Recent variability of the global ocean carbon sink
We present a new observation-based estimate of the global oceanic carbon dioxide (CO2) sink and its temporal variation on a monthly basis from 1998 through 2011 and at a spatial resolution of 1 degrees x1 degrees. This sink estimate rests upon a neural network-based mapping of global surface ocean o...
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ftarchimer:oai:archimer.ifremer.fr:40345 2023-05-15T15:00:43+02:00 Recent variability of the global ocean carbon sink Landschuetzer, P. Gruber, N. Bakker, D. C. E. Schuster, U. 2014-09 application/pdf https://archimer.ifremer.fr/doc/00292/40345/38920.pdf https://doi.org/10.1002/2014GB004853 https://archimer.ifremer.fr/doc/00292/40345/ eng eng Amer Geophysical Union info:eu-repo/grantAgreement/EC/FP7/264879/EU//CARBOCHANGE https://archimer.ifremer.fr/doc/00292/40345/38920.pdf doi:10.1002/2014GB004853 https://archimer.ifremer.fr/doc/00292/40345/ 2014. American Geophysical Union. All Rights Reserved info:eu-repo/semantics/openAccess restricted use Global Biogeochemical Cycles (0886-6236) (Amer Geophysical Union), 2014-09 , Vol. 28 , N. 9 , P. 927-949 sea surface pCO(2) neural network air-sea exchange of CO2 ocean carbon cycle observations text Publication info:eu-repo/semantics/article 2014 ftarchimer https://doi.org/10.1002/2014GB004853 2021-09-23T20:26:57Z We present a new observation-based estimate of the global oceanic carbon dioxide (CO2) sink and its temporal variation on a monthly basis from 1998 through 2011 and at a spatial resolution of 1 degrees x1 degrees. This sink estimate rests upon a neural network-based mapping of global surface ocean observations of the partial pressure of CO2 (pCO(2)) from the Surface Ocean CO2 Atlas database. The resulting pCO(2) has small biases when evaluated against independent observations in the different ocean basins, but larger randomly distributed differences exist particularly in high latitudes. The seasonal climatology of our neural network-based product agrees overall well with the Takahashi et al. (2009) climatology, although our product produces a stronger seasonal cycle at high latitudes. From our global pCO(2) product, we compute a mean net global ocean (excluding the Arctic Ocean and coastal regions) CO2 uptake flux of -1.42 0.53 Pg C yr(-1), which is in good agreement with ocean inversion-based estimates. Our data indicate a moderate level of interannual variability in the ocean carbon sink (0.12 Pg C yr(-1), 1 sigma) from 1998 through 2011, mostly originating from the equatorial Pacific Ocean, and associated with the El Nino-Southern Oscillation. Accounting for steady state riverine and Arctic Ocean carbon fluxes our estimate further implies a mean anthropogenic CO2 uptake of -1.99 0.59 Pg C yr(-1) over the analysis period. From this estimate plus the most recent estimates for fossil fuel emissions and atmospheric CO2 accumulation, we infer a mean global land sink of -2.82 0.85 Pg C yr(-1) over the 1998 through 2011 period with strong interannual variation. Article in Journal/Newspaper Arctic Arctic Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Arctic Arctic Ocean Pacific Global Biogeochemical Cycles 28 9 927 949 |
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 |
sea surface pCO(2) neural network air-sea exchange of CO2 ocean carbon cycle observations |
spellingShingle |
sea surface pCO(2) neural network air-sea exchange of CO2 ocean carbon cycle observations Landschuetzer, P. Gruber, N. Bakker, D. C. E. Schuster, U. Recent variability of the global ocean carbon sink |
topic_facet |
sea surface pCO(2) neural network air-sea exchange of CO2 ocean carbon cycle observations |
description |
We present a new observation-based estimate of the global oceanic carbon dioxide (CO2) sink and its temporal variation on a monthly basis from 1998 through 2011 and at a spatial resolution of 1 degrees x1 degrees. This sink estimate rests upon a neural network-based mapping of global surface ocean observations of the partial pressure of CO2 (pCO(2)) from the Surface Ocean CO2 Atlas database. The resulting pCO(2) has small biases when evaluated against independent observations in the different ocean basins, but larger randomly distributed differences exist particularly in high latitudes. The seasonal climatology of our neural network-based product agrees overall well with the Takahashi et al. (2009) climatology, although our product produces a stronger seasonal cycle at high latitudes. From our global pCO(2) product, we compute a mean net global ocean (excluding the Arctic Ocean and coastal regions) CO2 uptake flux of -1.42 0.53 Pg C yr(-1), which is in good agreement with ocean inversion-based estimates. Our data indicate a moderate level of interannual variability in the ocean carbon sink (0.12 Pg C yr(-1), 1 sigma) from 1998 through 2011, mostly originating from the equatorial Pacific Ocean, and associated with the El Nino-Southern Oscillation. Accounting for steady state riverine and Arctic Ocean carbon fluxes our estimate further implies a mean anthropogenic CO2 uptake of -1.99 0.59 Pg C yr(-1) over the analysis period. From this estimate plus the most recent estimates for fossil fuel emissions and atmospheric CO2 accumulation, we infer a mean global land sink of -2.82 0.85 Pg C yr(-1) over the 1998 through 2011 period with strong interannual variation. |
format |
Article in Journal/Newspaper |
author |
Landschuetzer, P. Gruber, N. Bakker, D. C. E. Schuster, U. |
author_facet |
Landschuetzer, P. Gruber, N. Bakker, D. C. E. Schuster, U. |
author_sort |
Landschuetzer, P. |
title |
Recent variability of the global ocean carbon sink |
title_short |
Recent variability of the global ocean carbon sink |
title_full |
Recent variability of the global ocean carbon sink |
title_fullStr |
Recent variability of the global ocean carbon sink |
title_full_unstemmed |
Recent variability of the global ocean carbon sink |
title_sort |
recent variability of the global ocean carbon sink |
publisher |
Amer Geophysical Union |
publishDate |
2014 |
url |
https://archimer.ifremer.fr/doc/00292/40345/38920.pdf https://doi.org/10.1002/2014GB004853 https://archimer.ifremer.fr/doc/00292/40345/ |
geographic |
Arctic Arctic Ocean Pacific |
geographic_facet |
Arctic Arctic Ocean Pacific |
genre |
Arctic Arctic Ocean |
genre_facet |
Arctic Arctic Ocean |
op_source |
Global Biogeochemical Cycles (0886-6236) (Amer Geophysical Union), 2014-09 , Vol. 28 , N. 9 , P. 927-949 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/264879/EU//CARBOCHANGE https://archimer.ifremer.fr/doc/00292/40345/38920.pdf doi:10.1002/2014GB004853 https://archimer.ifremer.fr/doc/00292/40345/ |
op_rights |
2014. American Geophysical Union. All Rights Reserved info:eu-repo/semantics/openAccess restricted use |
op_doi |
https://doi.org/10.1002/2014GB004853 |
container_title |
Global Biogeochemical Cycles |
container_volume |
28 |
container_issue |
9 |
container_start_page |
927 |
op_container_end_page |
949 |
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1766332787101532160 |