Improving Antarctic Bottom Water precursors in NEMO for climate applications
International audience The world's largest ice shelves are found in the Antarctic Weddell Sea and Ross Sea where complex interactions between the atmosphere, sea ice, ice shelves and ocean transform shelf waters into High Salinity Shelf Water (HSSW) and Ice Shelf Water (ISW), the parent waters...
Published in: | Geoscientific Model Development |
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Main Authors: | , , , , , , , |
Other Authors: | , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2023
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Online Access: | https://insu.hal.science/insu-04188269 https://insu.hal.science/insu-04188269/document https://insu.hal.science/insu-04188269/file/gmd-16-3629-2023.pdf https://doi.org/10.5194/gmd-16-3629-2023 |
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ftunigrenoble:oai:HAL:insu-04188269v1 |
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Open Polar |
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Université Grenoble Alpes: HAL |
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English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Hutchinson, Katherine Deshayes, Julie Éthé, Christian rousset, clement de Lavergne, Casimir Vancoppenolle, M. Jourdain, Nicolas C. Mathiot, Pierre Improving Antarctic Bottom Water precursors in NEMO for climate applications |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience The world's largest ice shelves are found in the Antarctic Weddell Sea and Ross Sea where complex interactions between the atmosphere, sea ice, ice shelves and ocean transform shelf waters into High Salinity Shelf Water (HSSW) and Ice Shelf Water (ISW), the parent waters of Antarctic Bottom Water (AABW). This process feeds the lower limb of the global overturning circulation as AABW, the world's densest and deepest water mass, spreads outwards from Antarctica. None of the coupled climate models contributing to CMIP6 directly simulated ocean-ice shelf interactions, thereby omitting a potentially critical piece of the climate puzzle. As a first step towards better representing these processes in a global ocean model, we run a 1 ∘ resolution Nucleus for European Modelling of the Ocean (NEMO; eORCA1) forced configuration to explicitly simulate circulation beneath the Filchner-Ronne Ice Shelf (FRIS), Larsen C Ice Shelf (LCIS) and Ross Ice Shelf (RIS). These locations are thought to supply the majority of the source waters for AABW, and so melt in all other cavities is provisionally prescribed. Results show that the grid resolution of 1 ∘ is sufficient to produce melt rate patterns and total melt fluxes of FRIS (117 ± 21 Gt yr -1 ), LCIS (36 ± 7 Gt yr -1 ) and RIS (112 ± 22 Gt yr -1 ) that agree well with both high-resolution models and satellite measurements. Most notably, allowing sub-ice shelf circulation reduces salinity biases (0.1 psu), produces the previously unresolved water mass ISW and re-organizes the shelf circulation to bring the regional model hydrography closer to observations. A change in AABW within the Weddell Sea and the Ross Sea towards colder, fresher values is identified, but the magnitude is limited by the absence of a realistic overflow. This study presents a NEMO configuration that can be used for climate applications with improved realism of the Antarctic continental shelf circulation and a better representation of the precursors of AABW. |
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) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) the Grand Équipement National De Calcul Intensif (grant no. A0100107451) European Project: 820575,TiPACCs European Project: 898058 ,OPEN European Project: 101003536,ESM2025 |
format |
Article in Journal/Newspaper |
author |
Hutchinson, Katherine Deshayes, Julie Éthé, Christian rousset, clement de Lavergne, Casimir Vancoppenolle, M. Jourdain, Nicolas C. Mathiot, Pierre |
author_facet |
Hutchinson, Katherine Deshayes, Julie Éthé, Christian rousset, clement de Lavergne, Casimir Vancoppenolle, M. Jourdain, Nicolas C. Mathiot, Pierre |
author_sort |
Hutchinson, Katherine |
title |
Improving Antarctic Bottom Water precursors in NEMO for climate applications |
title_short |
Improving Antarctic Bottom Water precursors in NEMO for climate applications |
title_full |
Improving Antarctic Bottom Water precursors in NEMO for climate applications |
title_fullStr |
Improving Antarctic Bottom Water precursors in NEMO for climate applications |
title_full_unstemmed |
Improving Antarctic Bottom Water precursors in NEMO for climate applications |
title_sort |
improving antarctic bottom water precursors in nemo for climate applications |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://insu.hal.science/insu-04188269 https://insu.hal.science/insu-04188269/document https://insu.hal.science/insu-04188269/file/gmd-16-3629-2023.pdf https://doi.org/10.5194/gmd-16-3629-2023 |
long_lat |
ENVELOPE(-61.000,-61.000,-78.500,-78.500) |
geographic |
Antarctic The Antarctic Weddell Sea Ross Sea Ross Ice Shelf Weddell Ronne Ice Shelf |
geographic_facet |
Antarctic The Antarctic Weddell Sea Ross Sea Ross Ice Shelf Weddell Ronne Ice Shelf |
genre |
Antarc* Antarctic Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ice Shelves Ronne Ice Shelf Ross Ice Shelf Ross Sea Sea ice Weddell Sea |
genre_facet |
Antarc* Antarctic Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ice Shelves Ronne Ice Shelf Ross Ice Shelf Ross Sea Sea ice Weddell Sea |
op_source |
ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://insu.hal.science/insu-04188269 Geoscientific Model Development, 2023, 16, pp.3629-3650. ⟨10.5194/gmd-16-3629-2023⟩ https://gmd.copernicus.org/articles/16/3629/2023/ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-16-3629-2023 info:eu-repo/grantAgreement//820575/EU/Tipping Points in Antarctic Climate Components/TiPACCs info:eu-repo/grantAgreement//898058 /EU/Opening sub-ice shelf cavities and exploring their impact on dense water Production and Export in NEMO global ocean models/OPEN info:eu-repo/grantAgreement//101003536/EU/Earth system models for the future/ESM2025 insu-04188269 https://insu.hal.science/insu-04188269 https://insu.hal.science/insu-04188269/document https://insu.hal.science/insu-04188269/file/gmd-16-3629-2023.pdf BIBCODE: 2023GMD.16.3629H doi:10.5194/gmd-16-3629-2023 WOS: 001021653900001 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/gmd-16-3629-2023 |
container_title |
Geoscientific Model Development |
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12 |
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3629 |
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3650 |
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ftunigrenoble:oai:HAL:insu-04188269v1 2024-04-14T08:01:59+00:00 Improving Antarctic Bottom Water precursors in NEMO for climate applications Hutchinson, Katherine Deshayes, Julie Éthé, Christian rousset, clement de Lavergne, Casimir Vancoppenolle, M. Jourdain, Nicolas C. Mathiot, Pierre 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) Institut des Géosciences de l’Environnement (IGE) Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) the Grand Équipement National De Calcul Intensif (grant no. A0100107451) European Project: 820575,TiPACCs European Project: 898058 ,OPEN European Project: 101003536,ESM2025 2023 https://insu.hal.science/insu-04188269 https://insu.hal.science/insu-04188269/document https://insu.hal.science/insu-04188269/file/gmd-16-3629-2023.pdf https://doi.org/10.5194/gmd-16-3629-2023 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/gmd-16-3629-2023 info:eu-repo/grantAgreement//820575/EU/Tipping Points in Antarctic Climate Components/TiPACCs info:eu-repo/grantAgreement//898058 /EU/Opening sub-ice shelf cavities and exploring their impact on dense water Production and Export in NEMO global ocean models/OPEN info:eu-repo/grantAgreement//101003536/EU/Earth system models for the future/ESM2025 insu-04188269 https://insu.hal.science/insu-04188269 https://insu.hal.science/insu-04188269/document https://insu.hal.science/insu-04188269/file/gmd-16-3629-2023.pdf BIBCODE: 2023GMD.16.3629H doi:10.5194/gmd-16-3629-2023 WOS: 001021653900001 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1991-9603 EISSN: 1991-959X Geoscientific Model Development https://insu.hal.science/insu-04188269 Geoscientific Model Development, 2023, 16, pp.3629-3650. ⟨10.5194/gmd-16-3629-2023⟩ https://gmd.copernicus.org/articles/16/3629/2023/ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2023 ftunigrenoble https://doi.org/10.5194/gmd-16-3629-2023 2024-03-21T16:10:47Z International audience The world's largest ice shelves are found in the Antarctic Weddell Sea and Ross Sea where complex interactions between the atmosphere, sea ice, ice shelves and ocean transform shelf waters into High Salinity Shelf Water (HSSW) and Ice Shelf Water (ISW), the parent waters of Antarctic Bottom Water (AABW). This process feeds the lower limb of the global overturning circulation as AABW, the world's densest and deepest water mass, spreads outwards from Antarctica. None of the coupled climate models contributing to CMIP6 directly simulated ocean-ice shelf interactions, thereby omitting a potentially critical piece of the climate puzzle. As a first step towards better representing these processes in a global ocean model, we run a 1 ∘ resolution Nucleus for European Modelling of the Ocean (NEMO; eORCA1) forced configuration to explicitly simulate circulation beneath the Filchner-Ronne Ice Shelf (FRIS), Larsen C Ice Shelf (LCIS) and Ross Ice Shelf (RIS). These locations are thought to supply the majority of the source waters for AABW, and so melt in all other cavities is provisionally prescribed. Results show that the grid resolution of 1 ∘ is sufficient to produce melt rate patterns and total melt fluxes of FRIS (117 ± 21 Gt yr -1 ), LCIS (36 ± 7 Gt yr -1 ) and RIS (112 ± 22 Gt yr -1 ) that agree well with both high-resolution models and satellite measurements. Most notably, allowing sub-ice shelf circulation reduces salinity biases (0.1 psu), produces the previously unresolved water mass ISW and re-organizes the shelf circulation to bring the regional model hydrography closer to observations. A change in AABW within the Weddell Sea and the Ross Sea towards colder, fresher values is identified, but the magnitude is limited by the absence of a realistic overflow. This study presents a NEMO configuration that can be used for climate applications with improved realism of the Antarctic continental shelf circulation and a better representation of the precursors of AABW. Article in Journal/Newspaper Antarc* Antarctic Antarctica Filchner Ronne Ice Shelf Filchner-Ronne Ice Shelf Ice Shelf Ice Shelves Ronne Ice Shelf Ross Ice Shelf Ross Sea Sea ice Weddell Sea Université Grenoble Alpes: HAL Antarctic The Antarctic Weddell Sea Ross Sea Ross Ice Shelf Weddell Ronne Ice Shelf ENVELOPE(-61.000,-61.000,-78.500,-78.500) Geoscientific Model Development 16 12 3629 3650 |