Atlantic Water Modification North of Svalbard in the Mercator Physical System From 2007 to 2020
International audience The Atlantic Water (AW) inflow through Fram Strait, largest oceanic heat source to the Arctic Ocean, undergoes substantial modifications in the Western Nansen Basin (WNB). Evaluation of the Mercator system in the WNB, using 1,500 independent temperature‐salinity profiles and f...
Published in: | Journal of Geophysical Research: Oceans |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2020
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Subjects: | |
Online Access: | https://hal.science/hal-02955836 https://hal.science/hal-02955836/document https://hal.science/hal-02955836/file/Athanase2020JC016463.pdf https://doi.org/10.1029/2020JC016463 |
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openpolar |
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Open Polar |
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HAL de l'Institut Polytechnique de Paris |
op_collection_id |
ftinspolytechpar |
language |
English |
topic |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Athanase, Marylou Provost, Christine Pérez Hernández, María Dolores Sennéchael, Nathalie Bertosio, Cécilia Artana, Camila Garric, Gilles Lellouche, Jean-Michel Atlantic Water Modification North of Svalbard in the Mercator Physical System From 2007 to 2020 |
topic_facet |
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
International audience The Atlantic Water (AW) inflow through Fram Strait, largest oceanic heat source to the Arctic Ocean, undergoes substantial modifications in the Western Nansen Basin (WNB). Evaluation of the Mercator system in the WNB, using 1,500 independent temperature‐salinity profiles and five years of mooring data, highlighted its performance in representing realistic AW inflow and hydrographic properties. In particular, favorable comparisons with mooring time‐series documenting deep winter mixed layers and changes in AW properties led us to examine winter conditions in the WNB over the 2007–2020 period. The model helped describe the interannual variations of winter mixed layers and documented several processes at stake in modifying AW beyond winter convection: trough outflows and lateral exchange through vigorous eddies. Recently modified AW, either via local convection or trough outflows, were identified as homogeneous layers of low buoyancy frequency. Over the 2007–2020 period, two winters stood out with extreme deep mixed layers in areas that used to be ice‐covered: 2017/18 over the northern Yermak Plateau‐Sofia Deep; 2012/13 on the continental slope northeast of Svalbard with the coldest and freshest modified AW of the 12‐year time series. The northern Yermak Plateau‐Sofia Deep and continental slope areas became “Marginal Convection Zones” in 2011 with, from then on, occasionally ice‐free conditions, 50‐m‐ocean temperatures always above 0 °C and highly variable mixed layer depths and ocean‐to‐atmosphere heat fluxes. In the WNB where observations require considerable efforts and resources, the Mercator system proved to be a good tool to assess Atlantic Water modifications in winter. |
author2 |
Austral, Boréal et Carbone (ABC) 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)-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)) 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) Universidad de las Palmas de Gran Canaria (ULPGC) Mercator Océan Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Service hydrographique et océanographique de la Marine-Centre National de la Recherche Scientifique (CNRS)-Météo-France IAOOS A18JROI002 Sorbonne Université ANR-14-AORS-0003,PAN-ARCTIC OPTIONS,PAN-ARTIC OPTIONS: HOLISTIC INTEGRATION FOR ARCTIC COASTAL-MARINE SUSTAINABILITY(2014) |
format |
Article in Journal/Newspaper |
author |
Athanase, Marylou Provost, Christine Pérez Hernández, María Dolores Sennéchael, Nathalie Bertosio, Cécilia Artana, Camila Garric, Gilles Lellouche, Jean-Michel |
author_facet |
Athanase, Marylou Provost, Christine Pérez Hernández, María Dolores Sennéchael, Nathalie Bertosio, Cécilia Artana, Camila Garric, Gilles Lellouche, Jean-Michel |
author_sort |
Athanase, Marylou |
title |
Atlantic Water Modification North of Svalbard in the Mercator Physical System From 2007 to 2020 |
title_short |
Atlantic Water Modification North of Svalbard in the Mercator Physical System From 2007 to 2020 |
title_full |
Atlantic Water Modification North of Svalbard in the Mercator Physical System From 2007 to 2020 |
title_fullStr |
Atlantic Water Modification North of Svalbard in the Mercator Physical System From 2007 to 2020 |
title_full_unstemmed |
Atlantic Water Modification North of Svalbard in the Mercator Physical System From 2007 to 2020 |
title_sort |
atlantic water modification north of svalbard in the mercator physical system from 2007 to 2020 |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-02955836 https://hal.science/hal-02955836/document https://hal.science/hal-02955836/file/Athanase2020JC016463.pdf https://doi.org/10.1029/2020JC016463 |
genre |
Arctic Arctic Ocean Fram Strait Nansen Basin Svalbard Yermak plateau |
genre_facet |
Arctic Arctic Ocean Fram Strait Nansen Basin Svalbard Yermak plateau |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-02955836 Journal of Geophysical Research. Oceans, 2020, 125 (10), pp.e2020JC016463. ⟨10.1029/2020JC016463⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2020JC016463 hal-02955836 https://hal.science/hal-02955836 https://hal.science/hal-02955836/document https://hal.science/hal-02955836/file/Athanase2020JC016463.pdf doi:10.1029/2020JC016463 WOS: 000612077200020 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2020JC016463 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
10 |
_version_ |
1799475760310779904 |
spelling |
ftinspolytechpar:oai:HAL:hal-02955836v1 2024-05-19T07:36:38+00:00 Atlantic Water Modification North of Svalbard in the Mercator Physical System From 2007 to 2020 Athanase, Marylou Provost, Christine Pérez Hernández, María Dolores Sennéchael, Nathalie Bertosio, Cécilia Artana, Camila Garric, Gilles Lellouche, Jean-Michel Austral, Boréal et Carbone (ABC) 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)-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)) 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) Universidad de las Palmas de Gran Canaria (ULPGC) Mercator Océan Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Service hydrographique et océanographique de la Marine-Centre National de la Recherche Scientifique (CNRS)-Météo-France IAOOS A18JROI002 Sorbonne Université ANR-14-AORS-0003,PAN-ARCTIC OPTIONS,PAN-ARTIC OPTIONS: HOLISTIC INTEGRATION FOR ARCTIC COASTAL-MARINE SUSTAINABILITY(2014) 2020 https://hal.science/hal-02955836 https://hal.science/hal-02955836/document https://hal.science/hal-02955836/file/Athanase2020JC016463.pdf https://doi.org/10.1029/2020JC016463 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2020JC016463 hal-02955836 https://hal.science/hal-02955836 https://hal.science/hal-02955836/document https://hal.science/hal-02955836/file/Athanase2020JC016463.pdf doi:10.1029/2020JC016463 WOS: 000612077200020 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-02955836 Journal of Geophysical Research. Oceans, 2020, 125 (10), pp.e2020JC016463. ⟨10.1029/2020JC016463⟩ [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2020 ftinspolytechpar https://doi.org/10.1029/2020JC016463 2024-04-22T01:48:17Z International audience The Atlantic Water (AW) inflow through Fram Strait, largest oceanic heat source to the Arctic Ocean, undergoes substantial modifications in the Western Nansen Basin (WNB). Evaluation of the Mercator system in the WNB, using 1,500 independent temperature‐salinity profiles and five years of mooring data, highlighted its performance in representing realistic AW inflow and hydrographic properties. In particular, favorable comparisons with mooring time‐series documenting deep winter mixed layers and changes in AW properties led us to examine winter conditions in the WNB over the 2007–2020 period. The model helped describe the interannual variations of winter mixed layers and documented several processes at stake in modifying AW beyond winter convection: trough outflows and lateral exchange through vigorous eddies. Recently modified AW, either via local convection or trough outflows, were identified as homogeneous layers of low buoyancy frequency. Over the 2007–2020 period, two winters stood out with extreme deep mixed layers in areas that used to be ice‐covered: 2017/18 over the northern Yermak Plateau‐Sofia Deep; 2012/13 on the continental slope northeast of Svalbard with the coldest and freshest modified AW of the 12‐year time series. The northern Yermak Plateau‐Sofia Deep and continental slope areas became “Marginal Convection Zones” in 2011 with, from then on, occasionally ice‐free conditions, 50‐m‐ocean temperatures always above 0 °C and highly variable mixed layer depths and ocean‐to‐atmosphere heat fluxes. In the WNB where observations require considerable efforts and resources, the Mercator system proved to be a good tool to assess Atlantic Water modifications in winter. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Nansen Basin Svalbard Yermak plateau HAL de l'Institut Polytechnique de Paris Journal of Geophysical Research: Oceans 125 10 |