What causes the inverse relationship between primary production and export efficiency in the Southern Ocean?
The ocean contributes to regulating atmospheric CO2 levels, partly via variability in the fraction of primary production (PP) which is exported out of the surface layer (i.e., the e ratio). Southern Ocean studies have found that contrary to global-scale analyses, an inverse relationship exists betwe...
Published in: | Geophysical Research Letters |
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2016
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Online Access: | https://oceanrep.geomar.de/id/eprint/32903/ https://oceanrep.geomar.de/id/eprint/32903/7/grl54298%281%29.pdf https://doi.org/10.1002/2016GL068480 |
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ftoceanrep:oai:oceanrep.geomar.de:32903 2023-05-15T18:24:24+02:00 What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? Le Moigne, Frederic A. C. Henson, Stephanie A. Cavan, Emma Georges, Clément Pabortsava, Katsiaryna Achterberg, Eric P. Ceballos-Romero, Elena Zubkov, Mike Sanders, Richard J. 2016-05-16 text https://oceanrep.geomar.de/id/eprint/32903/ https://oceanrep.geomar.de/id/eprint/32903/7/grl54298%281%29.pdf https://doi.org/10.1002/2016GL068480 en eng AGU (American Geophysical Union) Wiley https://oceanrep.geomar.de/id/eprint/32903/7/grl54298%281%29.pdf Le Moigne, F. A. C. , Henson, S. A., Cavan, E., Georges, C., Pabortsava, K., Achterberg, E. P. , Ceballos-Romero, E., Zubkov, M. and Sanders, R. J. (2016) What causes the inverse relationship between primary production and export efficiency in the Southern Ocean?. Open Access Geophysical Research Letters, 43 (9). pp. 4457-4466. DOI 10.1002/2016GL068480 <https://doi.org/10.1002/2016GL068480>. doi:10.1002/2016GL068480 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2016 ftoceanrep https://doi.org/10.1002/2016GL068480 2023-04-07T15:25:37Z The ocean contributes to regulating atmospheric CO2 levels, partly via variability in the fraction of primary production (PP) which is exported out of the surface layer (i.e., the e ratio). Southern Ocean studies have found that contrary to global-scale analyses, an inverse relationship exists between e ratio and PP. This relationship remains unexplained, with potential hypotheses being (i) large export of dissolved organic carbon (DOC) in high PP areas, (ii) strong surface microbial recycling in high PP regions, and/or (iii) grazing-mediated export that varies inversely with PP. We find that the export of DOC has a limited influence in setting the negative e ratio/PP relationship. However, we observed that at sites with low PP and high e ratios, zooplankton-mediated export is large and surface microbial abundance low suggesting that both are important drivers of the magnitude of the e ratio in the Southern Ocean. Article in Journal/Newspaper Southern Ocean OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Southern Ocean Geophysical Research Letters 43 9 4457 4466 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The ocean contributes to regulating atmospheric CO2 levels, partly via variability in the fraction of primary production (PP) which is exported out of the surface layer (i.e., the e ratio). Southern Ocean studies have found that contrary to global-scale analyses, an inverse relationship exists between e ratio and PP. This relationship remains unexplained, with potential hypotheses being (i) large export of dissolved organic carbon (DOC) in high PP areas, (ii) strong surface microbial recycling in high PP regions, and/or (iii) grazing-mediated export that varies inversely with PP. We find that the export of DOC has a limited influence in setting the negative e ratio/PP relationship. However, we observed that at sites with low PP and high e ratios, zooplankton-mediated export is large and surface microbial abundance low suggesting that both are important drivers of the magnitude of the e ratio in the Southern Ocean. |
format |
Article in Journal/Newspaper |
author |
Le Moigne, Frederic A. C. Henson, Stephanie A. Cavan, Emma Georges, Clément Pabortsava, Katsiaryna Achterberg, Eric P. Ceballos-Romero, Elena Zubkov, Mike Sanders, Richard J. |
spellingShingle |
Le Moigne, Frederic A. C. Henson, Stephanie A. Cavan, Emma Georges, Clément Pabortsava, Katsiaryna Achterberg, Eric P. Ceballos-Romero, Elena Zubkov, Mike Sanders, Richard J. What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? |
author_facet |
Le Moigne, Frederic A. C. Henson, Stephanie A. Cavan, Emma Georges, Clément Pabortsava, Katsiaryna Achterberg, Eric P. Ceballos-Romero, Elena Zubkov, Mike Sanders, Richard J. |
author_sort |
Le Moigne, Frederic A. C. |
title |
What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? |
title_short |
What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? |
title_full |
What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? |
title_fullStr |
What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? |
title_full_unstemmed |
What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? |
title_sort |
what causes the inverse relationship between primary production and export efficiency in the southern ocean? |
publisher |
AGU (American Geophysical Union) |
publishDate |
2016 |
url |
https://oceanrep.geomar.de/id/eprint/32903/ https://oceanrep.geomar.de/id/eprint/32903/7/grl54298%281%29.pdf https://doi.org/10.1002/2016GL068480 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://oceanrep.geomar.de/id/eprint/32903/7/grl54298%281%29.pdf Le Moigne, F. A. C. , Henson, S. A., Cavan, E., Georges, C., Pabortsava, K., Achterberg, E. P. , Ceballos-Romero, E., Zubkov, M. and Sanders, R. J. (2016) What causes the inverse relationship between primary production and export efficiency in the Southern Ocean?. Open Access Geophysical Research Letters, 43 (9). pp. 4457-4466. DOI 10.1002/2016GL068480 <https://doi.org/10.1002/2016GL068480>. doi:10.1002/2016GL068480 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1002/2016GL068480 |
container_title |
Geophysical Research Letters |
container_volume |
43 |
container_issue |
9 |
container_start_page |
4457 |
op_container_end_page |
4466 |
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1766204897812807680 |