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) towards its high-index polarity. The positive phase of the SAM is characterised 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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Online Access: | https://epic.awi.de/id/eprint/34456/ https://epic.awi.de/id/eprint/34456/1/Hauck13b_GCB.pdf http://onlinelibrary.wiley.com/doi/10.1002/2013GB004600/abstract;jsessionid=11FF53DC4AF0CAABC7883C488E6936A5.f02t02 https://hdl.handle.net/10013/epic.43061 https://hdl.handle.net/10013/epic.43061.d001 |
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ftawi:oai:epic.awi.de:34456 2024-09-15T18:37:04+00:00 Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode Hauck, Judith Völker, Christoph Wang, Tingting Hoppema, Mario Losch, Martin Wolf-Gladrow, Dieter A. 2014-01-16 application/pdf https://epic.awi.de/id/eprint/34456/ https://epic.awi.de/id/eprint/34456/1/Hauck13b_GCB.pdf http://onlinelibrary.wiley.com/doi/10.1002/2013GB004600/abstract;jsessionid=11FF53DC4AF0CAABC7883C488E6936A5.f02t02 https://hdl.handle.net/10013/epic.43061 https://hdl.handle.net/10013/epic.43061.d001 unknown Wiley https://epic.awi.de/id/eprint/34456/1/Hauck13b_GCB.pdf https://hdl.handle.net/10013/epic.43061.d001 Hauck, J. orcid:0000-0003-4723-9652 , Völker, C. orcid:0000-0003-3032-114X , Wang, T. , Hoppema, M. orcid:0000-0002-2326-619X , Losch, M. orcid:0000-0002-3824-5244 and Wolf-Gladrow, D. A. orcid:0000-0001-9531-8668 (2014) Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode , Global Biogeochemical Cycles, 27 (4), pp. 1236-1245 . doi:10.1002/2013GB004600 <https://doi.org/10.1002/2013GB004600> , hdl:10013/epic.43061 EPIC3Global Biogeochemical Cycles, Wiley, 27(4), pp. 1236-1245, ISSN: 0886-6236 Article isiRev 2014 ftawi https://doi.org/10.1002/2013GB004600 2024-06-24T04:08:32Z Stratospheric ozone depletion and emission of greenhouse gases lead to a trend of the Southern Annular Mode (SAM) towards its high-index polarity. The positive phase of the SAM is characterised 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 Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Global Biogeochemical Cycles 27 4 1236 1245 |
institution |
Open Polar |
collection |
Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
op_collection_id |
ftawi |
language |
unknown |
description |
Stratospheric ozone depletion and emission of greenhouse gases lead to a trend of the Southern Annular Mode (SAM) towards its high-index polarity. The positive phase of the SAM is characterised 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, Judith Völker, Christoph Wang, Tingting Hoppema, Mario Losch, Martin Wolf-Gladrow, Dieter A. |
spellingShingle |
Hauck, Judith Völker, Christoph Wang, Tingting Hoppema, Mario Losch, Martin Wolf-Gladrow, Dieter A. Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode |
author_facet |
Hauck, Judith Völker, Christoph Wang, Tingting Hoppema, Mario Losch, Martin Wolf-Gladrow, Dieter A. |
author_sort |
Hauck, Judith |
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 |
Wiley |
publishDate |
2014 |
url |
https://epic.awi.de/id/eprint/34456/ https://epic.awi.de/id/eprint/34456/1/Hauck13b_GCB.pdf http://onlinelibrary.wiley.com/doi/10.1002/2013GB004600/abstract;jsessionid=11FF53DC4AF0CAABC7883C488E6936A5.f02t02 https://hdl.handle.net/10013/epic.43061 https://hdl.handle.net/10013/epic.43061.d001 |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
EPIC3Global Biogeochemical Cycles, Wiley, 27(4), pp. 1236-1245, ISSN: 0886-6236 |
op_relation |
https://epic.awi.de/id/eprint/34456/1/Hauck13b_GCB.pdf https://hdl.handle.net/10013/epic.43061.d001 Hauck, J. orcid:0000-0003-4723-9652 , Völker, C. orcid:0000-0003-3032-114X , Wang, T. , Hoppema, M. orcid:0000-0002-2326-619X , Losch, M. orcid:0000-0002-3824-5244 and Wolf-Gladrow, D. A. orcid:0000-0001-9531-8668 (2014) Seasonally different carbon flux changes in the Southern Ocean in response to the southern annular mode , Global Biogeochemical Cycles, 27 (4), pp. 1236-1245 . doi:10.1002/2013GB004600 <https://doi.org/10.1002/2013GB004600> , hdl:10013/epic.43061 |
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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1810481388879609856 |