Reconciling Observation and Model Trends in North Atlantic Surface CO2
The North Atlantic Ocean is a region of intense uptake of atmospheric CO2. To assess how this CO2 sink has evolved over recent decades, various approaches have been used to estimate basin-wide uptake from the irregularly sampled in situ CO2 observations. Until now, the lack of robust uncertainties a...
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Amer Geophysical Union
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ftarchimer:oai:archimer.ifremer.fr:78721 2023-05-15T17:27:12+02:00 Reconciling Observation and Model Trends in North Atlantic Surface CO2 Lebehot, Alice D. Halloran, Paul Richard Watson, Andrew J. Mcneall, Doug Ford, David A. Landschuetzer, Peter Lauvset, Siv K. Schuster, Ute 2019-10 application/pdf https://archimer.ifremer.fr/doc/00675/78721/81005.pdf https://archimer.ifremer.fr/doc/00675/78721/81006.pdf https://doi.org/10.1029/2019GB006186 https://archimer.ifremer.fr/doc/00675/78721/ eng eng Amer Geophysical Union https://archimer.ifremer.fr/doc/00675/78721/81005.pdf https://archimer.ifremer.fr/doc/00675/78721/81006.pdf doi:10.1029/2019GB006186 https://archimer.ifremer.fr/doc/00675/78721/ info:eu-repo/semantics/openAccess restricted use Global Biogeochemical Cycles (0886-6236) (Amer Geophysical Union), 2019-10 , Vol. 33 , N. 10 , P. 1204-1222 text Publication info:eu-repo/semantics/article 2019 ftarchimer https://doi.org/10.1029/2019GB006186 2021-09-23T20:36:48Z The North Atlantic Ocean is a region of intense uptake of atmospheric CO2. To assess how this CO2 sink has evolved over recent decades, various approaches have been used to estimate basin-wide uptake from the irregularly sampled in situ CO2 observations. Until now, the lack of robust uncertainties associated with observation-based gap-filling methods required to produce these estimates has limited the capacity to validate climate model simulated surface ocean CO2 concentrations. After robustly quantifying basin-wide and annually varying interpolation uncertainties using both observational and model data, we show that the North Atlantic surface ocean fugacity of CO2 (fCO(2-ocean)) increased at a significantly slower rate than that simulated by the latest generation of Earth System Models during the period 1992-2014. We further show, with initialized model simulations, that the inability of these models to capture the observed trend in surface fCO(2-ocean) is primarily due to biases in the models' ocean biogeochemistry. Our results imply that current projections may underestimate the contribution of the North Atlantic to mitigating increasing future atmospheric CO2 concentrations. Article in Journal/Newspaper North Atlantic Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Global Biogeochemical Cycles 33 10 1204 1222 |
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 |
description |
The North Atlantic Ocean is a region of intense uptake of atmospheric CO2. To assess how this CO2 sink has evolved over recent decades, various approaches have been used to estimate basin-wide uptake from the irregularly sampled in situ CO2 observations. Until now, the lack of robust uncertainties associated with observation-based gap-filling methods required to produce these estimates has limited the capacity to validate climate model simulated surface ocean CO2 concentrations. After robustly quantifying basin-wide and annually varying interpolation uncertainties using both observational and model data, we show that the North Atlantic surface ocean fugacity of CO2 (fCO(2-ocean)) increased at a significantly slower rate than that simulated by the latest generation of Earth System Models during the period 1992-2014. We further show, with initialized model simulations, that the inability of these models to capture the observed trend in surface fCO(2-ocean) is primarily due to biases in the models' ocean biogeochemistry. Our results imply that current projections may underestimate the contribution of the North Atlantic to mitigating increasing future atmospheric CO2 concentrations. |
format |
Article in Journal/Newspaper |
author |
Lebehot, Alice D. Halloran, Paul Richard Watson, Andrew J. Mcneall, Doug Ford, David A. Landschuetzer, Peter Lauvset, Siv K. Schuster, Ute |
spellingShingle |
Lebehot, Alice D. Halloran, Paul Richard Watson, Andrew J. Mcneall, Doug Ford, David A. Landschuetzer, Peter Lauvset, Siv K. Schuster, Ute Reconciling Observation and Model Trends in North Atlantic Surface CO2 |
author_facet |
Lebehot, Alice D. Halloran, Paul Richard Watson, Andrew J. Mcneall, Doug Ford, David A. Landschuetzer, Peter Lauvset, Siv K. Schuster, Ute |
author_sort |
Lebehot, Alice D. |
title |
Reconciling Observation and Model Trends in North Atlantic Surface CO2 |
title_short |
Reconciling Observation and Model Trends in North Atlantic Surface CO2 |
title_full |
Reconciling Observation and Model Trends in North Atlantic Surface CO2 |
title_fullStr |
Reconciling Observation and Model Trends in North Atlantic Surface CO2 |
title_full_unstemmed |
Reconciling Observation and Model Trends in North Atlantic Surface CO2 |
title_sort |
reconciling observation and model trends in north atlantic surface co2 |
publisher |
Amer Geophysical Union |
publishDate |
2019 |
url |
https://archimer.ifremer.fr/doc/00675/78721/81005.pdf https://archimer.ifremer.fr/doc/00675/78721/81006.pdf https://doi.org/10.1029/2019GB006186 https://archimer.ifremer.fr/doc/00675/78721/ |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Global Biogeochemical Cycles (0886-6236) (Amer Geophysical Union), 2019-10 , Vol. 33 , N. 10 , P. 1204-1222 |
op_relation |
https://archimer.ifremer.fr/doc/00675/78721/81005.pdf https://archimer.ifremer.fr/doc/00675/78721/81006.pdf doi:10.1029/2019GB006186 https://archimer.ifremer.fr/doc/00675/78721/ |
op_rights |
info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1029/2019GB006186 |
container_title |
Global Biogeochemical Cycles |
container_volume |
33 |
container_issue |
10 |
container_start_page |
1204 |
op_container_end_page |
1222 |
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1766119147827101696 |