Ice Shelf Basal Melt and Influence on Dense Water Outflow in the Southern Weddell Sea

International audience We use new observations of stable water isotopes from a research cruise in early 2017 to highlight ocean-ice interactions occurring under Filchner-Ronne Ice Shelf, the largest Antarctic ice shelf. In particular, we investigate the properties of Ice Shelf Water with temperature...

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Published in:Journal of Geophysical Research: Oceans
Main Authors: Akhoudas, Camille, Sallée, Jean-Baptiste, Reverdin, Gilles, Aloisi, Giovanni, Benetti, Marion, Vignes, Lucie, Gelado, Maria
Other Authors: Processus et interactions de fine échelle océanique (PROTEO), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), 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 de Paris (UP)-École normale supérieure - Paris (ENS Paris), 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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-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)-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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Institut de Physique du Globe de Paris, Institute of Earth Sciences Reykjavik, University of Iceland Reykjavik, Chemistry Department, University of Las Palmas de Gran Canaria, Las Palmas de GranCanaria, Spain, European Project: 637770,H2020,ERC-2014-STG,WAPITI(2015)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2020
Subjects:
Online Access:https://hal-insu.archives-ouvertes.fr/insu-02521455
https://hal-insu.archives-ouvertes.fr/insu-02521455/document
https://hal-insu.archives-ouvertes.fr/insu-02521455/file/2019JC015710%281%29.pdf
https://doi.org/10.1029/2019JC015710
id ftccsdartic:oai:HAL:insu-02521455v1
record_format openpolar
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]Sciences of the Universe [physics]
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
spellingShingle [SDU]Sciences of the Universe [physics]
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
Akhoudas, Camille
Sallée, Jean-Baptiste
Reverdin, Gilles
Aloisi, Giovanni
Benetti, Marion
Vignes, Lucie
Gelado, Maria
Ice Shelf Basal Melt and Influence on Dense Water Outflow in the Southern Weddell Sea
topic_facet [SDU]Sciences of the Universe [physics]
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean
Atmosphere
description International audience We use new observations of stable water isotopes from a research cruise in early 2017 to highlight ocean-ice interactions occurring under Filchner-Ronne Ice Shelf, the largest Antarctic ice shelf. In particular, we investigate the properties of Ice Shelf Water with temperature lower than the surface freezing point, in the Filchner Depression. We identify two main flavors of Ice Shelf Water emerging from beneath the Filchner Ice Shelf, which originate from High Salinity Shelf Water end members with distinct characteristics. Furthermore, these two High Salinity Shelf Water end members interact with areas of the ice shelves with different basal properties to produce different versions of Ice Shelf Water. These water masses are associated with different rates of basal melting and refreezing, which we quantify. Ice Shelf Water types that flow out of the ice shelf cavity are composed of 0.4% of mass from ice shelf (melt minus freeze) when sampled at the front of Filchner Ice Shelf. The slightly lighter Ice Shelf Water version mixes directly with ambient water masses as it flows northward on the continental shelf. The resulting Ice Shelf Water mixture with temperature below the surface freezing point ultimately sinks along the continental slope into the deep ocean, as a precursor of the Weddell Sea bottom waters.
author2 Processus et interactions de fine échelle océanique (PROTEO)
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN)
Institut Pierre-Simon-Laplace (IPSL (FR_636))
École normale supérieure - Paris (ENS Paris)
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 de Paris (UP)-École normale supérieure - Paris (ENS Paris)
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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-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)-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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)
Institut de Physique du Globe de Paris
Institute of Earth Sciences Reykjavik
University of Iceland Reykjavik
Chemistry Department, University of Las Palmas de Gran Canaria, Las Palmas de GranCanaria, Spain
European Project: 637770,H2020,ERC-2014-STG,WAPITI(2015)
format Article in Journal/Newspaper
author Akhoudas, Camille
Sallée, Jean-Baptiste
Reverdin, Gilles
Aloisi, Giovanni
Benetti, Marion
Vignes, Lucie
Gelado, Maria
author_facet Akhoudas, Camille
Sallée, Jean-Baptiste
Reverdin, Gilles
Aloisi, Giovanni
Benetti, Marion
Vignes, Lucie
Gelado, Maria
author_sort Akhoudas, Camille
title Ice Shelf Basal Melt and Influence on Dense Water Outflow in the Southern Weddell Sea
title_short Ice Shelf Basal Melt and Influence on Dense Water Outflow in the Southern Weddell Sea
title_full Ice Shelf Basal Melt and Influence on Dense Water Outflow in the Southern Weddell Sea
title_fullStr Ice Shelf Basal Melt and Influence on Dense Water Outflow in the Southern Weddell Sea
title_full_unstemmed Ice Shelf Basal Melt and Influence on Dense Water Outflow in the Southern Weddell Sea
title_sort ice shelf basal melt and influence on dense water outflow in the southern weddell sea
publisher HAL CCSD
publishDate 2020
url https://hal-insu.archives-ouvertes.fr/insu-02521455
https://hal-insu.archives-ouvertes.fr/insu-02521455/document
https://hal-insu.archives-ouvertes.fr/insu-02521455/file/2019JC015710%281%29.pdf
https://doi.org/10.1029/2019JC015710
long_lat ENVELOPE(-40.000,-40.000,-79.000,-79.000)
ENVELOPE(-61.000,-61.000,-78.500,-78.500)
geographic Antarctic
Filchner Ice Shelf
Ronne Ice Shelf
Weddell
Weddell Sea
geographic_facet Antarctic
Filchner Ice Shelf
Ronne Ice Shelf
Weddell
Weddell Sea
genre Antarc*
Antarctic
Filchner Ronne Ice Shelf
Filchner-Ronne Ice Shelf
Ice Shelf
Ice Shelves
Ronne Ice Shelf
Weddell Sea
genre_facet Antarc*
Antarctic
Filchner Ronne Ice Shelf
Filchner-Ronne Ice Shelf
Ice Shelf
Ice Shelves
Ronne Ice Shelf
Weddell Sea
op_source ISSN: 2169-9275
EISSN: 2169-9291
Journal of Geophysical Research. Oceans
https://hal-insu.archives-ouvertes.fr/insu-02521455
Journal of Geophysical Research. Oceans, Wiley-Blackwell, 2020, 125 (2), pp.e2019JC015710. ⟨10.1029/2019JC015710⟩
op_relation info:eu-repo/semantics/altIdentifier/doi/10.1029/2019JC015710
info:eu-repo/grantAgreement//637770/EU/Water-mass transformation and Pathways In The Weddell Sea: uncovering the dynamics of a global climate chokepoint from In-situ measurements/WAPITI
insu-02521455
https://hal-insu.archives-ouvertes.fr/insu-02521455
https://hal-insu.archives-ouvertes.fr/insu-02521455/document
https://hal-insu.archives-ouvertes.fr/insu-02521455/file/2019JC015710%281%29.pdf
doi:10.1029/2019JC015710
WOS: 000530025600025
op_rights info:eu-repo/semantics/OpenAccess
op_doi https://doi.org/10.1029/2019JC015710
container_title Journal of Geophysical Research: Oceans
container_volume 125
container_issue 2
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spelling ftccsdartic:oai:HAL:insu-02521455v1 2023-05-15T13:36:11+02:00 Ice Shelf Basal Melt and Influence on Dense Water Outflow in the Southern Weddell Sea Akhoudas, Camille Sallée, Jean-Baptiste Reverdin, Gilles Aloisi, Giovanni Benetti, Marion Vignes, Lucie Gelado, Maria Processus et interactions de fine échelle océanique (PROTEO) Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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 de Paris (UP)-École normale supérieure - Paris (ENS Paris) 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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-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)-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 de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU) Institut de Physique du Globe de Paris Institute of Earth Sciences Reykjavik University of Iceland Reykjavik Chemistry Department, University of Las Palmas de Gran Canaria, Las Palmas de GranCanaria, Spain European Project: 637770,H2020,ERC-2014-STG,WAPITI(2015) 2020-02-22 https://hal-insu.archives-ouvertes.fr/insu-02521455 https://hal-insu.archives-ouvertes.fr/insu-02521455/document https://hal-insu.archives-ouvertes.fr/insu-02521455/file/2019JC015710%281%29.pdf https://doi.org/10.1029/2019JC015710 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2019JC015710 info:eu-repo/grantAgreement//637770/EU/Water-mass transformation and Pathways In The Weddell Sea: uncovering the dynamics of a global climate chokepoint from In-situ measurements/WAPITI insu-02521455 https://hal-insu.archives-ouvertes.fr/insu-02521455 https://hal-insu.archives-ouvertes.fr/insu-02521455/document https://hal-insu.archives-ouvertes.fr/insu-02521455/file/2019JC015710%281%29.pdf doi:10.1029/2019JC015710 WOS: 000530025600025 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal-insu.archives-ouvertes.fr/insu-02521455 Journal of Geophysical Research. Oceans, Wiley-Blackwell, 2020, 125 (2), pp.e2019JC015710. ⟨10.1029/2019JC015710⟩ [SDU]Sciences of the Universe [physics] [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/article Journal articles 2020 ftccsdartic https://doi.org/10.1029/2019JC015710 2021-12-19T01:25:16Z International audience We use new observations of stable water isotopes from a research cruise in early 2017 to highlight ocean-ice interactions occurring under Filchner-Ronne Ice Shelf, the largest Antarctic ice shelf. In particular, we investigate the properties of Ice Shelf Water with temperature lower than the surface freezing point, in the Filchner Depression. We identify two main flavors of Ice Shelf Water emerging from beneath the Filchner Ice Shelf, which originate from High Salinity Shelf Water end members with distinct characteristics. Furthermore, these two High Salinity Shelf Water end members interact with areas of the ice shelves with different basal properties to produce different versions of Ice Shelf Water. These water masses are associated with different rates of basal melting and refreezing, which we quantify. Ice Shelf Water types that flow out of the ice shelf cavity are composed of 0.4% of mass from ice shelf (melt minus freeze) when sampled at the front of Filchner Ice Shelf. The slightly lighter Ice Shelf Water version mixes directly with ambient water masses as it flows northward on the continental shelf. The resulting Ice Shelf Water mixture with temperature below the surface freezing point ultimately sinks along the continental slope into the deep ocean, as a precursor of the Weddell Sea bottom waters. Article in Journal/Newspaper Antarc* Antarctic Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ice Shelves Ronne Ice Shelf Weddell Sea Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Filchner Ice Shelf ENVELOPE(-40.000,-40.000,-79.000,-79.000) Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Weddell Weddell Sea Journal of Geophysical Research: Oceans 125 2