Influence of the recent winter Arctic sea ice loss in short-term simulations of a regional atmospheric model
Abstract Notable changes in the wintertime Arctic atmospheric circulation have occurred over the last few decades. Despite its importance in understanding the recent changes in the Northern Hemisphere midlatitude climate, it remains unclear whether and how these changes are affected by recent Arctic...
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ftdoajarticles:oai:doaj.org/article:09e8734beaae4bc68d3036a62075e583 2023-05-15T14:49:22+02:00 Influence of the recent winter Arctic sea ice loss in short-term simulations of a regional atmospheric model Heeje Cho Jong-Seong Kug Sang-Yoon Jun 2022-05-01T00:00:00Z https://doi.org/10.1038/s41598-022-12783-4 https://doaj.org/article/09e8734beaae4bc68d3036a62075e583 EN eng Nature Portfolio https://doi.org/10.1038/s41598-022-12783-4 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-12783-4 2045-2322 https://doaj.org/article/09e8734beaae4bc68d3036a62075e583 Scientific Reports, Vol 12, Iss 1, Pp 1-8 (2022) Medicine R Science Q article 2022 ftdoajarticles https://doi.org/10.1038/s41598-022-12783-4 2022-12-31T03:02:37Z Abstract Notable changes in the wintertime Arctic atmospheric circulation have occurred over the last few decades. Despite its importance in understanding the recent changes in the Northern Hemisphere midlatitude climate, it remains unclear whether and how these changes are affected by recent Arctic sea ice loss. In this study, a regional scale model is used to separate the direct sea ice influence from the natural variability of large-scale atmospheric circulation. Results show that, in response to sea ice loss, the increase of geopotential height in the mid-to-upper troposphere is robust across the simulations, but the magnitude of the response is highly dependent on the background state of the atmosphere. In most cases the sea ice loss-induced atmospheric warming is trapped near the surface due to the high vertical stability of winter Arctic lower troposphere, accordingly, resulting in a small response of geopotential height. However, when a low-pressure system is located over the Barents Sea, the relatively weak stability allows an upward transport of the surface warming, causing a significantly larger geopotential height increase. This strong state-dependence of atmospheric response which is also found in recent studies using global-scale model experiments, highlights the importance of accurately representing the atmospheric background state for numerical model assessments of sea ice influence. Article in Journal/Newspaper Arctic Barents Sea Sea ice Directory of Open Access Journals: DOAJ Articles Arctic Barents Sea Scientific Reports 12 1 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Medicine R Science Q |
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Medicine R Science Q Heeje Cho Jong-Seong Kug Sang-Yoon Jun Influence of the recent winter Arctic sea ice loss in short-term simulations of a regional atmospheric model |
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Medicine R Science Q |
description |
Abstract Notable changes in the wintertime Arctic atmospheric circulation have occurred over the last few decades. Despite its importance in understanding the recent changes in the Northern Hemisphere midlatitude climate, it remains unclear whether and how these changes are affected by recent Arctic sea ice loss. In this study, a regional scale model is used to separate the direct sea ice influence from the natural variability of large-scale atmospheric circulation. Results show that, in response to sea ice loss, the increase of geopotential height in the mid-to-upper troposphere is robust across the simulations, but the magnitude of the response is highly dependent on the background state of the atmosphere. In most cases the sea ice loss-induced atmospheric warming is trapped near the surface due to the high vertical stability of winter Arctic lower troposphere, accordingly, resulting in a small response of geopotential height. However, when a low-pressure system is located over the Barents Sea, the relatively weak stability allows an upward transport of the surface warming, causing a significantly larger geopotential height increase. This strong state-dependence of atmospheric response which is also found in recent studies using global-scale model experiments, highlights the importance of accurately representing the atmospheric background state for numerical model assessments of sea ice influence. |
format |
Article in Journal/Newspaper |
author |
Heeje Cho Jong-Seong Kug Sang-Yoon Jun |
author_facet |
Heeje Cho Jong-Seong Kug Sang-Yoon Jun |
author_sort |
Heeje Cho |
title |
Influence of the recent winter Arctic sea ice loss in short-term simulations of a regional atmospheric model |
title_short |
Influence of the recent winter Arctic sea ice loss in short-term simulations of a regional atmospheric model |
title_full |
Influence of the recent winter Arctic sea ice loss in short-term simulations of a regional atmospheric model |
title_fullStr |
Influence of the recent winter Arctic sea ice loss in short-term simulations of a regional atmospheric model |
title_full_unstemmed |
Influence of the recent winter Arctic sea ice loss in short-term simulations of a regional atmospheric model |
title_sort |
influence of the recent winter arctic sea ice loss in short-term simulations of a regional atmospheric model |
publisher |
Nature Portfolio |
publishDate |
2022 |
url |
https://doi.org/10.1038/s41598-022-12783-4 https://doaj.org/article/09e8734beaae4bc68d3036a62075e583 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea Sea ice |
genre_facet |
Arctic Barents Sea Sea ice |
op_source |
Scientific Reports, Vol 12, Iss 1, Pp 1-8 (2022) |
op_relation |
https://doi.org/10.1038/s41598-022-12783-4 https://doaj.org/toc/2045-2322 doi:10.1038/s41598-022-12783-4 2045-2322 https://doaj.org/article/09e8734beaae4bc68d3036a62075e583 |
op_doi |
https://doi.org/10.1038/s41598-022-12783-4 |
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Scientific Reports |
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12 |
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1 |
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1766320430630567936 |