Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica
International audience The physical oceanographic environment, water mass characteristics, and distribution in the area adjacent to Larsen C Ice Shelf (LCIS) are investigated using hydrographic data collected during the 2019 Weddell Sea Expedition. The results shed light on the ocean conditions adja...
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-03017804 https://hal.science/hal-03017804/document https://hal.science/hal-03017804/file/2019JC015855.pdf https://doi.org/10.1029/2019jc015855 |
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ftceafr:oai:HAL:hal-03017804v1 |
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openpolar |
institution |
Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
op_collection_id |
ftceafr |
language |
English |
topic |
water mass mixing transformation Southern Ocean observations Weddell Sea [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
water mass mixing transformation Southern Ocean observations Weddell Sea [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Hutchinson, Katherine Deshayes, Julie Sallée, Jean-Baptiste Dowdeswell, Julian de Lavergne, Casimir Ansorge, Isabelle J. Luyt, Hermann Henry, Tahlia Fawcett, Sarah E. Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica |
topic_facet |
water mass mixing transformation Southern Ocean observations Weddell Sea [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience The physical oceanographic environment, water mass characteristics, and distribution in the area adjacent to Larsen C Ice Shelf (LCIS) are investigated using hydrographic data collected during the 2019 Weddell Sea Expedition. The results shed light on the ocean conditions adjacent to a thinning LCIS, on a continental shelf that is a source region for Weddell Sea Deep Water (WSDW), a precursor of the globally important Antarctic Bottom Water. Modified Warm Deep Water (MWDW), a water mass of circumpolar origin, is identified on the continental shelf and is observed to mix with Ice Shelf Water (ISW) and High Salinity Shelf Water (HSSW), both source waters of WSDW. A source water type decomposition analysis reveals high levels of mixing in the area, with much spatial variability. Heat content anomalies indicate an introduction of heat, presumed to be associated with MWDW, into the area via Jason Trough. Furthermore, candidate parent sources for ISW are identified in the region, indicating the potential for a flow of continental shelf waters into the ice shelf cavity; however, the impact on LCIS cannot be surmised from the available observations. ISW and HSSW are observed to make dominant contributions to the densest layers within Jason Trough, where waters are likely en route to feed the deep layers of the Antarctic Slope Current. This cross‐shelf flux of water masses links the region of the Weddell Sea adjacent to northern LCIS to global ocean circulation and Bottom Water characteristics via its contribution to ISW and HSSW, and hence WSDW properties. |
author2 |
Nucleus for European Modeling of the Ocean (NEMO R&D ) 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) Processus et interactions de fine échelle océanique (PROTEO) Scott Polar Research Institute Department of Oceanography Cape Town University of Cape Town European Union's Horizon 2020 research and innovation program (grant agreement 821926; IMMERSE project). European Project: 637770,H2020,ERC-2014-STG,WAPITI(2015) |
format |
Article in Journal/Newspaper |
author |
Hutchinson, Katherine Deshayes, Julie Sallée, Jean-Baptiste Dowdeswell, Julian de Lavergne, Casimir Ansorge, Isabelle J. Luyt, Hermann Henry, Tahlia Fawcett, Sarah E. |
author_facet |
Hutchinson, Katherine Deshayes, Julie Sallée, Jean-Baptiste Dowdeswell, Julian de Lavergne, Casimir Ansorge, Isabelle J. Luyt, Hermann Henry, Tahlia Fawcett, Sarah E. |
author_sort |
Hutchinson, Katherine |
title |
Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica |
title_short |
Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica |
title_full |
Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica |
title_fullStr |
Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica |
title_full_unstemmed |
Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica |
title_sort |
water mass characteristics and distribution adjacent to larsen c ice shelf, antarctica |
publisher |
HAL CCSD |
publishDate |
2020 |
url |
https://hal.science/hal-03017804 https://hal.science/hal-03017804/document https://hal.science/hal-03017804/file/2019JC015855.pdf https://doi.org/10.1029/2019jc015855 |
genre |
Antarc* Antarctic Antarctica Ice Shelf Southern Ocean Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf Southern Ocean Weddell Sea |
op_source |
ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-03017804 Journal of Geophysical Research. Oceans, 2020, 125 (4), ⟨10.1029/2019jc015855⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2019jc015855 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 hal-03017804 https://hal.science/hal-03017804 https://hal.science/hal-03017804/document https://hal.science/hal-03017804/file/2019JC015855.pdf doi:10.1029/2019jc015855 WOS: 000534476600008 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2019jc015855 |
container_title |
Journal of Geophysical Research: Oceans |
container_volume |
125 |
container_issue |
4 |
_version_ |
1799487041112637440 |
spelling |
ftceafr:oai:HAL:hal-03017804v1 2024-05-19T07:30:31+00:00 Water Mass Characteristics and Distribution Adjacent to Larsen C Ice Shelf, Antarctica Hutchinson, Katherine Deshayes, Julie Sallée, Jean-Baptiste Dowdeswell, Julian de Lavergne, Casimir Ansorge, Isabelle J. Luyt, Hermann Henry, Tahlia Fawcett, Sarah E. Nucleus for European Modeling of the Ocean (NEMO R&D ) 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) Processus et interactions de fine échelle océanique (PROTEO) Scott Polar Research Institute Department of Oceanography Cape Town University of Cape Town European Union's Horizon 2020 research and innovation program (grant agreement 821926; IMMERSE project). European Project: 637770,H2020,ERC-2014-STG,WAPITI(2015) 2020-04 https://hal.science/hal-03017804 https://hal.science/hal-03017804/document https://hal.science/hal-03017804/file/2019JC015855.pdf https://doi.org/10.1029/2019jc015855 en eng HAL CCSD Wiley-Blackwell info:eu-repo/semantics/altIdentifier/doi/10.1029/2019jc015855 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 hal-03017804 https://hal.science/hal-03017804 https://hal.science/hal-03017804/document https://hal.science/hal-03017804/file/2019JC015855.pdf doi:10.1029/2019jc015855 WOS: 000534476600008 info:eu-repo/semantics/OpenAccess ISSN: 2169-9275 EISSN: 2169-9291 Journal of Geophysical Research. Oceans https://hal.science/hal-03017804 Journal of Geophysical Research. Oceans, 2020, 125 (4), ⟨10.1029/2019jc015855⟩ water mass mixing transformation Southern Ocean observations Weddell Sea [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2020 ftceafr https://doi.org/10.1029/2019jc015855 2024-04-25T01:47:03Z International audience The physical oceanographic environment, water mass characteristics, and distribution in the area adjacent to Larsen C Ice Shelf (LCIS) are investigated using hydrographic data collected during the 2019 Weddell Sea Expedition. The results shed light on the ocean conditions adjacent to a thinning LCIS, on a continental shelf that is a source region for Weddell Sea Deep Water (WSDW), a precursor of the globally important Antarctic Bottom Water. Modified Warm Deep Water (MWDW), a water mass of circumpolar origin, is identified on the continental shelf and is observed to mix with Ice Shelf Water (ISW) and High Salinity Shelf Water (HSSW), both source waters of WSDW. A source water type decomposition analysis reveals high levels of mixing in the area, with much spatial variability. Heat content anomalies indicate an introduction of heat, presumed to be associated with MWDW, into the area via Jason Trough. Furthermore, candidate parent sources for ISW are identified in the region, indicating the potential for a flow of continental shelf waters into the ice shelf cavity; however, the impact on LCIS cannot be surmised from the available observations. ISW and HSSW are observed to make dominant contributions to the densest layers within Jason Trough, where waters are likely en route to feed the deep layers of the Antarctic Slope Current. This cross‐shelf flux of water masses links the region of the Weddell Sea adjacent to northern LCIS to global ocean circulation and Bottom Water characteristics via its contribution to ISW and HSSW, and hence WSDW properties. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Shelf Southern Ocean Weddell Sea HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Journal of Geophysical Research: Oceans 125 4 |