Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode
Stratospheric ozone depletion and emission of greenhouse gases lead to a trend of the southern annular mode (SAM) toward its high-index polarity. The positive phase of the SAM is characterized by stronger than usual westerly winds that induce changes in the physical carbon transport. Changes in the...
Published in: | Global Biogeochemical Cycles |
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Amer Geophysical Union
2013
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ftarchimer:oai:archimer.ifremer.fr:40352 2023-05-15T18:24:48+02:00 Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode Hauck, J. Voelker, C. Wang, T. Hoppema, M. Losch, M. Wolf-gladrow, D. A. 2013-12 application/pdf https://archimer.ifremer.fr/doc/00292/40352/38988.pdf https://archimer.ifremer.fr/doc/00292/40352/38989.pdf https://archimer.ifremer.fr/doc/00292/40352/38990.pdf https://archimer.ifremer.fr/doc/00292/40352/38991.pdf https://doi.org/10.1002/2013GB004600 https://archimer.ifremer.fr/doc/00292/40352/ eng eng Amer Geophysical Union info:eu-repo/grantAgreement/EC/FP7/264879/EU//CARBOCHANGE https://archimer.ifremer.fr/doc/00292/40352/38988.pdf https://archimer.ifremer.fr/doc/00292/40352/38989.pdf https://archimer.ifremer.fr/doc/00292/40352/38990.pdf https://archimer.ifremer.fr/doc/00292/40352/38991.pdf doi:10.1002/2013GB004600 https://archimer.ifremer.fr/doc/00292/40352/ 2013 The Authors. Global Biogeochemical Cycles published byWiley on behalf of the American Geophysical Union. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. info:eu-repo/semantics/openAccess restricted use CC-BY-NC-ND Global Biogeochemical Cycles (0886-6236) (Amer Geophysical Union), 2013-12 , Vol. 27 , N. 4 , P. 1236-1245 Southern Ocean southern annular mode carbon cycle carbon sink text Publication info:eu-repo/semantics/article 2013 ftarchimer https://doi.org/10.1002/2013GB004600 2021-09-23T20:26:57Z Stratospheric ozone depletion and emission of greenhouse gases lead to a trend of the southern annular mode (SAM) toward its high-index polarity. The positive phase of the SAM is characterized by stronger than usual westerly winds that induce changes in the physical carbon transport. Changes in the natural carbon budget of the upper 100 m of the Southern Ocean in response to a positive SAM phase are explored with a coupled ecosystem-general circulation model and regression analysis. Previously overlooked processes that are important for the upper ocean carbon budget during a positive SAM period are identified, namely, export production and downward transport of carbon north of the polar front (PF) as large as the upwelling in the south. The limiting micronutrient iron is brought into the surface layer by upwelling and stimulates phytoplankton growth and export production but only in summer. This leads to a drawdown of carbon and less summertime outgassing (or more uptake) of natural CO2. In winter, biological mechanisms are inactive, and the surface ocean equilibrates with the atmosphere by releasing CO2. In the annual mean, the upper ocean region south of the PF loses more carbon by additional export production than by the release of CO2 into the atmosphere, highlighting the role of the biological carbon pump in response to a positive SAM event. Article in Journal/Newspaper Southern Ocean Archimer (Archive Institutionnelle de l'Ifremer - Institut français de recherche pour l'exploitation de la mer) Southern Ocean Global Biogeochemical Cycles 27 4 1236 1245 |
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 |
Southern Ocean southern annular mode carbon cycle carbon sink |
spellingShingle |
Southern Ocean southern annular mode carbon cycle carbon sink Hauck, J. Voelker, C. Wang, T. Hoppema, M. Losch, M. Wolf-gladrow, D. A. Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode |
topic_facet |
Southern Ocean southern annular mode carbon cycle carbon sink |
description |
Stratospheric ozone depletion and emission of greenhouse gases lead to a trend of the southern annular mode (SAM) toward its high-index polarity. The positive phase of the SAM is characterized by stronger than usual westerly winds that induce changes in the physical carbon transport. Changes in the natural carbon budget of the upper 100 m of the Southern Ocean in response to a positive SAM phase are explored with a coupled ecosystem-general circulation model and regression analysis. Previously overlooked processes that are important for the upper ocean carbon budget during a positive SAM period are identified, namely, export production and downward transport of carbon north of the polar front (PF) as large as the upwelling in the south. The limiting micronutrient iron is brought into the surface layer by upwelling and stimulates phytoplankton growth and export production but only in summer. This leads to a drawdown of carbon and less summertime outgassing (or more uptake) of natural CO2. In winter, biological mechanisms are inactive, and the surface ocean equilibrates with the atmosphere by releasing CO2. In the annual mean, the upper ocean region south of the PF loses more carbon by additional export production than by the release of CO2 into the atmosphere, highlighting the role of the biological carbon pump in response to a positive SAM event. |
format |
Article in Journal/Newspaper |
author |
Hauck, J. Voelker, C. Wang, T. Hoppema, M. Losch, M. Wolf-gladrow, D. A. |
author_facet |
Hauck, J. Voelker, C. Wang, T. Hoppema, M. Losch, M. Wolf-gladrow, D. A. |
author_sort |
Hauck, J. |
title |
Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode |
title_short |
Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode |
title_full |
Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode |
title_fullStr |
Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode |
title_full_unstemmed |
Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode |
title_sort |
seasonally different carbon flux changes in the southern ocean in response to the southern annular mode |
publisher |
Amer Geophysical Union |
publishDate |
2013 |
url |
https://archimer.ifremer.fr/doc/00292/40352/38988.pdf https://archimer.ifremer.fr/doc/00292/40352/38989.pdf https://archimer.ifremer.fr/doc/00292/40352/38990.pdf https://archimer.ifremer.fr/doc/00292/40352/38991.pdf https://doi.org/10.1002/2013GB004600 https://archimer.ifremer.fr/doc/00292/40352/ |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Global Biogeochemical Cycles (0886-6236) (Amer Geophysical Union), 2013-12 , Vol. 27 , N. 4 , P. 1236-1245 |
op_relation |
info:eu-repo/grantAgreement/EC/FP7/264879/EU//CARBOCHANGE https://archimer.ifremer.fr/doc/00292/40352/38988.pdf https://archimer.ifremer.fr/doc/00292/40352/38989.pdf https://archimer.ifremer.fr/doc/00292/40352/38990.pdf https://archimer.ifremer.fr/doc/00292/40352/38991.pdf doi:10.1002/2013GB004600 https://archimer.ifremer.fr/doc/00292/40352/ |
op_rights |
2013 The Authors. Global Biogeochemical Cycles published byWiley on behalf of the American Geophysical Union. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non-commercial and no modifications or adaptations are made. info:eu-repo/semantics/openAccess restricted use |
op_rightsnorm |
CC-BY-NC-ND |
op_doi |
https://doi.org/10.1002/2013GB004600 |
container_title |
Global Biogeochemical Cycles |
container_volume |
27 |
container_issue |
4 |
container_start_page |
1236 |
op_container_end_page |
1245 |
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1766205728438091776 |