Near-term and Large-scale Coupled Climate System Responses to Arctic Sea-ice Loss
Rapid changes in the Arctic have been observed and are expected to be amplified in future. However, the influence of Arctic sea-ice decline on global climate remains under debate. We focus on a modeling analysis of the ocean-atmosphere responses to a near-term Arctic sea-ice loss (corresponding to t...
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ftzenodo:oai:zenodo.org:3706584 2024-09-15T17:35:48+00:00 Near-term and Large-scale Coupled Climate System Responses to Arctic Sea-ice Loss Simon Amelie Guillaume Gastineau Claude Frankignoul Francis Codron 2020-02-19 https://doi.org/10.5281/zenodo.3706584 unknown Zenodo https://zenodo.org/communities/eu https://doi.org/10.5281/zenodo.3706583 https://doi.org/10.5281/zenodo.3706584 oai:zenodo.org:3706584 info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode info:eu-repo/semantics/lecture 2020 ftzenodo https://doi.org/10.5281/zenodo.370658410.5281/zenodo.3706583 2024-07-25T20:28:34Z Rapid changes in the Arctic have been observed and are expected to be amplified in future. However, the influence of Arctic sea-ice decline on global climate remains under debate. We focus on a modeling analysis of the ocean-atmosphere responses to a near-term Arctic sea-ice loss (corresponding to the period 2035-2055 under the RCP8.5 scenario). With the coupled model IPSL-CM5A2, two different methods to melt Arctic sea-ice are implemented to estimate the robustness of the protocol. We will show that modifying the albedo or changing the thermal conductivity of the Arctic sea-ice show similar pattern responses but with different magnitude. It is also found that, at the 10% significance level, Arctic sea-ice decline leads to large-scale circulation responses such as a negative North Atlantic Oscillation (NAO) associated with southward shift of the westerlies; an expansion north of the North Atlantic current; a weaker Atlantic Meridional Overturning Circulation (AMOC) linked to a shallower mix layer depth at subpolar North Atlantic deep-convection site; a southward shift of the Intertropical Convergence Zone (ITCZ); a tropical Pacific cooling and a positive Southern Annular Mode (SAM). Lecture albedo north atlantic current North Atlantic North Atlantic oscillation Sea ice Zenodo |
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Rapid changes in the Arctic have been observed and are expected to be amplified in future. However, the influence of Arctic sea-ice decline on global climate remains under debate. We focus on a modeling analysis of the ocean-atmosphere responses to a near-term Arctic sea-ice loss (corresponding to the period 2035-2055 under the RCP8.5 scenario). With the coupled model IPSL-CM5A2, two different methods to melt Arctic sea-ice are implemented to estimate the robustness of the protocol. We will show that modifying the albedo or changing the thermal conductivity of the Arctic sea-ice show similar pattern responses but with different magnitude. It is also found that, at the 10% significance level, Arctic sea-ice decline leads to large-scale circulation responses such as a negative North Atlantic Oscillation (NAO) associated with southward shift of the westerlies; an expansion north of the North Atlantic current; a weaker Atlantic Meridional Overturning Circulation (AMOC) linked to a shallower mix layer depth at subpolar North Atlantic deep-convection site; a southward shift of the Intertropical Convergence Zone (ITCZ); a tropical Pacific cooling and a positive Southern Annular Mode (SAM). |
format |
Lecture |
author |
Simon Amelie Guillaume Gastineau Claude Frankignoul Francis Codron |
spellingShingle |
Simon Amelie Guillaume Gastineau Claude Frankignoul Francis Codron Near-term and Large-scale Coupled Climate System Responses to Arctic Sea-ice Loss |
author_facet |
Simon Amelie Guillaume Gastineau Claude Frankignoul Francis Codron |
author_sort |
Simon Amelie |
title |
Near-term and Large-scale Coupled Climate System Responses to Arctic Sea-ice Loss |
title_short |
Near-term and Large-scale Coupled Climate System Responses to Arctic Sea-ice Loss |
title_full |
Near-term and Large-scale Coupled Climate System Responses to Arctic Sea-ice Loss |
title_fullStr |
Near-term and Large-scale Coupled Climate System Responses to Arctic Sea-ice Loss |
title_full_unstemmed |
Near-term and Large-scale Coupled Climate System Responses to Arctic Sea-ice Loss |
title_sort |
near-term and large-scale coupled climate system responses to arctic sea-ice loss |
publisher |
Zenodo |
publishDate |
2020 |
url |
https://doi.org/10.5281/zenodo.3706584 |
genre |
albedo north atlantic current North Atlantic North Atlantic oscillation Sea ice |
genre_facet |
albedo north atlantic current North Atlantic North Atlantic oscillation Sea ice |
op_relation |
https://zenodo.org/communities/eu https://doi.org/10.5281/zenodo.3706583 https://doi.org/10.5281/zenodo.3706584 oai:zenodo.org:3706584 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/legalcode |
op_doi |
https://doi.org/10.5281/zenodo.370658410.5281/zenodo.3706583 |
_version_ |
1810479834020708352 |