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...
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Online Access: | http://nora.nerc.ac.uk/id/eprint/513350/ https://nora.nerc.ac.uk/id/eprint/513350/1/grl54298.pdf https://doi.org/10.1002/2016GL068480 |
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ftnerc:oai:nora.nerc.ac.uk:513350 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 http://nora.nerc.ac.uk/id/eprint/513350/ https://nora.nerc.ac.uk/id/eprint/513350/1/grl54298.pdf https://doi.org/10.1002/2016GL068480 en eng https://nora.nerc.ac.uk/id/eprint/513350/1/grl54298.pdf Le Moigne, Frederic A.C.; Henson, Stephanie A. orcid:0000-0002-3875-6802 Cavan, Emma; Georges, Clément; Pabortsava, Katsiaryna; Achterberg, Eric P.; Ceballos-Romero, Elena; Zubkov, Mike; Sanders, Richard J. orcid:0000-0002-6884-7131 . 2016 What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? Geophysical Research Letters, 43 (9). 4457-4466. https://doi.org/10.1002/2016GL068480 <https://doi.org/10.1002/2016GL068480> cc_by_4 CC-BY Publication - Article PeerReviewed 2016 ftnerc https://doi.org/10.1002/2016GL068480 2023-02-04T19:42:55Z 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 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 Natural Environment Research Council: NERC Open Research Archive Southern Ocean Geophysical Research Letters 43 9 4457 4466 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
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ftnerc |
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 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? |
publishDate |
2016 |
url |
http://nora.nerc.ac.uk/id/eprint/513350/ https://nora.nerc.ac.uk/id/eprint/513350/1/grl54298.pdf https://doi.org/10.1002/2016GL068480 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_relation |
https://nora.nerc.ac.uk/id/eprint/513350/1/grl54298.pdf Le Moigne, Frederic A.C.; Henson, Stephanie A. orcid:0000-0002-3875-6802 Cavan, Emma; Georges, Clément; Pabortsava, Katsiaryna; Achterberg, Eric P.; Ceballos-Romero, Elena; Zubkov, Mike; Sanders, Richard J. orcid:0000-0002-6884-7131 . 2016 What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? Geophysical Research Letters, 43 (9). 4457-4466. https://doi.org/10.1002/2016GL068480 <https://doi.org/10.1002/2016GL068480> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/2016GL068480 |
container_title |
Geophysical Research Letters |
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43 |
container_issue |
9 |
container_start_page |
4457 |
op_container_end_page |
4466 |
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1766204897225605120 |