Impacts of Vertical Convective Mixing Schemes and Freshwater Forcing on the 2016–2017 Maud Rise Polynya Openings in a Regional Ocean Simulation
International audience Abstract The correct representation of the Maud Rise open‐ocean polynya in the Weddell Sea remains a challenge for ocean models. Here we reproduce the most recent polynya openings in 2016–2017 using a regional configuration, and assess their dependencies on vertical convective...
Published in: | Journal of Advances in Modeling Earth Systems |
---|---|
Main Authors: | , , , , , |
Other Authors: | , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2024
|
Subjects: | |
Online Access: | https://hal.science/hal-04614188 https://hal.science/hal-04614188/document https://hal.science/hal-04614188/file/J%20Adv%20Model%20Earth%20Syst%20-%202024%20-%20G%C3%BClk%20-%20Impacts%20of%20Vertical%20Convective%20Mixing%20Schemes%20and%20Freshwater%20Forcing%20on%20the%202016.pdf https://doi.org/10.1029/2023ms004106 |
id |
ftepunivpsaclay:oai:HAL:hal-04614188v1 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
École Polytechnique, Université Paris-Saclay: HAL |
op_collection_id |
ftepunivpsaclay |
language |
English |
topic |
[SDU]Sciences of the Universe [physics] |
spellingShingle |
[SDU]Sciences of the Universe [physics] Gülk, Birte Roquet, Fabien Naveira Garabato, Alberto Bourdallé-Badie, Romain Madec, Gurvan Giordani, Hervé Impacts of Vertical Convective Mixing Schemes and Freshwater Forcing on the 2016–2017 Maud Rise Polynya Openings in a Regional Ocean Simulation |
topic_facet |
[SDU]Sciences of the Universe [physics] |
description |
International audience Abstract The correct representation of the Maud Rise open‐ocean polynya in the Weddell Sea remains a challenge for ocean models. Here we reproduce the most recent polynya openings in 2016–2017 using a regional configuration, and assess their dependencies on vertical convective mixing schemes and freshwater forcing, both separately and in combination. We test three vertical convective mixing schemes: the enhanced vertical diffusion (EVD), the Eddy‐Diffusivity Mass‐Flux (EDMF) parameterization, and a modified version of EDMF accounting for thermobaric effects. Using simulations for the period 2007–2017, we find that the modified EDMF reproduces the observed climatological evolution of the mixed layer depth better than the original EDMF and the EVD, but a polynya fails to open due to excessive freshwater forcing. We thus use the modified EDMF to perform sensitivity experiments with reduced precipitation during 2012–2017. The imposed freshwater forcing strongly affects the number of years with polynyas. The simulation with the best representation of the 2016–2017 polynyas is analyzed to evaluate the triggering mechanisms. The 2016 polynya was induced by the action of thermobaric instabilities on a weak ambient stratification. This opening preconditioned the water column for 2017, which produced a stronger polynya. By examining the impacts of the different convective mixing schemes, we show that the modified EDMF generates more realistic patterns of deep convection. Our results highlight the importance of surface freshwater forcing and thermobaricity in governing deep convection around Maud Rise, and the need to represent thermobaric instabilities to realistically model Maud Rise polynyas. |
author2 |
Göteborgs Universitet = University of Gothenburg (GU) National Oceanography Centre (NOC) 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 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) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-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) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-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)) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Center for Neuroscience and Regenerative Medicine Bethesda (CNRM) Henry M. Jackson Foundation for the Advancement of Military Medicine (HJM) European Project: 821001,SO-CHIC(2019) |
format |
Article in Journal/Newspaper |
author |
Gülk, Birte Roquet, Fabien Naveira Garabato, Alberto Bourdallé-Badie, Romain Madec, Gurvan Giordani, Hervé |
author_facet |
Gülk, Birte Roquet, Fabien Naveira Garabato, Alberto Bourdallé-Badie, Romain Madec, Gurvan Giordani, Hervé |
author_sort |
Gülk, Birte |
title |
Impacts of Vertical Convective Mixing Schemes and Freshwater Forcing on the 2016–2017 Maud Rise Polynya Openings in a Regional Ocean Simulation |
title_short |
Impacts of Vertical Convective Mixing Schemes and Freshwater Forcing on the 2016–2017 Maud Rise Polynya Openings in a Regional Ocean Simulation |
title_full |
Impacts of Vertical Convective Mixing Schemes and Freshwater Forcing on the 2016–2017 Maud Rise Polynya Openings in a Regional Ocean Simulation |
title_fullStr |
Impacts of Vertical Convective Mixing Schemes and Freshwater Forcing on the 2016–2017 Maud Rise Polynya Openings in a Regional Ocean Simulation |
title_full_unstemmed |
Impacts of Vertical Convective Mixing Schemes and Freshwater Forcing on the 2016–2017 Maud Rise Polynya Openings in a Regional Ocean Simulation |
title_sort |
impacts of vertical convective mixing schemes and freshwater forcing on the 2016–2017 maud rise polynya openings in a regional ocean simulation |
publisher |
HAL CCSD |
publishDate |
2024 |
url |
https://hal.science/hal-04614188 https://hal.science/hal-04614188/document https://hal.science/hal-04614188/file/J%20Adv%20Model%20Earth%20Syst%20-%202024%20-%20G%C3%BClk%20-%20Impacts%20of%20Vertical%20Convective%20Mixing%20Schemes%20and%20Freshwater%20Forcing%20on%20the%202016.pdf https://doi.org/10.1029/2023ms004106 |
long_lat |
ENVELOPE(3.000,3.000,-66.000,-66.000) |
geographic |
Maud Rise Weddell Weddell Sea |
geographic_facet |
Maud Rise Weddell Weddell Sea |
genre |
Weddell Sea |
genre_facet |
Weddell Sea |
op_source |
ISSN: 1942-2466 Journal of Advances in Modeling Earth Systems https://hal.science/hal-04614188 Journal of Advances in Modeling Earth Systems, 2024, 16 (5), ⟨10.1029/2023ms004106⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2023ms004106 info:eu-repo/grantAgreement//821001/EU/Southern Ocean Carbon and Heat Impact on Climate/SO-CHIC hal-04614188 https://hal.science/hal-04614188 https://hal.science/hal-04614188/document https://hal.science/hal-04614188/file/J%20Adv%20Model%20Earth%20Syst%20-%202024%20-%20G%C3%BClk%20-%20Impacts%20of%20Vertical%20Convective%20Mixing%20Schemes%20and%20Freshwater%20Forcing%20on%20the%202016.pdf doi:10.1029/2023ms004106 WOS: 001223991600001 |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2023ms004106 |
container_title |
Journal of Advances in Modeling Earth Systems |
container_volume |
16 |
container_issue |
5 |
_version_ |
1812182030881914880 |
spelling |
ftepunivpsaclay:oai:HAL:hal-04614188v1 2024-10-06T13:53:20+00:00 Impacts of Vertical Convective Mixing Schemes and Freshwater Forcing on the 2016–2017 Maud Rise Polynya Openings in a Regional Ocean Simulation Gülk, Birte Roquet, Fabien Naveira Garabato, Alberto Bourdallé-Badie, Romain Madec, Gurvan Giordani, Hervé Göteborgs Universitet = University of Gothenburg (GU) National Oceanography Centre (NOC) 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 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) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-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) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-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)) Institut Polytechnique de Paris (IP Paris)-Institut Polytechnique de Paris (IP Paris)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité) Center for Neuroscience and Regenerative Medicine Bethesda (CNRM) Henry M. Jackson Foundation for the Advancement of Military Medicine (HJM) European Project: 821001,SO-CHIC(2019) 2024-05-16 https://hal.science/hal-04614188 https://hal.science/hal-04614188/document https://hal.science/hal-04614188/file/J%20Adv%20Model%20Earth%20Syst%20-%202024%20-%20G%C3%BClk%20-%20Impacts%20of%20Vertical%20Convective%20Mixing%20Schemes%20and%20Freshwater%20Forcing%20on%20the%202016.pdf https://doi.org/10.1029/2023ms004106 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2023ms004106 info:eu-repo/grantAgreement//821001/EU/Southern Ocean Carbon and Heat Impact on Climate/SO-CHIC hal-04614188 https://hal.science/hal-04614188 https://hal.science/hal-04614188/document https://hal.science/hal-04614188/file/J%20Adv%20Model%20Earth%20Syst%20-%202024%20-%20G%C3%BClk%20-%20Impacts%20of%20Vertical%20Convective%20Mixing%20Schemes%20and%20Freshwater%20Forcing%20on%20the%202016.pdf doi:10.1029/2023ms004106 WOS: 001223991600001 http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 1942-2466 Journal of Advances in Modeling Earth Systems https://hal.science/hal-04614188 Journal of Advances in Modeling Earth Systems, 2024, 16 (5), ⟨10.1029/2023ms004106⟩ [SDU]Sciences of the Universe [physics] info:eu-repo/semantics/article Journal articles 2024 ftepunivpsaclay https://doi.org/10.1029/2023ms004106 2024-09-12T23:50:32Z International audience Abstract The correct representation of the Maud Rise open‐ocean polynya in the Weddell Sea remains a challenge for ocean models. Here we reproduce the most recent polynya openings in 2016–2017 using a regional configuration, and assess their dependencies on vertical convective mixing schemes and freshwater forcing, both separately and in combination. We test three vertical convective mixing schemes: the enhanced vertical diffusion (EVD), the Eddy‐Diffusivity Mass‐Flux (EDMF) parameterization, and a modified version of EDMF accounting for thermobaric effects. Using simulations for the period 2007–2017, we find that the modified EDMF reproduces the observed climatological evolution of the mixed layer depth better than the original EDMF and the EVD, but a polynya fails to open due to excessive freshwater forcing. We thus use the modified EDMF to perform sensitivity experiments with reduced precipitation during 2012–2017. The imposed freshwater forcing strongly affects the number of years with polynyas. The simulation with the best representation of the 2016–2017 polynyas is analyzed to evaluate the triggering mechanisms. The 2016 polynya was induced by the action of thermobaric instabilities on a weak ambient stratification. This opening preconditioned the water column for 2017, which produced a stronger polynya. By examining the impacts of the different convective mixing schemes, we show that the modified EDMF generates more realistic patterns of deep convection. Our results highlight the importance of surface freshwater forcing and thermobaricity in governing deep convection around Maud Rise, and the need to represent thermobaric instabilities to realistically model Maud Rise polynyas. Article in Journal/Newspaper Weddell Sea École Polytechnique, Université Paris-Saclay: HAL Maud Rise ENVELOPE(3.000,3.000,-66.000,-66.000) Weddell Weddell Sea Journal of Advances in Modeling Earth Systems 16 5 |