Consistency and Challenges in the Ocean Carbon Sink Estimate for the Global Carbon Budget
Based on the 2019 assessment of the Global Carbon Project, the ocean took up on average, 2.5 +/- 0.6 PgC yr(-1) or 23 +/- 5% of the total anthropogenic CO2 emissions over the decade 2009-2018. This sink estimate is based on simulation results from global ocean biogeochemicalmodels (GOBMs) and is com...
Published in: | Frontiers in Marine Science |
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Online Access: | https://archimer.ifremer.fr/doc/00676/78822/81139.pdf https://archimer.ifremer.fr/doc/00676/78822/81140.pdf https://doi.org/10.3389/fmars.2020.571720 https://archimer.ifremer.fr/doc/00676/78822/ |
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ftarchimer:oai:archimer.ifremer.fr:78822 2023-05-15T18:26:00+02:00 Consistency and Challenges in the Ocean Carbon Sink Estimate for the Global Carbon Budget Hauck, Judith Zeising, Moritz Le Quere, Corinne Gruber, Nicolas Bakker, Dorothee C. E. Bopp, Laurent Chau, Thi Tuyet Trang Guerses, Oezguer Ilyina, Tatiana Landschuetzer, Peter Lenton, Andrew Resplandy, Laure Roedenbeck, Christian Schwinger, Joerg Seferian, Roland 2020-10 application/pdf https://archimer.ifremer.fr/doc/00676/78822/81139.pdf https://archimer.ifremer.fr/doc/00676/78822/81140.pdf https://doi.org/10.3389/fmars.2020.571720 https://archimer.ifremer.fr/doc/00676/78822/ eng eng Frontiers Media Sa info:eu-repo/grantAgreement/EC/H2020/820989/EU//COMFORT info:eu-repo/grantAgreement/EC/H2020/730944/EU//RINGO https://archimer.ifremer.fr/doc/00676/78822/81139.pdf https://archimer.ifremer.fr/doc/00676/78822/81140.pdf doi:10.3389/fmars.2020.571720 https://archimer.ifremer.fr/doc/00676/78822/ info:eu-repo/semantics/openAccess restricted use Frontiers In Marine Science (2296-7745) (Frontiers Media Sa), 2020-10 , Vol. 7 , P. 571720 (22p.) ocean carbon uptake anthropogenic CO2 ocean carbon cycle model evaluation riverine carbon flux variability of the ocean carbon sink seasonal cycle text Publication info:eu-repo/semantics/article 2020 ftarchimer https://doi.org/10.3389/fmars.2020.571720 2023-01-17T23:50:42Z Based on the 2019 assessment of the Global Carbon Project, the ocean took up on average, 2.5 +/- 0.6 PgC yr(-1) or 23 +/- 5% of the total anthropogenic CO2 emissions over the decade 2009-2018. This sink estimate is based on simulation results from global ocean biogeochemicalmodels (GOBMs) and is compared to data-products based on observations of surface ocean pCO(2) (partial pressure of CO2) accounting for the outgassing of river-derived CO2. Here we evaluate the GOBM simulations by comparing the simulated surface ocean pCO(2) to observations. Based on this comparison, the simulations are well-suited for quantifying the global ocean carbon sink on the time-scale of the annual mean and its multi-decadal trend (RMSE <20 mu atm), as well as on the time-scale of multi-year variability (RMSE <10 mu atm), despite the large model-data mismatch on the seasonal time-scale (RMSE of 20-80 mu atm). Biases in GOBMs have a small effect on the global mean ocean sink (0.05 PgC yr(-1)), but need to be addressed to improve the regional budgets and model-data comparison. Accounting for non-mapped areas in the data-products reduces their spread as measured by the standard deviation by a third. There is growing evidence and consistency among methods with regard to the patterns of the multi-year variability of the ocean carbon sink, with a global stagnation in the 1990s and an extra-tropical strengthening in the 2000s. GOBMs and data-products point consistently to a shift from a tropical CO2 source to a CO2 sink in recent years. On average, the GOBMs reveal less variations in the sink than the data-based products. Despite the reasonable simulation of surface ocean pCO(2) by the GOBMs, there are discrepancies between the resulting sink estimate from GOBMs and data-products. These discrepancies are within the uncertainty of the river flux adjustment, increase over time, and largely stem from the Southern Ocean. Progress in our understanding of the global ocean carbon sink necessitates significant advancement in modeling and ... Article in Journal/Newspaper Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Southern Ocean Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) |
op_collection_id |
ftarchimer |
language |
English |
topic |
ocean carbon uptake anthropogenic CO2 ocean carbon cycle model evaluation riverine carbon flux variability of the ocean carbon sink seasonal cycle |
spellingShingle |
ocean carbon uptake anthropogenic CO2 ocean carbon cycle model evaluation riverine carbon flux variability of the ocean carbon sink seasonal cycle Hauck, Judith Zeising, Moritz Le Quere, Corinne Gruber, Nicolas Bakker, Dorothee C. E. Bopp, Laurent Chau, Thi Tuyet Trang Guerses, Oezguer Ilyina, Tatiana Landschuetzer, Peter Lenton, Andrew Resplandy, Laure Roedenbeck, Christian Schwinger, Joerg Seferian, Roland Consistency and Challenges in the Ocean Carbon Sink Estimate for the Global Carbon Budget |
topic_facet |
ocean carbon uptake anthropogenic CO2 ocean carbon cycle model evaluation riverine carbon flux variability of the ocean carbon sink seasonal cycle |
description |
Based on the 2019 assessment of the Global Carbon Project, the ocean took up on average, 2.5 +/- 0.6 PgC yr(-1) or 23 +/- 5% of the total anthropogenic CO2 emissions over the decade 2009-2018. This sink estimate is based on simulation results from global ocean biogeochemicalmodels (GOBMs) and is compared to data-products based on observations of surface ocean pCO(2) (partial pressure of CO2) accounting for the outgassing of river-derived CO2. Here we evaluate the GOBM simulations by comparing the simulated surface ocean pCO(2) to observations. Based on this comparison, the simulations are well-suited for quantifying the global ocean carbon sink on the time-scale of the annual mean and its multi-decadal trend (RMSE <20 mu atm), as well as on the time-scale of multi-year variability (RMSE <10 mu atm), despite the large model-data mismatch on the seasonal time-scale (RMSE of 20-80 mu atm). Biases in GOBMs have a small effect on the global mean ocean sink (0.05 PgC yr(-1)), but need to be addressed to improve the regional budgets and model-data comparison. Accounting for non-mapped areas in the data-products reduces their spread as measured by the standard deviation by a third. There is growing evidence and consistency among methods with regard to the patterns of the multi-year variability of the ocean carbon sink, with a global stagnation in the 1990s and an extra-tropical strengthening in the 2000s. GOBMs and data-products point consistently to a shift from a tropical CO2 source to a CO2 sink in recent years. On average, the GOBMs reveal less variations in the sink than the data-based products. Despite the reasonable simulation of surface ocean pCO(2) by the GOBMs, there are discrepancies between the resulting sink estimate from GOBMs and data-products. These discrepancies are within the uncertainty of the river flux adjustment, increase over time, and largely stem from the Southern Ocean. Progress in our understanding of the global ocean carbon sink necessitates significant advancement in modeling and ... |
format |
Article in Journal/Newspaper |
author |
Hauck, Judith Zeising, Moritz Le Quere, Corinne Gruber, Nicolas Bakker, Dorothee C. E. Bopp, Laurent Chau, Thi Tuyet Trang Guerses, Oezguer Ilyina, Tatiana Landschuetzer, Peter Lenton, Andrew Resplandy, Laure Roedenbeck, Christian Schwinger, Joerg Seferian, Roland |
author_facet |
Hauck, Judith Zeising, Moritz Le Quere, Corinne Gruber, Nicolas Bakker, Dorothee C. E. Bopp, Laurent Chau, Thi Tuyet Trang Guerses, Oezguer Ilyina, Tatiana Landschuetzer, Peter Lenton, Andrew Resplandy, Laure Roedenbeck, Christian Schwinger, Joerg Seferian, Roland |
author_sort |
Hauck, Judith |
title |
Consistency and Challenges in the Ocean Carbon Sink Estimate for the Global Carbon Budget |
title_short |
Consistency and Challenges in the Ocean Carbon Sink Estimate for the Global Carbon Budget |
title_full |
Consistency and Challenges in the Ocean Carbon Sink Estimate for the Global Carbon Budget |
title_fullStr |
Consistency and Challenges in the Ocean Carbon Sink Estimate for the Global Carbon Budget |
title_full_unstemmed |
Consistency and Challenges in the Ocean Carbon Sink Estimate for the Global Carbon Budget |
title_sort |
consistency and challenges in the ocean carbon sink estimate for the global carbon budget |
publisher |
Frontiers Media Sa |
publishDate |
2020 |
url |
https://archimer.ifremer.fr/doc/00676/78822/81139.pdf https://archimer.ifremer.fr/doc/00676/78822/81140.pdf https://doi.org/10.3389/fmars.2020.571720 https://archimer.ifremer.fr/doc/00676/78822/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Frontiers In Marine Science (2296-7745) (Frontiers Media Sa), 2020-10 , Vol. 7 , P. 571720 (22p.) |
op_relation |
info:eu-repo/grantAgreement/EC/H2020/820989/EU//COMFORT info:eu-repo/grantAgreement/EC/H2020/730944/EU//RINGO https://archimer.ifremer.fr/doc/00676/78822/81139.pdf https://archimer.ifremer.fr/doc/00676/78822/81140.pdf doi:10.3389/fmars.2020.571720 https://archimer.ifremer.fr/doc/00676/78822/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.3389/fmars.2020.571720 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766207790104182784 |