Stirring of the northeast Atlantic spring bloom: A Lagrangian analysis based on multisatellite data
International audience The effect of the geostrophic stirring on phytoplankton variability during the northeast Atlantic spring bloom is studied by analyzing satellite derived surface chlorophyll, sea surface temperature, and sea surface height. The calculation of unstable manifolds is used as a dia...
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
2007
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Online Access: | https://hal.science/hal-00770691 https://hal.science/hal-00770691/document https://hal.science/hal-00770691/file/2006JC003927.pdf https://doi.org/10.1029/2006JC003927 |
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HAL Sorbonne Université |
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ftsorbonneuniv |
language |
English |
topic |
Lyapunov exponents spring bloom stirring [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
Lyapunov exponents spring bloom stirring [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Lehahn, Yoav d'Ovidio, Francesco Lévy, Marina Heifetz, Eyal Stirring of the northeast Atlantic spring bloom: A Lagrangian analysis based on multisatellite data |
topic_facet |
Lyapunov exponents spring bloom stirring [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience The effect of the geostrophic stirring on phytoplankton variability during the northeast Atlantic spring bloom is studied by analyzing satellite derived surface chlorophyll, sea surface temperature, and sea surface height. The calculation of unstable manifolds is used as a diagnostic of the transport properties of the geostrophic velocity field (calculated from the sea surface height). We identify two mechanisms by which the geostrophic velocity field acts on chlorophyll patterns. The first mechanism is a direct effect of the horizontal transport on already formed chlorophyll. By acting as ''sticking'' transport barriers, the unstable manifolds are shown to (1) modulate the fronts of already formed phytoplankton in lobular structures, (2) create spiralling chlorophyll anomalies within eddies, and (3) produce chlorophyll filaments. The second mechanism is an indirect effect on in situ chlorophyll production mediated by nutrient upwelling. Supported by a recent study on the vertical velocities of the northeast Atlantic (Legal et al., 2006), we argue that the horizontal unstable manifolds also shape the filamentary, vertical velocity cells, and hence the patterns of in situ produced chlorophyll through submesoscale vertical nutrient injection. |
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)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Department of Geophysical, Atmospheric and Planetary Sciences Tel Aviv (TAU) Tel Aviv University (TAU) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) |
format |
Article in Journal/Newspaper |
author |
Lehahn, Yoav d'Ovidio, Francesco Lévy, Marina Heifetz, Eyal |
author_facet |
Lehahn, Yoav d'Ovidio, Francesco Lévy, Marina Heifetz, Eyal |
author_sort |
Lehahn, Yoav |
title |
Stirring of the northeast Atlantic spring bloom: A Lagrangian analysis based on multisatellite data |
title_short |
Stirring of the northeast Atlantic spring bloom: A Lagrangian analysis based on multisatellite data |
title_full |
Stirring of the northeast Atlantic spring bloom: A Lagrangian analysis based on multisatellite data |
title_fullStr |
Stirring of the northeast Atlantic spring bloom: A Lagrangian analysis based on multisatellite data |
title_full_unstemmed |
Stirring of the northeast Atlantic spring bloom: A Lagrangian analysis based on multisatellite data |
title_sort |
stirring of the northeast atlantic spring bloom: a lagrangian analysis based on multisatellite data |
publisher |
HAL CCSD |
publishDate |
2007 |
url |
https://hal.science/hal-00770691 https://hal.science/hal-00770691/document https://hal.science/hal-00770691/file/2006JC003927.pdf https://doi.org/10.1029/2006JC003927 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_source |
ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00770691 Journal of Geophysical Research, 2007, 112, pp.C08005. ⟨10.1029/2006JC003927⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2006JC003927 hal-00770691 https://hal.science/hal-00770691 https://hal.science/hal-00770691/document https://hal.science/hal-00770691/file/2006JC003927.pdf BIBCODE: 2007JGRC.11208005L doi:10.1029/2006JC003927 IRD: fdi:010071496 WOS: 000248601600002 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2006JC003927 |
container_title |
Journal of Geophysical Research |
container_volume |
112 |
container_issue |
C8 |
_version_ |
1801380220884746240 |
spelling |
ftsorbonneuniv:oai:HAL:hal-00770691v1 2024-06-09T07:48:29+00:00 Stirring of the northeast Atlantic spring bloom: A Lagrangian analysis based on multisatellite data Lehahn, Yoav d'Ovidio, Francesco Lévy, Marina Heifetz, Eyal Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Department of Geophysical, Atmospheric and Planetary Sciences Tel Aviv (TAU) Tel Aviv University (TAU) Laboratoire de Météorologie Dynamique (UMR 8539) (LMD) Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-École des Ponts ParisTech (ENPC)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Département des Géosciences - ENS Paris Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL) 2007-08 https://hal.science/hal-00770691 https://hal.science/hal-00770691/document https://hal.science/hal-00770691/file/2006JC003927.pdf https://doi.org/10.1029/2006JC003927 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2006JC003927 hal-00770691 https://hal.science/hal-00770691 https://hal.science/hal-00770691/document https://hal.science/hal-00770691/file/2006JC003927.pdf BIBCODE: 2007JGRC.11208005L doi:10.1029/2006JC003927 IRD: fdi:010071496 WOS: 000248601600002 info:eu-repo/semantics/OpenAccess ISSN: 0148-0227 EISSN: 2156-2202 Journal of Geophysical Research https://hal.science/hal-00770691 Journal of Geophysical Research, 2007, 112, pp.C08005. ⟨10.1029/2006JC003927⟩ Lyapunov exponents spring bloom stirring [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2007 ftsorbonneuniv https://doi.org/10.1029/2006JC003927 2024-05-16T23:55:21Z International audience The effect of the geostrophic stirring on phytoplankton variability during the northeast Atlantic spring bloom is studied by analyzing satellite derived surface chlorophyll, sea surface temperature, and sea surface height. The calculation of unstable manifolds is used as a diagnostic of the transport properties of the geostrophic velocity field (calculated from the sea surface height). We identify two mechanisms by which the geostrophic velocity field acts on chlorophyll patterns. The first mechanism is a direct effect of the horizontal transport on already formed chlorophyll. By acting as ''sticking'' transport barriers, the unstable manifolds are shown to (1) modulate the fronts of already formed phytoplankton in lobular structures, (2) create spiralling chlorophyll anomalies within eddies, and (3) produce chlorophyll filaments. The second mechanism is an indirect effect on in situ chlorophyll production mediated by nutrient upwelling. Supported by a recent study on the vertical velocities of the northeast Atlantic (Legal et al., 2006), we argue that the horizontal unstable manifolds also shape the filamentary, vertical velocity cells, and hence the patterns of in situ produced chlorophyll through submesoscale vertical nutrient injection. Article in Journal/Newspaper Northeast Atlantic HAL Sorbonne Université Journal of Geophysical Research 112 C8 |