The short-term response to a warming Arctic with a coupled model
International audience The Arctic region warms faster than the others regions of the globe which is known as the Arctic Amplification. The Arctic warming (AW) is expected to have impacts on the mid-latitudes Northern Hemisphere (NH) climate. It is essential to better understand theses teleconnection...
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2019
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Online Access: | https://hal.science/hal-02391985 |
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Open Polar |
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École Polytechnique, Université Paris-Saclay: HAL |
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ftepunivpsaclay |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] Simon, Amélie Gastineau, Guillaume Frankignoul, Claude The short-term response to a warming Arctic with a coupled model |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] |
description |
International audience The Arctic region warms faster than the others regions of the globe which is known as the Arctic Amplification. The Arctic warming (AW) is expected to have impacts on the mid-latitudes Northern Hemisphere (NH) climate. It is essential to better understand theses teleconnections to predict future climate. The AW teleconnections and the related ocean-atmosphere interactions are investigated with the coupled model IPSL-CM5A-LR. We compare three ensembles of 10 members each that only differ by the Arctic sea ice configuration: one ensemble uses present day control conditions and the other two used modified sea ice parameters to reproduce the Arctic sea ice extent corresponding to a warming of +1.5 °C. We constrain the Arctic sea ice by reducing the thermal conductivity or albedo of the sea ice in Northern Hemisphere only. For both method, reducing the Arctic sea ice leads to an Arctic Warming which propagates all over the globe, while no major tropical warming is found as a La Niña oriented response is simulated. A rapid weakening of the AMOC of about 0.7-0.8 Sv is seen for both methods. When we compare the results from the two methods, the albedo ensemble shows more intense surface heat flux anomaly in the Arctic sea ice region and a poleward shift of the mid-latitudes jets. The mechanisms behind the response of AW in these simulations will be investigated with the diagnostics of the energy and freshwater budget driven by the AW. |
author2 |
Océan et variabilité du climat (VARCLIM) 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) EGU |
format |
Conference Object |
author |
Simon, Amélie Gastineau, Guillaume Frankignoul, Claude |
author_facet |
Simon, Amélie Gastineau, Guillaume Frankignoul, Claude |
author_sort |
Simon, Amélie |
title |
The short-term response to a warming Arctic with a coupled model |
title_short |
The short-term response to a warming Arctic with a coupled model |
title_full |
The short-term response to a warming Arctic with a coupled model |
title_fullStr |
The short-term response to a warming Arctic with a coupled model |
title_full_unstemmed |
The short-term response to a warming Arctic with a coupled model |
title_sort |
short-term response to a warming arctic with a coupled model |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.science/hal-02391985 |
op_coverage |
Vienna, Austria |
genre |
albedo Arctic Sea ice |
genre_facet |
albedo Arctic Sea ice |
op_source |
21st EGU General Assembly https://hal.science/hal-02391985 21st EGU General Assembly, EGU, Apr 2019, Vienna, Austria |
op_relation |
hal-02391985 https://hal.science/hal-02391985 BIBCODE: 2019EGUGA.21.3184S |
_version_ |
1799468786224463872 |
spelling |
ftepunivpsaclay:oai:HAL:hal-02391985v1 2024-05-19T07:27:43+00:00 The short-term response to a warming Arctic with a coupled model Simon, Amélie Gastineau, Guillaume Frankignoul, Claude Océan et variabilité du climat (VARCLIM) 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) EGU Vienna, Austria 2019-04-12 https://hal.science/hal-02391985 en eng HAL CCSD hal-02391985 https://hal.science/hal-02391985 BIBCODE: 2019EGUGA.21.3184S 21st EGU General Assembly https://hal.science/hal-02391985 21st EGU General Assembly, EGU, Apr 2019, Vienna, Austria [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] info:eu-repo/semantics/conferenceObject Conference papers 2019 ftepunivpsaclay 2024-04-25T00:48:38Z International audience The Arctic region warms faster than the others regions of the globe which is known as the Arctic Amplification. The Arctic warming (AW) is expected to have impacts on the mid-latitudes Northern Hemisphere (NH) climate. It is essential to better understand theses teleconnections to predict future climate. The AW teleconnections and the related ocean-atmosphere interactions are investigated with the coupled model IPSL-CM5A-LR. We compare three ensembles of 10 members each that only differ by the Arctic sea ice configuration: one ensemble uses present day control conditions and the other two used modified sea ice parameters to reproduce the Arctic sea ice extent corresponding to a warming of +1.5 °C. We constrain the Arctic sea ice by reducing the thermal conductivity or albedo of the sea ice in Northern Hemisphere only. For both method, reducing the Arctic sea ice leads to an Arctic Warming which propagates all over the globe, while no major tropical warming is found as a La Niña oriented response is simulated. A rapid weakening of the AMOC of about 0.7-0.8 Sv is seen for both methods. When we compare the results from the two methods, the albedo ensemble shows more intense surface heat flux anomaly in the Arctic sea ice region and a poleward shift of the mid-latitudes jets. The mechanisms behind the response of AW in these simulations will be investigated with the diagnostics of the energy and freshwater budget driven by the AW. Conference Object albedo Arctic Sea ice École Polytechnique, Université Paris-Saclay: HAL |