Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events
Abstract The cold Eurasia has been proposed to be closely linked to the weakening of the stratospheric polar vortex (SPV), however, how the Arctic sea ice modulates the surface impacts of the weak SPV is unclear. This study explores the critical modulating role of reduced Arctic sea ice in the surfa...
Published in: | Geophysical Research Letters |
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Online Access: | https://doi.org/10.1029/2023GL107221 https://doaj.org/article/8f9ef402fe934ff8808d9d3ce890968e |
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ftdoajarticles:oai:doaj.org/article:8f9ef402fe934ff8808d9d3ce890968e 2024-09-15T18:34:18+00:00 Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events Chuntao Zou Ruonan Zhang 2024-02-01T00:00:00Z https://doi.org/10.1029/2023GL107221 https://doaj.org/article/8f9ef402fe934ff8808d9d3ce890968e EN eng Wiley https://doi.org/10.1029/2023GL107221 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL107221 https://doaj.org/article/8f9ef402fe934ff8808d9d3ce890968e Geophysical Research Letters, Vol 51, Iss 3, Pp n/a-n/a (2024) Geophysics. Cosmic physics QC801-809 article 2024 ftdoajarticles https://doi.org/10.1029/2023GL107221 2024-08-05T17:49:23Z Abstract The cold Eurasia has been proposed to be closely linked to the weakening of the stratospheric polar vortex (SPV), however, how the Arctic sea ice modulates the surface impacts of the weak SPV is unclear. This study explores the critical modulating role of reduced Arctic sea ice in the surface cooling response to SPV stretching events in autumn. Here, through ERA5 reanalysis and Whole Atmosphere Community Climate Model simulations, we show that Eurasian cold events are more likely (45%) to occur in days 30–50 after the onset of SPV stretching events under lower Barents‐Kara Seas (BKS) sea ice conditions, in contrast to under heavy BKS sea ice conditions when robust surface cooling is absent. The stratospheric and tropospheric pathways explain 46.8% and 53.2% of the total variance of Siberian coldness, respectively. The downward extension of anomalous stratospheric wave‐2 ridge to the troposphere intensifies the Arctic‐North European high, favoring the subsequent colder Siberia. Article in Journal/Newspaper Sea ice Siberia Directory of Open Access Journals: DOAJ Articles Geophysical Research Letters 51 3 |
institution |
Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geophysics. Cosmic physics QC801-809 |
spellingShingle |
Geophysics. Cosmic physics QC801-809 Chuntao Zou Ruonan Zhang Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events |
topic_facet |
Geophysics. Cosmic physics QC801-809 |
description |
Abstract The cold Eurasia has been proposed to be closely linked to the weakening of the stratospheric polar vortex (SPV), however, how the Arctic sea ice modulates the surface impacts of the weak SPV is unclear. This study explores the critical modulating role of reduced Arctic sea ice in the surface cooling response to SPV stretching events in autumn. Here, through ERA5 reanalysis and Whole Atmosphere Community Climate Model simulations, we show that Eurasian cold events are more likely (45%) to occur in days 30–50 after the onset of SPV stretching events under lower Barents‐Kara Seas (BKS) sea ice conditions, in contrast to under heavy BKS sea ice conditions when robust surface cooling is absent. The stratospheric and tropospheric pathways explain 46.8% and 53.2% of the total variance of Siberian coldness, respectively. The downward extension of anomalous stratospheric wave‐2 ridge to the troposphere intensifies the Arctic‐North European high, favoring the subsequent colder Siberia. |
format |
Article in Journal/Newspaper |
author |
Chuntao Zou Ruonan Zhang |
author_facet |
Chuntao Zou Ruonan Zhang |
author_sort |
Chuntao Zou |
title |
Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events |
title_short |
Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events |
title_full |
Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events |
title_fullStr |
Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events |
title_full_unstemmed |
Arctic Sea Ice Loss Modulates the Surface Impact of Autumn Stratospheric Polar Vortex Stretching Events |
title_sort |
arctic sea ice loss modulates the surface impact of autumn stratospheric polar vortex stretching events |
publisher |
Wiley |
publishDate |
2024 |
url |
https://doi.org/10.1029/2023GL107221 https://doaj.org/article/8f9ef402fe934ff8808d9d3ce890968e |
genre |
Sea ice Siberia |
genre_facet |
Sea ice Siberia |
op_source |
Geophysical Research Letters, Vol 51, Iss 3, Pp n/a-n/a (2024) |
op_relation |
https://doi.org/10.1029/2023GL107221 https://doaj.org/toc/0094-8276 https://doaj.org/toc/1944-8007 1944-8007 0094-8276 doi:10.1029/2023GL107221 https://doaj.org/article/8f9ef402fe934ff8808d9d3ce890968e |
op_doi |
https://doi.org/10.1029/2023GL107221 |
container_title |
Geophysical Research Letters |
container_volume |
51 |
container_issue |
3 |
_version_ |
1810476102087344128 |