Effects of ocean mesoscale eddies on atmosphere-sea ice-ocean interactions off Adélie Land, East Antarctica
International audience Heat and momentum exchanges at the Southern Ocean surface are crucial for the Earth's Climate, but the importance of the small-scale spatial variability of these surface fluxes is poorly understood. Here, we explore how small-scale heterogeneities of the surface condition...
Published in: | Climate Dynamics |
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ftunivnantes:oai:HAL:insu-03706402v1 2023-05-15T13:39:40+02:00 Effects of ocean mesoscale eddies on atmosphere-sea ice-ocean interactions off Adélie Land, East Antarctica Huot, P. -V. Kittel, C. Fichefet, T. Jourdain, N. C. Fettweis, X. 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)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) 2022 https://hal-insu.archives-ouvertes.fr/insu-03706402 https://hal-insu.archives-ouvertes.fr/insu-03706402/document https://hal-insu.archives-ouvertes.fr/insu-03706402/file/Huot2022_Article_EffectsOfOceanMesoscaleEddiesO.pdf https://doi.org/10.1007/s00382-021-06115-x en eng HAL CCSD Springer Verlag info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-021-06115-x insu-03706402 https://hal-insu.archives-ouvertes.fr/insu-03706402 https://hal-insu.archives-ouvertes.fr/insu-03706402/document https://hal-insu.archives-ouvertes.fr/insu-03706402/file/Huot2022_Article_EffectsOfOceanMesoscaleEddiesO.pdf BIBCODE: 2022ClDy.tmp.56H doi:10.1007/s00382-021-06115-x http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal-insu.archives-ouvertes.fr/insu-03706402 Climate Dynamics, 2022, ⟨10.1007/s00382-021-06115-x⟩ Southern Ocean Sea ice Mesoscale Atmosphere-sea ice-ocean interactions Regional Coupled Model [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2022 ftunivnantes https://doi.org/10.1007/s00382-021-06115-x 2023-03-01T01:36:31Z International audience Heat and momentum exchanges at the Southern Ocean surface are crucial for the Earth's Climate, but the importance of the small-scale spatial variability of these surface fluxes is poorly understood. Here, we explore how small-scale heterogeneities of the surface conditions due in particular to ocean eddies affect the atmosphere-sea ice-ocean interactions off Adélie Land, in East Antarctica. To this end, we use a high-resolution regional atmosphere-sea ice-ocean coupled model based on the NEMO-LIM and MAR models. We explore how the atmosphere responds to small-scale heterogeneity of the ocean or sea ice surface conditions, how eddies affect the sea ice and atmosphere, and how the eddy-driven surface fluxes impact the heat, freshwater, and momentum budget of the ocean. The atmosphere is found to be more sensitive to small-scale surface temperature gradients above the ice-covered than above the ice-free ocean. Sea ice concentration is found to be weaker above anticyclonic than cyclonic eddies due to increased sea ice melting or freezing (0.8 cm/day) partly compensated by sea ice convergence or divergence. The imprint of ice-free eddies on the atmosphere is weak, but in the presence of sea ice, air warming (+ 0.3 ∘C) and wind intensification (+ 0.1 m/s) are found above anticyclonic eddies, while cyclonic eddies have the opposite effects. Removing the interactions of eddies with the sea ice or atmosphere does not affect the total sea ice volume, but increases the ocean kinetic energy by 8% and weakens northward advection of sea ice, leading to a 15% decrease in freshwater flux north of 62.5 ∘ S and weaker ocean restratification. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Sea ice Southern Ocean Université de Nantes: HAL-UNIV-NANTES East Antarctica Southern Ocean Climate Dynamics 59 1-2 41 60 |
institution |
Open Polar |
collection |
Université de Nantes: HAL-UNIV-NANTES |
op_collection_id |
ftunivnantes |
language |
English |
topic |
Southern Ocean Sea ice Mesoscale Atmosphere-sea ice-ocean interactions Regional Coupled Model [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
Southern Ocean Sea ice Mesoscale Atmosphere-sea ice-ocean interactions Regional Coupled Model [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Huot, P. -V. Kittel, C. Fichefet, T. Jourdain, N. C. Fettweis, X. Effects of ocean mesoscale eddies on atmosphere-sea ice-ocean interactions off Adélie Land, East Antarctica |
topic_facet |
Southern Ocean Sea ice Mesoscale Atmosphere-sea ice-ocean interactions Regional Coupled Model [SDU]Sciences of the Universe [physics] [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Heat and momentum exchanges at the Southern Ocean surface are crucial for the Earth's Climate, but the importance of the small-scale spatial variability of these surface fluxes is poorly understood. Here, we explore how small-scale heterogeneities of the surface conditions due in particular to ocean eddies affect the atmosphere-sea ice-ocean interactions off Adélie Land, in East Antarctica. To this end, we use a high-resolution regional atmosphere-sea ice-ocean coupled model based on the NEMO-LIM and MAR models. We explore how the atmosphere responds to small-scale heterogeneity of the ocean or sea ice surface conditions, how eddies affect the sea ice and atmosphere, and how the eddy-driven surface fluxes impact the heat, freshwater, and momentum budget of the ocean. The atmosphere is found to be more sensitive to small-scale surface temperature gradients above the ice-covered than above the ice-free ocean. Sea ice concentration is found to be weaker above anticyclonic than cyclonic eddies due to increased sea ice melting or freezing (0.8 cm/day) partly compensated by sea ice convergence or divergence. The imprint of ice-free eddies on the atmosphere is weak, but in the presence of sea ice, air warming (+ 0.3 ∘C) and wind intensification (+ 0.1 m/s) are found above anticyclonic eddies, while cyclonic eddies have the opposite effects. Removing the interactions of eddies with the sea ice or atmosphere does not affect the total sea ice volume, but increases the ocean kinetic energy by 8% and weakens northward advection of sea ice, leading to a 15% decrease in freshwater flux north of 62.5 ∘ S and weaker ocean restratification. |
author2 |
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)-Université Grenoble Alpes (UGA)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP ) Université Grenoble Alpes (UGA) |
format |
Article in Journal/Newspaper |
author |
Huot, P. -V. Kittel, C. Fichefet, T. Jourdain, N. C. Fettweis, X. |
author_facet |
Huot, P. -V. Kittel, C. Fichefet, T. Jourdain, N. C. Fettweis, X. |
author_sort |
Huot, P. -V. |
title |
Effects of ocean mesoscale eddies on atmosphere-sea ice-ocean interactions off Adélie Land, East Antarctica |
title_short |
Effects of ocean mesoscale eddies on atmosphere-sea ice-ocean interactions off Adélie Land, East Antarctica |
title_full |
Effects of ocean mesoscale eddies on atmosphere-sea ice-ocean interactions off Adélie Land, East Antarctica |
title_fullStr |
Effects of ocean mesoscale eddies on atmosphere-sea ice-ocean interactions off Adélie Land, East Antarctica |
title_full_unstemmed |
Effects of ocean mesoscale eddies on atmosphere-sea ice-ocean interactions off Adélie Land, East Antarctica |
title_sort |
effects of ocean mesoscale eddies on atmosphere-sea ice-ocean interactions off adélie land, east antarctica |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal-insu.archives-ouvertes.fr/insu-03706402 https://hal-insu.archives-ouvertes.fr/insu-03706402/document https://hal-insu.archives-ouvertes.fr/insu-03706402/file/Huot2022_Article_EffectsOfOceanMesoscaleEddiesO.pdf https://doi.org/10.1007/s00382-021-06115-x |
geographic |
East Antarctica Southern Ocean |
geographic_facet |
East Antarctica Southern Ocean |
genre |
Antarc* Antarctica East Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctica East Antarctica Sea ice Southern Ocean |
op_source |
ISSN: 0930-7575 EISSN: 1432-0894 Climate Dynamics https://hal-insu.archives-ouvertes.fr/insu-03706402 Climate Dynamics, 2022, ⟨10.1007/s00382-021-06115-x⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1007/s00382-021-06115-x insu-03706402 https://hal-insu.archives-ouvertes.fr/insu-03706402 https://hal-insu.archives-ouvertes.fr/insu-03706402/document https://hal-insu.archives-ouvertes.fr/insu-03706402/file/Huot2022_Article_EffectsOfOceanMesoscaleEddiesO.pdf BIBCODE: 2022ClDy.tmp.56H doi:10.1007/s00382-021-06115-x |
op_rights |
http://creativecommons.org/licenses/by/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1007/s00382-021-06115-x |
container_title |
Climate Dynamics |
container_volume |
59 |
container_issue |
1-2 |
container_start_page |
41 |
op_container_end_page |
60 |
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1766122104734875648 |