What causes the inverse relationship between primary production and export efficiency in the Southern Ocean?
International audience The ocean contributes to regulating atmospheric CO 2 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 r...
Published in: | Geophysical Research Letters |
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Online Access: | https://hal.archives-ouvertes.fr/hal-02345498 https://hal.archives-ouvertes.fr/hal-02345498/document https://hal.archives-ouvertes.fr/hal-02345498/file/2016GL068480.pdf https://doi.org/10.1002/2016GL068480 |
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ftccsdartic:oai:HAL:hal-02345498v1 2023-05-15T18:24:31+02:00 What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? Le Moigne, Frédéric A.C. Henson, Stephanie Cavan, Emma Georges, Clément Pabortsava, Katsiaryna Achterberg, Eric Ceballos-Romero, Elena Zubkov, Mike Sanders, Richard National Oceanography Centre Southampton (NOC) University of Southampton Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Centre National de la Recherche Scientifique (CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut national des sciences de l'Univers (INSU - CNRS) Helmholtz Centre for Ocean Research Kiel (GEOMAR) 2016-05-16 https://hal.archives-ouvertes.fr/hal-02345498 https://hal.archives-ouvertes.fr/hal-02345498/document https://hal.archives-ouvertes.fr/hal-02345498/file/2016GL068480.pdf https://doi.org/10.1002/2016GL068480 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1002/2016GL068480 hal-02345498 https://hal.archives-ouvertes.fr/hal-02345498 https://hal.archives-ouvertes.fr/hal-02345498/document https://hal.archives-ouvertes.fr/hal-02345498/file/2016GL068480.pdf doi:10.1002/2016GL068480 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-02345498 Geophysical Research Letters, American Geophysical Union, 2016, 43 (9), pp.4457-4466. ⟨10.1002/2016GL068480⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2016 ftccsdartic https://doi.org/10.1002/2016GL068480 2021-11-27T23:51:36Z International audience The ocean contributes to regulating atmospheric CO 2 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 Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Southern Ocean Geophysical Research Letters 43 9 4457 4466 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Le Moigne, Frédéric A.C. Henson, Stephanie Cavan, Emma Georges, Clément Pabortsava, Katsiaryna Achterberg, Eric Ceballos-Romero, Elena Zubkov, Mike Sanders, Richard What causes the inverse relationship between primary production and export efficiency in the Southern Ocean? |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The ocean contributes to regulating atmospheric CO 2 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. |
author2 |
National Oceanography Centre Southampton (NOC) University of Southampton Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 (LOG) Centre National de la Recherche Scientifique (CNRS)-Université du Littoral Côte d'Opale (ULCO)-Université de Lille-Institut national des sciences de l'Univers (INSU - CNRS) Helmholtz Centre for Ocean Research Kiel (GEOMAR) |
format |
Article in Journal/Newspaper |
author |
Le Moigne, Frédéric A.C. Henson, Stephanie Cavan, Emma Georges, Clément Pabortsava, Katsiaryna Achterberg, Eric Ceballos-Romero, Elena Zubkov, Mike Sanders, Richard |
author_facet |
Le Moigne, Frédéric A.C. Henson, Stephanie Cavan, Emma Georges, Clément Pabortsava, Katsiaryna Achterberg, Eric Ceballos-Romero, Elena Zubkov, Mike Sanders, Richard |
author_sort |
Le Moigne, Frédéric 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 |
HAL CCSD |
publishDate |
2016 |
url |
https://hal.archives-ouvertes.fr/hal-02345498 https://hal.archives-ouvertes.fr/hal-02345498/document https://hal.archives-ouvertes.fr/hal-02345498/file/2016GL068480.pdf https://doi.org/10.1002/2016GL068480 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.archives-ouvertes.fr/hal-02345498 Geophysical Research Letters, American Geophysical Union, 2016, 43 (9), pp.4457-4466. ⟨10.1002/2016GL068480⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/2016GL068480 hal-02345498 https://hal.archives-ouvertes.fr/hal-02345498 https://hal.archives-ouvertes.fr/hal-02345498/document https://hal.archives-ouvertes.fr/hal-02345498/file/2016GL068480.pdf doi:10.1002/2016GL068480 |
op_rights |
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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1766205130002137088 |