The intra-seasonal dynamics of the mixed layer pump in the subpolar North Atlantic Ocean: a BGC-Argo float approach
International audience The detrainment of organic matter from the mixed layer, a process known as the mixed layer pump (ML pump), has long been overlooked in carbon export budgets. Recently, the ML pump has been investigated at seasonal scale and appeared to contribute significantly to particulate o...
Published in: | Global Biogeochemical Cycles |
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Online Access: | https://hal.sorbonne-universite.fr/hal-02337414 https://hal.sorbonne-universite.fr/hal-02337414/document https://hal.sorbonne-universite.fr/hal-02337414/file/Lacour%20et%20al.%20-%202019%20-%20The%20Intraseasonal%20Dynamics%20of%20the%20Mixed%20Layer%20Pump.pdf https://doi.org/10.1029/2018GB005997 |
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ftinsu:oai:HAL:hal-02337414v1 2023-12-03T10:26:43+01:00 The intra-seasonal dynamics of the mixed layer pump in the subpolar North Atlantic Ocean: a BGC-Argo float approach Lacour, L. Briggs, N. Claustre, Hervé Ardyna, M. Dall'Olmo, G. Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) National Oceanography Centre (NOC) Stanford University Plymouth Marine Laboratory (PML) 2019 https://hal.sorbonne-universite.fr/hal-02337414 https://hal.sorbonne-universite.fr/hal-02337414/document https://hal.sorbonne-universite.fr/hal-02337414/file/Lacour%20et%20al.%20-%202019%20-%20The%20Intraseasonal%20Dynamics%20of%20the%20Mixed%20Layer%20Pump.pdf https://doi.org/10.1029/2018GB005997 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2018GB005997 hal-02337414 https://hal.sorbonne-universite.fr/hal-02337414 https://hal.sorbonne-universite.fr/hal-02337414/document https://hal.sorbonne-universite.fr/hal-02337414/file/Lacour%20et%20al.%20-%202019%20-%20The%20Intraseasonal%20Dynamics%20of%20the%20Mixed%20Layer%20Pump.pdf doi:10.1029/2018GB005997 info:eu-repo/semantics/OpenAccess ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.sorbonne-universite.fr/hal-02337414 Global Biogeochemical Cycles, 2019, 33 (3), pp.266-281. ⟨10.1029/2018GB005997⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry info:eu-repo/semantics/article Journal articles 2019 ftinsu https://doi.org/10.1029/2018GB005997 2023-11-08T17:30:19Z International audience The detrainment of organic matter from the mixed layer, a process known as the mixed layer pump (ML pump), has long been overlooked in carbon export budgets. Recently, the ML pump has been investigated at seasonal scale and appeared to contribute significantly to particulate organic carbon export to the mesopelagic zone, especially at high latitudes where seasonal variations of the mixed layer depth are large. However, the dynamics of the ML pump at intraseasonal scales remains poorly known, mainly because the lack of observational tools suited to studying such dynamics. In the present study, using a dense network of autonomous profiling floats equipped with bio‐optical sensors, we captured widespread episodic ML pump‐driven export events, during the winter and early spring period, in a large part of the subpolar North Atlantic Ocean. The intraseasonal dynamics of the ML pump exports fresh organic material to depth (basin‐scale average up to 55 mg C·m−2·day−1), providing a significant source of energy to the mesopelagic food web before the spring bloom period. This mechanism may sustain the seasonal development of overwintering organisms such as copepods with potential impact on the characteristics of the forthcoming spring phytoplankton bloom through predator‐prey interactions. Article in Journal/Newspaper North Atlantic Copepods Institut national des sciences de l'Univers: HAL-INSU Global Biogeochemical Cycles 33 3 266 281 |
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Open Polar |
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Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry Lacour, L. Briggs, N. Claustre, Hervé Ardyna, M. Dall'Olmo, G. The intra-seasonal dynamics of the mixed layer pump in the subpolar North Atlantic Ocean: a BGC-Argo float approach |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry |
description |
International audience The detrainment of organic matter from the mixed layer, a process known as the mixed layer pump (ML pump), has long been overlooked in carbon export budgets. Recently, the ML pump has been investigated at seasonal scale and appeared to contribute significantly to particulate organic carbon export to the mesopelagic zone, especially at high latitudes where seasonal variations of the mixed layer depth are large. However, the dynamics of the ML pump at intraseasonal scales remains poorly known, mainly because the lack of observational tools suited to studying such dynamics. In the present study, using a dense network of autonomous profiling floats equipped with bio‐optical sensors, we captured widespread episodic ML pump‐driven export events, during the winter and early spring period, in a large part of the subpolar North Atlantic Ocean. The intraseasonal dynamics of the ML pump exports fresh organic material to depth (basin‐scale average up to 55 mg C·m−2·day−1), providing a significant source of energy to the mesopelagic food web before the spring bloom period. This mechanism may sustain the seasonal development of overwintering organisms such as copepods with potential impact on the characteristics of the forthcoming spring phytoplankton bloom through predator‐prey interactions. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) National Oceanography Centre (NOC) Stanford University Plymouth Marine Laboratory (PML) |
format |
Article in Journal/Newspaper |
author |
Lacour, L. Briggs, N. Claustre, Hervé Ardyna, M. Dall'Olmo, G. |
author_facet |
Lacour, L. Briggs, N. Claustre, Hervé Ardyna, M. Dall'Olmo, G. |
author_sort |
Lacour, L. |
title |
The intra-seasonal dynamics of the mixed layer pump in the subpolar North Atlantic Ocean: a BGC-Argo float approach |
title_short |
The intra-seasonal dynamics of the mixed layer pump in the subpolar North Atlantic Ocean: a BGC-Argo float approach |
title_full |
The intra-seasonal dynamics of the mixed layer pump in the subpolar North Atlantic Ocean: a BGC-Argo float approach |
title_fullStr |
The intra-seasonal dynamics of the mixed layer pump in the subpolar North Atlantic Ocean: a BGC-Argo float approach |
title_full_unstemmed |
The intra-seasonal dynamics of the mixed layer pump in the subpolar North Atlantic Ocean: a BGC-Argo float approach |
title_sort |
intra-seasonal dynamics of the mixed layer pump in the subpolar north atlantic ocean: a bgc-argo float approach |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.sorbonne-universite.fr/hal-02337414 https://hal.sorbonne-universite.fr/hal-02337414/document https://hal.sorbonne-universite.fr/hal-02337414/file/Lacour%20et%20al.%20-%202019%20-%20The%20Intraseasonal%20Dynamics%20of%20the%20Mixed%20Layer%20Pump.pdf https://doi.org/10.1029/2018GB005997 |
genre |
North Atlantic Copepods |
genre_facet |
North Atlantic Copepods |
op_source |
ISSN: 0886-6236 EISSN: 1944-8224 Global Biogeochemical Cycles https://hal.sorbonne-universite.fr/hal-02337414 Global Biogeochemical Cycles, 2019, 33 (3), pp.266-281. ⟨10.1029/2018GB005997⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2018GB005997 hal-02337414 https://hal.sorbonne-universite.fr/hal-02337414 https://hal.sorbonne-universite.fr/hal-02337414/document https://hal.sorbonne-universite.fr/hal-02337414/file/Lacour%20et%20al.%20-%202019%20-%20The%20Intraseasonal%20Dynamics%20of%20the%20Mixed%20Layer%20Pump.pdf doi:10.1029/2018GB005997 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2018GB005997 |
container_title |
Global Biogeochemical Cycles |
container_volume |
33 |
container_issue |
3 |
container_start_page |
266 |
op_container_end_page |
281 |
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1784276118148218880 |