Interannual variability of the oceanic sink of CO2 from 1979 through 1997
We have estimated the interannual variability in the oceanic sink of CO2 with a three-dimensional global-scale model which includes ocean circulation and simple biogeochemistry. The model was forced from 1979 to 1997 by a combination of daily to weekly data from the European Centre for Medium-Range...
Published in: | Global Biogeochemical Cycles |
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ftuniveastangl:oai:ueaeprints.uea.ac.uk:32688 2023-05-15T14:02:39+02:00 Interannual variability of the oceanic sink of CO2 from 1979 through 1997 Le Quéré, Corinne Orr, James C. Monfray, Patrick Aumont, Oliver Madec, Gurvan 2000 https://ueaeprints.uea.ac.uk/id/eprint/32688/ https://doi.org/10.1029/1999GB900049 unknown Le Quéré, Corinne, Orr, James C., Monfray, Patrick, Aumont, Oliver and Madec, Gurvan (2000) Interannual variability of the oceanic sink of CO2 from 1979 through 1997. Global Biogeochemical Cycles, 14 (4). pp. 1247-1265. ISSN 0886-6236 doi:10.1029/1999GB900049 Article PeerReviewed 2000 ftuniveastangl https://doi.org/10.1029/1999GB900049 2023-03-23T23:31:45Z We have estimated the interannual variability in the oceanic sink of CO2 with a three-dimensional global-scale model which includes ocean circulation and simple biogeochemistry. The model was forced from 1979 to 1997 by a combination of daily to weekly data from the European Centre for Medium-Range Weather Forecast and the National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis as well as European Remote Sensing satellite observations. For this period, the ocean sink of CO2 is estimated to vary between 1.4 and 2.2 Pg C yr-1, as a result of annually averaged interannual variability of ±0.4 Pg C yr-1 that fluctuates about a mean of 1.8 Pg C yr-1. Our interannual variability roughly agrees in amplitude with previous ocean-based estimates but is 2 to 4 times less than estimates based on atmospheric observations. About 70% of the global variance in our modeled flux of CO2 originated in the equatorial Pacific. In that region, our modeled variability in the flux of CO2 generally agreed with that observed to ±0.1 Pg C yr-1. The predominance of the equatorial Pacific for interannual variability is caused by three factors: (1) interannual variability associated with El Niño events occurs in phase over the entire basin, whereas elsewhere positive and negative anomalies partly cancel each other out (e.g., for events such as Antarctic Circumpolar Wave and the North Atlantic Oscillation); (2) dynamic processes dominate in the equatorial Pacific, whereas dynamic, thermodynamic, and biological processes partly cancel one another at higher latitudes; and (3) our model underestimates the variability in ocean dynamics and biology at high latitudes. Article in Journal/Newspaper Antarc* Antarctic North Atlantic North Atlantic oscillation University of East Anglia: UEA Digital Repository Antarctic Pacific Global Biogeochemical Cycles 14 4 1247 1265 |
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Open Polar |
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University of East Anglia: UEA Digital Repository |
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ftuniveastangl |
language |
unknown |
description |
We have estimated the interannual variability in the oceanic sink of CO2 with a three-dimensional global-scale model which includes ocean circulation and simple biogeochemistry. The model was forced from 1979 to 1997 by a combination of daily to weekly data from the European Centre for Medium-Range Weather Forecast and the National Centers for Environmental Prediction/National Center for Atmospheric Research reanalysis as well as European Remote Sensing satellite observations. For this period, the ocean sink of CO2 is estimated to vary between 1.4 and 2.2 Pg C yr-1, as a result of annually averaged interannual variability of ±0.4 Pg C yr-1 that fluctuates about a mean of 1.8 Pg C yr-1. Our interannual variability roughly agrees in amplitude with previous ocean-based estimates but is 2 to 4 times less than estimates based on atmospheric observations. About 70% of the global variance in our modeled flux of CO2 originated in the equatorial Pacific. In that region, our modeled variability in the flux of CO2 generally agreed with that observed to ±0.1 Pg C yr-1. The predominance of the equatorial Pacific for interannual variability is caused by three factors: (1) interannual variability associated with El Niño events occurs in phase over the entire basin, whereas elsewhere positive and negative anomalies partly cancel each other out (e.g., for events such as Antarctic Circumpolar Wave and the North Atlantic Oscillation); (2) dynamic processes dominate in the equatorial Pacific, whereas dynamic, thermodynamic, and biological processes partly cancel one another at higher latitudes; and (3) our model underestimates the variability in ocean dynamics and biology at high latitudes. |
format |
Article in Journal/Newspaper |
author |
Le Quéré, Corinne Orr, James C. Monfray, Patrick Aumont, Oliver Madec, Gurvan |
spellingShingle |
Le Quéré, Corinne Orr, James C. Monfray, Patrick Aumont, Oliver Madec, Gurvan Interannual variability of the oceanic sink of CO2 from 1979 through 1997 |
author_facet |
Le Quéré, Corinne Orr, James C. Monfray, Patrick Aumont, Oliver Madec, Gurvan |
author_sort |
Le Quéré, Corinne |
title |
Interannual variability of the oceanic sink of CO2 from 1979 through 1997 |
title_short |
Interannual variability of the oceanic sink of CO2 from 1979 through 1997 |
title_full |
Interannual variability of the oceanic sink of CO2 from 1979 through 1997 |
title_fullStr |
Interannual variability of the oceanic sink of CO2 from 1979 through 1997 |
title_full_unstemmed |
Interannual variability of the oceanic sink of CO2 from 1979 through 1997 |
title_sort |
interannual variability of the oceanic sink of co2 from 1979 through 1997 |
publishDate |
2000 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/32688/ https://doi.org/10.1029/1999GB900049 |
geographic |
Antarctic Pacific |
geographic_facet |
Antarctic Pacific |
genre |
Antarc* Antarctic North Atlantic North Atlantic oscillation |
genre_facet |
Antarc* Antarctic North Atlantic North Atlantic oscillation |
op_relation |
Le Quéré, Corinne, Orr, James C., Monfray, Patrick, Aumont, Oliver and Madec, Gurvan (2000) Interannual variability of the oceanic sink of CO2 from 1979 through 1997. Global Biogeochemical Cycles, 14 (4). pp. 1247-1265. ISSN 0886-6236 doi:10.1029/1999GB900049 |
op_doi |
https://doi.org/10.1029/1999GB900049 |
container_title |
Global Biogeochemical Cycles |
container_volume |
14 |
container_issue |
4 |
container_start_page |
1247 |
op_container_end_page |
1265 |
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1766273007489122304 |