouhi, Soroush, Lavin, Charles, McCartin, Luke, Müller, Jens Daniel, Pirenne, Benoît, Tanhua, Toste, Zhao, Qianshuo, and Zhao, Shiye
- Abstract
Oceanography, 36 (1), ISSN:1042-8275, ISSN:2377-617X
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- 2023
28. Biogeochemical Transformations in the Baltic Sea
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Schneider, Bernd, primary and Müller, Jens Daniel, additional
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- 2018
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29. GLODAPv2.2022: the latest version of the global interior ocean biogeochemical data product
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Lauvset, Siv K., primary, Lange, Nico, additional, Tanhua, Toste, additional, Bittig, Henry C., additional, Olsen, Are, additional, Kozyr, Alex, additional, Alin, Simone, additional, Álvarez, Marta, additional, Azetsu-Scott, Kumiko, additional, Barbero, Leticia, additional, Becker, Susan, additional, Brown, Peter J., additional, Carter, Brendan R., additional, da Cunha, Leticia Cotrim, additional, Feely, Richard A., additional, Hoppema, Mario, additional, Humphreys, Matthew P., additional, Ishii, Masao, additional, Jeansson, Emil, additional, Jiang, Li-Qing, additional, Jones, Steve D., additional, Lo Monaco, Claire, additional, Murata, Akihiko, additional, Müller, Jens Daniel, additional, Pérez, Fiz F., additional, Pfeil, Benjamin, additional, Schirnick, Carsten, additional, Steinfeldt, Reiner, additional, Suzuki, Toru, additional, Tilbrook, Bronte, additional, Ulfsbo, Adam, additional, Velo, Anton, additional, Woosley, Ryan J., additional, and Key, Robert M., additional
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- 2022
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30. Supplementary material to "GLODAPv2.2022: the latest version of the global interior ocean biogeochemical data product"
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Lauvset, Siv K., primary, Lange, Nico, additional, Tanhua, Toste, additional, Bittig, Henry C., additional, Olsen, Are, additional, Kozyr, Alex, additional, Alin, Simone R., additional, Álvarez, Marta, additional, Azetsu-Scott, Kumiko, additional, Barbero, Leticia, additional, Becker, Susan, additional, Brown, Peter J., additional, Carter, Brendan R., additional, da Cunha, Leticia Cotrim, additional, Feely, Richard A., additional, Hoppema, Mario, additional, Humphreys, Matthew P., additional, Ishii, Masao, additional, Jeansson, Emil, additional, Jiang, Li-Qing, additional, Jones, Steve D., additional, Lo Monaco, Claire, additional, Murata, Akihiko, additional, Müller, Jens Daniel, additional, Pérez, Fiz F., additional, Pfeil, Benjamin, additional, Schirnick, Carsten, additional, Steinfeldt, Reiner, additional, Suzuki, Toru, additional, Tilbrook, Bronte, additional, Ulfsbo, Adam, additional, Velo, Anton, additional, Woosley, Ryan J., additional, and Key, Robert M., additional
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- 2022
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31. Organic Matter Mineralization as Reflected in Deep-Water CT Accumulation
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Schneider, Bernd, primary and Müller, Jens Daniel, additional
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- 2017
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32. The Main Hydrographic Characteristics of the Baltic Sea
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Schneider, Bernd, primary and Müller, Jens Daniel, additional
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- 2017
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33. Surface Water Biogeochemistry as Derived from pCO2 Observations
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Schneider, Bernd, primary and Müller, Jens Daniel, additional
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- 2017
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34. Progress Made by Investigations of the CO2 System and Open Questions
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Schneider, Bernd, primary and Müller, Jens Daniel, additional
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- 2017
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35. Introduction
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Schneider, Bernd, primary and Müller, Jens Daniel, additional
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- 2017
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36. The Database
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Schneider, Bernd, primary and Müller, Jens Daniel, additional
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- 2017
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37. The Marine CO2 System and Its Peculiarities in the Baltic Sea
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Schneider, Bernd, primary and Müller, Jens Daniel, additional
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- 2017
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38. GLODAPv2.2022: the latest version of the global interior ocean biogeochemical data product
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Lauvset, Siv K., Lange, Nico, Tanhua, Toste, Bittig, Henry C., Olsen, Are, Kozyr, Alex, Alin, Simone R., Álvarez, Marta, Azetsu-Scott, Kumiko, Barbero, Leticia, Becker, Susan, Brown, Peter J., Carter, Brendan R., da Cunha, Leticia Cotrim, Feely, Richard A., Hoppema, Mario, Humphreys, Matthew P., Ishii, Masao, Jeansson, Emil, Jiang, Li-Qing, Jones, Steve D., Lo Monaco, Claire, Murata, Akihiko, Müller, Jens Daniel, Pérez, Fiz F., Pfeil, Benjamin, Schirnick, Carsten, Steinfeldt, Reiner, Suzuki, Toru, Tilbrook, Bronte, Ulfsbo, Adam, Velo, Anton, Woosley, Ryan J., Key, Robert M., Lauvset, Siv K., Lange, Nico, Tanhua, Toste, Bittig, Henry C., Olsen, Are, Kozyr, Alex, Alin, Simone R., Álvarez, Marta, Azetsu-Scott, Kumiko, Barbero, Leticia, Becker, Susan, Brown, Peter J., Carter, Brendan R., da Cunha, Leticia Cotrim, Feely, Richard A., Hoppema, Mario, Humphreys, Matthew P., Ishii, Masao, Jeansson, Emil, Jiang, Li-Qing, Jones, Steve D., Lo Monaco, Claire, Murata, Akihiko, Müller, Jens Daniel, Pérez, Fiz F., Pfeil, Benjamin, Schirnick, Carsten, Steinfeldt, Reiner, Suzuki, Toru, Tilbrook, Bronte, Ulfsbo, Adam, Velo, Anton, Woosley, Ryan J., and Key, Robert M.
- Abstract
The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort providing regular compilations of surface-to-bottom ocean biogeochemical bottle data, with an emphasis on seawater inorganic carbon chemistry and related variables determined through chemical analysis of seawater samples. GLODAPv2.2022 is an update of the previous version, GLODAPv2.2021 (Lauvset et al., 2021). The major changes are as follows: data from 96 new cruises were added, data coverage was extended until 2021, and for the first time we performed secondary quality control on all sulphur hexafluoride (SF6) data. In addition, a number of changes were made to data included in GLODAPv2.2021. These changes affect specifically the SF6 data, which are now subjected to secondary quality control, and carbon data measured onboard the RV Knorr in the Indian Ocean in 1994–1995 which are now adjusted using CRM measurements made at the time. GLODAPv2.2022 includes measurements from almost 1.4 million water samples from the global oceans collected on 1085 cruises. The data for the now 13 GLODAP core variables (salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon, total alkalinity, pH, CFC-11, CFC-12, CFC-113, CCl4, and SF6) have undergone extensive quality control with a focus on systematic evaluation of bias. The data are available in two formats: (i) as submitted by the data originator but converted to World Ocean Circulation Experiment (WOCE) exchange format and (ii) as a merged data product with adjustments applied to minimize bias. For the present annual update, adjustments for the 96 new cruises were derived by comparing those data with the data from the 989 quality controlled cruises in the GLODAPv2.2021 data product using crossover analysis. SF6 data from all cruises were evaluated by comparison with CFC-12 data measured on the same cruises. For nutrients and ocean carbon dioxide (CO2) chemistry comparisons to estimates based on empirical algorithms provided additional contex
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- 2022
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39. GLODAPv2.2022: the latest version of the global interior ocean biogeochemical data product
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European Commission, Ministerio de Ciencia e Innovación (España), National Oceanic and Atmospheric Administration (US), National Science Foundation (US), Lauvset, Siv K., Lange, Nico, Tanhua, Toste, Bittig, Henry C., Olsen, Are, Kozyr, Alex, Alin, Simone, Álvarez-Rodríguez, Marta, Azetsu-Scott, Kumiko, Barbero, Leticia, Becker, Susan, Brown, Peter J., Carter, Brendan R., Cotrim da Cunha, Leticia, Feely, Richard A., Hoppema, Mario, Humphreys, Matthew P., Ishii, Masao, Jeansson, Emil, Jiang, Li Qing, Jones, Steve D., Lo Monaco, Claire, Murata, Akihiko, Müller, Jens Daniel, Pérez, Fiz F., Pfeil, Benjamin, Schirnick, Carsten, Steinfeldt, Reiner, Suzuki, Toru, Tilbrook, Bronte, Ulfsbo, Adam, Velo, A., Woosley, Ryan J., Key, Robert M., European Commission, Ministerio de Ciencia e Innovación (España), National Oceanic and Atmospheric Administration (US), National Science Foundation (US), Lauvset, Siv K., Lange, Nico, Tanhua, Toste, Bittig, Henry C., Olsen, Are, Kozyr, Alex, Alin, Simone, Álvarez-Rodríguez, Marta, Azetsu-Scott, Kumiko, Barbero, Leticia, Becker, Susan, Brown, Peter J., Carter, Brendan R., Cotrim da Cunha, Leticia, Feely, Richard A., Hoppema, Mario, Humphreys, Matthew P., Ishii, Masao, Jeansson, Emil, Jiang, Li Qing, Jones, Steve D., Lo Monaco, Claire, Murata, Akihiko, Müller, Jens Daniel, Pérez, Fiz F., Pfeil, Benjamin, Schirnick, Carsten, Steinfeldt, Reiner, Suzuki, Toru, Tilbrook, Bronte, Ulfsbo, Adam, Velo, A., Woosley, Ryan J., and Key, Robert M.
- Abstract
The Global Ocean Data Analysis Project (GLODAP) is a synthesis effort providing regular compilations of surface-to-bottom ocean biogeochemical bottle data, with an emphasis on seawater inorganic carbon chemistry and related variables determined through chemical analysis of seawater samples. GLODAPv2.2022 is an update of the previous version, GLODAPv2.2021 (Lauvset et al., 2021). The major changes are as follows: data from 96 new cruises were added, data coverage was extended until 2021, and for the first time we performed secondary quality control on all sulfur hexafluoride (SF6) data. In addition, a number of changes were made to data included in GLODAPv2.2021. These changes affect specifically the SF6 data, which are now subjected to secondary quality control, and carbon data measured on board the RV Knorr in the Indian Ocean in 1994-1995 which are now adjusted using certified reference material (CRM) measurements made at the time. GLODAPv2.2022 includes measurements from almost 1.4 million water samples from the global oceans collected on 1085 cruises. The data for the now 13 GLODAP core variables (salinity, oxygen, nitrate, silicate, phosphate, dissolved inorganic carbon, total alkalinity, pH, chlorofluorocarbon-11 (CFC-11), CFC-12, CFC-113, CCl4, and SF6) have undergone extensive quality control with a focus on systematic evaluation of bias. The data are available in two formats: (i) as submitted by the data originator but converted to World Ocean Circulation Experiment (WOCE) exchange format and (ii) as a merged data product with adjustments applied to minimize bias. For the present annual update, adjustments for the 96 new cruises were derived by comparing those data with the data from the 989 quality-controlled cruises in the GLODAPv2.2021 data product using crossover analysis. SF6 data from all cruises were evaluated by comparison with CFC-12 data measured on the same cruises. For nutrients and ocean carbon dioxide (CO2) chemistry comparisons to estimates b
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- 2022
40. Carbon Fluxes in the Coastal Ocean: Synthesis, Boundary Processes, and Future Trends
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Dai, Minhan, primary, Su, Jianzhong, additional, Zhao, Yangyang, additional, Hofmann, Eileen E., additional, Cao, Zhimian, additional, Cai, Wei-Jun, additional, Gan, Jianping, additional, Lacroix, Fabrice, additional, Laruelle, Goulven G., additional, Meng, Feifei, additional, Müller, Jens Daniel, additional, Regnier, Pierre A.G., additional, Wang, Guizhi, additional, and Wang, Zhixuan, additional
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- 2022
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41. Seasonal and regional pH variation determined from continuous spectrophotometric measurements on a ship of opportunity in a coastal region
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M. Lencina-Avila, Jannine, primary, Müller, Jens Daniel, additional, Otto, Stefan, additional, Glockzin, Michael, additional, Sadkowiak, Bernd, additional, and Rehder, Gregor, additional
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- 2022
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42. The diurnal cycle of <i>p</i>CO<sub>2</sub> in the coastal region of the Baltic Sea
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Honkanen, Martti, primary, Müller, Jens Daniel, additional, Seppälä, Jukka, additional, Rehder, Gregor, additional, Kielosto, Sami, additional, Ylöstalo, Pasi, additional, Mäkelä, Timo, additional, Hatakka, Juha, additional, and Laakso, Lauri, additional
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- 2021
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43. Cyanobacteria net community production in the Baltic Sea as inferred from profiling <i>p</i>CO<sub>2</sub> measurements
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Müller, Jens Daniel, primary, Schneider, Bernd, additional, Gräwe, Ulf, additional, Fietzek, Peer, additional, Wallin, Marcus Bo, additional, Rutgersson, Anna, additional, Wasmund, Norbert, additional, Krüger, Siegfried, additional, and Rehder, Gregor, additional
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- 2021
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44. Cyanobacteria net community production in the Baltic Sea as inferred from profiling pCO2 measurements
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Müller, Jens Daniel, Schneider, Bernd, Gräwe, Ulf, Fietzek, Peer, Wallin, Marcus Bo, Rutgersson, Anna, Wasmund, Norbert, Krüger, Siegfried, Rehder, Gregor, Müller, Jens Daniel, Schneider, Bernd, Gräwe, Ulf, Fietzek, Peer, Wallin, Marcus Bo, Rutgersson, Anna, Wasmund, Norbert, Krüger, Siegfried, and Rehder, Gregor
- Abstract
Organic matter production by cyanobacteria blooms is a major environmental concern for the Baltic Sea, as it promotes the spread of anoxic zones. Partial pressure of carbon dioxide (pCO2) measurements carried out on Ships of Opportunity (SOOP) since 2003 have proven to be a powerful tool to resolve the carbon dynamics of the blooms in space and time. However, SOOP measurements lack the possibility to directly constrain depth-integrated net community production (NCP) in moles of carbon per surface area due to their restriction to the sea surface. This study tackles the knowledge gap through (1) providing an NCP best guess for an individual cyanobacteria bloom based on repeated profiling measurements of pCO2 and (2) establishing an algorithm to accurately reconstruct depth-integrated NCP from surface pCO2 observations in combination with modelled temperature profiles. Goal (1) was achieved by deploying state-of-the-art sensor technology from a small-scale sailing vessel. The low-cost and flexible platform enabled observations covering an entire bloom event that occurred in July–August 2018 in the Eastern Gotland Sea. For the biogeochemical interpretation, recorded pCO2 profiles were converted to C∗T, which is the dissolved inorganic carbon concentration normalised to alkalinity. We found that the investigated bloom event was dominated by Nodularia and had many biogeochemical characteristics in common with blooms in previous years. In particular, it lasted for about 3 weeks, caused a C∗T drawdown of 90 µmol kg−1, and was accompanied by a sea surface temperature increase of 10 ∘C. The novel finding of this study is the vertical extension of the C∗T drawdown up to the compensation depth located at around 12 m. Integration of the C∗T drawdown across this depth and correction for vertical fluxes leads to an NCP best guess of ∼1.2 mol m−2 over the productive period. Addressing goal (2), we combined modelled hydrographical profiles with surface pCO2 observations recorded by, Title in Web of Science: Cyanobacteria net community production in the Baltic Sea as inferred from profiling pCO(2) measurements
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- 2021
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45. The continued accumulation of anthropogenic carbon in the global ocean during the 2010s
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Müller, Jens Daniel, Zhu, Donghe, Gregor, Luke, Olsen, Are, Lange, Nico, Lauvset, Siv K., Tanhua, Toste, Ishii, Masao, Pérez, Fiz F., Carter, Brendan R., Feely, Richard A., Wanninkhof, Rik, Gruber, Nicolas, Müller, Jens Daniel, Zhu, Donghe, Gregor, Luke, Olsen, Are, Lange, Nico, Lauvset, Siv K., Tanhua, Toste, Ishii, Masao, Pérez, Fiz F., Carter, Brendan R., Feely, Richard A., Wanninkhof, Rik, and Gruber, Nicolas
- Abstract
Surface ocean pCO2-based estimates and models indicate that the ocean sink for anthropogenic CO2 (Cant) has continued to increase unabatedly over the past decade. However, the most recent global and observation-based estimate of the accumulation of Cant in the ocean interior by Gruber et al. (2019) does not extend beyond 2007, preventing an independent assessment of this increase in the magnitude of the sink
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- 2021
46. The diurnal cycle of pCO2 in the coastal region of the Baltic Sea
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Honkanen, Martti, Müller, Jens Daniel, Seppälä, Jukka, Rehder, Gregor, Kielosto, Sami, Ylöstalo, Pasi, Mäkelä, Timo, Hatakka, Juha, and Laakso, Lauri
- Subjects
respiratory system ,respiratory tract diseases ,circulatory and respiratory physiology - Abstract
The direction and magnitude of carbon dioxide fluxes between the atmosphere and the sea are regulated by the gradient in the partial pressure of carbon dioxide (pCO2) across the air–sea interface. Typically, observations of pCO2 at the sea surface are carried out by using research vessels and ships of opportunity, which usually do not resolve the diurnal cycle of pCO2 at a given location. This study evaluates the magnitude and driving processes of the diurnal cycle of pCO2 in a coastal region of the Baltic Sea. We present pCO2 data from July 2018 to June 2019 measured in the vicinity of the island of Utö at the outer edge of the Archipelago Sea, and quantify the relevant physical, biological, and chemical processes controlling pCO2. The highest monthly median of diurnal pCO2 variability (31 µatm) was observed in August and predominantly driven by biological processes. Biological fixation and mineralization of carbon led to sinusoidal diurnal pCO2 variations, with a maximum in the morning and a minimum in the afternoon. Compared with the biological carbon transformations, the impacts of air–sea fluxes and temperature changes on pCO2 were small, with their contributions to the monthly medians of diurnal pCO2 variability being up to 12 and 5 µatm, respectively. During upwelling events, short-term pCO2 variability (up to 500 µatm within a day) largely exceeded the usual diurnal cycle. If the net annual air–sea flux of carbon dioxide at our study site and for the sampled period is calculated based on a data subset that consists of only one regular measurement per day, the bias in the net exchange depends on the sampling time and can amount up to ±12 %. This finding highlights the importance of continuous surface pCO2 measurements at fixed locations for the assessment of the short-term variability of the carbonate system and the correct determination of air–sea CO2 fluxes., Ocean Science, 17 (6), ISSN:1812-0784, ISSN:1812-0792
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- 2021
47. Reply on RC2
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Müller, Jens Daniel, primary
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- 2021
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48. Decoupling salinity and carbonate chemistry: low calcium ion concentration rather than salinity limits calcification in Baltic Sea mussels
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Sanders, Trystan, primary, Thomsen, Jörn, additional, Müller, Jens Daniel, additional, Rehder, Gregor, additional, and Melzner, Frank, additional
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- 2021
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49. Diurnal cycle of the CO2 system in the coastal region of the Baltic Sea
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Honkanen, Martti, Müller, Jens Daniel, Seppälä, Jukka, Rehder, Gregor, Kielosto, Sami, Ylöstalo, Pasi, Mäkelä, Timo, Hatakka, Juha, and Laakso, Lauri
- Abstract
The direction and magnitude of carbon dioxide exchange between the atmosphere and the sea is regulated by their difference in partial pressure of carbon dioxide (pCO2). Typically, observations of pCO2 are carried out by using research vessels and voluntary observing ships which cannot easily detect the diurnal cycle of pCO2 at a given location. This study evaluates the magnitude and driving processes of the diurnal cycle of pCO2 in a coastal region of the Baltic Sea during the different seasons.We present pCO2 data from July 2018–June 2019 carried out in the vicinity of the island of Utö in the Archipelago Sea and quantify the relevant physical, biological and chemical processes affecting pCO2. The highest monthly median diurnal pCO2 peak-to-peak amplitude (31 μatm) was observed in August. This high diurnal variation was found to be related predominantly to biological processes. The biological transformations of carbon generated a sinusoidal diurnal pCO2 variation, with a maximum in the morning and a minimum in the afternoon. Compared to the biological carbon transformations, the effect of air sea exchange of carbon dioxide and the effect of temperature changes on pCO2 are smaller, with their monthly median peak-to-peak amplitudes were up to 12 and 5 μatm, respectively. Single diurnal peak-to-peak amplitudes can be significantly larger (up to 500 μatm), during upwelling. If the net exchange of carbon dioxide between the sea and atmosphere on our study site and sampling period is calculated based on a data set that consists of only one measurement per day, the error in the budget depends on the sampling time and can be up to ±12 %.
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- 2020
50. Dataset for Diurnal cycle of the CO2 system in the coastal region of the Baltic Sea (Submitted 2020/11)
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Honkanen, Martti, Müller, Jens Daniel, Seppälä, Jukka, Rehder, Gregor, Kielosto, Sami, Ylöstalo, Pasi, Mäkelä, Timo, Hatakka, Juha, and Laakso, Lauri
- Abstract
Dataset from Uto Atmospheric and Marine Research Station (59°46’55” N, 21°21’27” E) between July 2018 and June 2019 This is a dataset for the publication: Martti Honkanen, Jens Daniel Müller, Jukka Seppälä, Gregor Rehder, Sami Kielosto, Pasi Ylöstalo, Timo Mäkelä, Juha Hatakka, and Lauri Laakso: Diurnal cycle of the CO2 system in the coastal region of the Baltic Sea (Submitted to Ocean Science 2020/11). The dataset consists of 1 hour average values of the variables used in the paper. The data are in a comma separated file that has blanks as the nan values.
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- 2020
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