Impact of the subtropical mode water biogeochemical properties on primary production in the North Atlantic: New insights from an idealized model study.
International audience An idealized biophysical model of the North Atlantic was designed to investigate the setting and variability of the subtropical mode water (STMW) biogeochemical properties and its impact on surface primary production in the North Atlantic. The model solution first emphasizes t...
Published in: | Journal of Geophysical Research |
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Main Authors: | , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2009
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Online Access: | https://hal.science/hal-00413625 https://hal.science/hal-00413625/document https://hal.science/hal-00413625/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202009%20-%20Kr%20meur%20-%20Impact%20of%20the%20subtropical%20mode%20water%20biogeochemical%20properties.pdf https://doi.org/10.1029/2008JC005161 |
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ftuniversailles:oai:HAL:hal-00413625v1 |
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openpolar |
institution |
Open Polar |
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Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ |
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ftuniversailles |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Krémeur, Anne-Sophie Lévy, Marina Aumont, Olivier Reverdin, Gilles Impact of the subtropical mode water biogeochemical properties on primary production in the North Atlantic: New insights from an idealized model study. |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience An idealized biophysical model of the North Atlantic was designed to investigate the setting and variability of the subtropical mode water (STMW) biogeochemical properties and its impact on surface primary production in the North Atlantic. The model solution first emphasizes that the exact timing of STMW formation versus the timing of the spring bloom is of primary importance for setting the STMW biogeochemical properties. The surface primary production reaches its maximum in March in the STMW formation region just before its subduction. Thus the spring bloom consumes nitrate at the surface before STMW subducts, and STMW leaves the upper layers depleted in nutrients and fueled in organic matter. This spring consumption explains the low nutrient content of STMW observed near its source region by J. B. Palter et al. (2005). Furthermore, the model suggests that STMW plays a key role in exporting dissolved organic matter (DOM) at subsurface. The spring bloom produces a significant amount of DOM sequestrated in the mode waters after its subduction. This large pool of DOM is then remineralized with time along the transit of STMW through the subtropical gyre. Consequently, the nutrient content of STMW increases as it moves away from its source region. Finally, the model shows also that STMW is very important in controlling primary production in the western boundary current (WBC) region. Indeed, STMW remains isolated from the surface along its trajectory within the subtropical gyre. It joins the mixed layer by obduction in the WBC region only. This nutrient-rich old STMW irrigates and fertilizes the euphotic zone primarily in the WBC and then spreads along the boundary between the two gyres by advection. |
author2 |
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Institut de Recherche pour le Développement (IRD France-Ouest ) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Krémeur, Anne-Sophie Lévy, Marina Aumont, Olivier Reverdin, Gilles |
author_facet |
Krémeur, Anne-Sophie Lévy, Marina Aumont, Olivier Reverdin, Gilles |
author_sort |
Krémeur, Anne-Sophie |
title |
Impact of the subtropical mode water biogeochemical properties on primary production in the North Atlantic: New insights from an idealized model study. |
title_short |
Impact of the subtropical mode water biogeochemical properties on primary production in the North Atlantic: New insights from an idealized model study. |
title_full |
Impact of the subtropical mode water biogeochemical properties on primary production in the North Atlantic: New insights from an idealized model study. |
title_fullStr |
Impact of the subtropical mode water biogeochemical properties on primary production in the North Atlantic: New insights from an idealized model study. |
title_full_unstemmed |
Impact of the subtropical mode water biogeochemical properties on primary production in the North Atlantic: New insights from an idealized model study. |
title_sort |
impact of the subtropical mode water biogeochemical properties on primary production in the north atlantic: new insights from an idealized model study. |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.science/hal-00413625 https://hal.science/hal-00413625/document https://hal.science/hal-00413625/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202009%20-%20Kr%20meur%20-%20Impact%20of%20the%20subtropical%20mode%20water%20biogeochemical%20properties.pdf https://doi.org/10.1029/2008JC005161 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-00413625 Journal of Geophysical Research. Oceans, 2009, 114, pp.C07019. ⟨10.1029/2008JC005161⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2008JC005161 hal-00413625 https://hal.science/hal-00413625 https://hal.science/hal-00413625/document https://hal.science/hal-00413625/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202009%20-%20Kr%20meur%20-%20Impact%20of%20the%20subtropical%20mode%20water%20biogeochemical%20properties.pdf doi:10.1029/2008JC005161 IRD: fdi:010081439 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2008JC005161 |
container_title |
Journal of Geophysical Research |
container_volume |
114 |
container_issue |
C7 |
_version_ |
1799484637258448896 |
spelling |
ftuniversailles:oai:HAL:hal-00413625v1 2024-05-19T07:44:47+00:00 Impact of the subtropical mode water biogeochemical properties on primary production in the North Atlantic: New insights from an idealized model study. Krémeur, Anne-Sophie Lévy, Marina Aumont, Olivier Reverdin, Gilles Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Institut de Recherche pour le Développement (IRD France-Ouest ) Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) 2009 https://hal.science/hal-00413625 https://hal.science/hal-00413625/document https://hal.science/hal-00413625/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202009%20-%20Kr%20meur%20-%20Impact%20of%20the%20subtropical%20mode%20water%20biogeochemical%20properties.pdf https://doi.org/10.1029/2008JC005161 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2008JC005161 hal-00413625 https://hal.science/hal-00413625 https://hal.science/hal-00413625/document https://hal.science/hal-00413625/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202009%20-%20Kr%20meur%20-%20Impact%20of%20the%20subtropical%20mode%20water%20biogeochemical%20properties.pdf doi:10.1029/2008JC005161 IRD: fdi:010081439 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-00413625 Journal of Geophysical Research. Oceans, 2009, 114, pp.C07019. ⟨10.1029/2008JC005161⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2009 ftuniversailles https://doi.org/10.1029/2008JC005161 2024-04-25T00:23:41Z International audience An idealized biophysical model of the North Atlantic was designed to investigate the setting and variability of the subtropical mode water (STMW) biogeochemical properties and its impact on surface primary production in the North Atlantic. The model solution first emphasizes that the exact timing of STMW formation versus the timing of the spring bloom is of primary importance for setting the STMW biogeochemical properties. The surface primary production reaches its maximum in March in the STMW formation region just before its subduction. Thus the spring bloom consumes nitrate at the surface before STMW subducts, and STMW leaves the upper layers depleted in nutrients and fueled in organic matter. This spring consumption explains the low nutrient content of STMW observed near its source region by J. B. Palter et al. (2005). Furthermore, the model suggests that STMW plays a key role in exporting dissolved organic matter (DOM) at subsurface. The spring bloom produces a significant amount of DOM sequestrated in the mode waters after its subduction. This large pool of DOM is then remineralized with time along the transit of STMW through the subtropical gyre. Consequently, the nutrient content of STMW increases as it moves away from its source region. Finally, the model shows also that STMW is very important in controlling primary production in the western boundary current (WBC) region. Indeed, STMW remains isolated from the surface along its trajectory within the subtropical gyre. It joins the mixed layer by obduction in the WBC region only. This nutrient-rich old STMW irrigates and fertilizes the euphotic zone primarily in the WBC and then spreads along the boundary between the two gyres by advection. Article in Journal/Newspaper North Atlantic Université de Versailles Saint-Quentin-en-Yvelines: HAL-UVSQ Journal of Geophysical Research 114 C7 |