The Role of Mid-latitude Westerly Jet in the Impacts of November Ural Blocking on Early-Winter Warmer Arctic-Colder Eurasia Pattern
Based on statistical analysis using observations and idealized model simulations, previous studies have revealed the potential response of early-winter atmospheric circulation and temperature anomalies to November Ural blocking (UB) anomalies. Using a large number of coupled simulations, this study...
Published in: | Geophysical Research Letters |
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American Geophysical Union
2022
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Online Access: | https://hdl.handle.net/11250/3023671 https://doi.org/10.1029/2022GL099096 |
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ftunivbergen:oai:bora.uib.no:11250/3023671 2023-05-15T14:56:21+02:00 The Role of Mid-latitude Westerly Jet in the Impacts of November Ural Blocking on Early-Winter Warmer Arctic-Colder Eurasia Pattern Xu, Xinping He, Shengping Zhou, Botao Wang, Huijun Outten, Stephen 2022 application/pdf https://hdl.handle.net/11250/3023671 https://doi.org/10.1029/2022GL099096 eng eng American Geophysical Union urn:issn:0094-8276 https://hdl.handle.net/11250/3023671 https://doi.org/10.1029/2022GL099096 cristin:2057077 Geophysical Research Letters. 2022, 49 (16), e2022GL099096. Navngivelse-IkkeKommersiell-Ingen bearbeidelser 4.0 Internasjonal https://creativecommons.org/licenses/by-nc-nd/4.0/deed.no Copyright 2022 the authors e2022GL099096 Geophysical Research Letters 49 16 Journal article Peer reviewed 2022 ftunivbergen https://doi.org/10.1029/2022GL099096 2023-03-14T17:44:55Z Based on statistical analysis using observations and idealized model simulations, previous studies have revealed the potential response of early-winter atmospheric circulation and temperature anomalies to November Ural blocking (UB) anomalies. Using a large number of coupled simulations, this study found that the response is sensitive to the intensity of November mid-latitude westerly jet over Eurasia. Stronger-than-normal November UB without a significantly weakened westerly jet could not cause significant atmospheric response in early-winter. By contrast, stronger-than-normal November UB with a significantly weakened jet would be followed by a warmer Arctic-colder Eurasia (WACE) pattern in December. The significantly weakened westerly jet favors stronger upward propagation of planetary waves, which causes stronger weakening and longer persistence of the stratospheric polar vortex. This stratospheric response persists into December and propagates downward into the troposphere interfering with planetary waves (especially wavenumber-1). The lead-lag UB-WACE linkage modulated by mid-latitude jet may have implications for sub-seasonal predictability. publishedVersion Article in Journal/Newspaper Arctic University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Geophysical Research Letters 49 16 |
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Open Polar |
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University of Bergen: Bergen Open Research Archive (BORA-UiB) |
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ftunivbergen |
language |
English |
description |
Based on statistical analysis using observations and idealized model simulations, previous studies have revealed the potential response of early-winter atmospheric circulation and temperature anomalies to November Ural blocking (UB) anomalies. Using a large number of coupled simulations, this study found that the response is sensitive to the intensity of November mid-latitude westerly jet over Eurasia. Stronger-than-normal November UB without a significantly weakened westerly jet could not cause significant atmospheric response in early-winter. By contrast, stronger-than-normal November UB with a significantly weakened jet would be followed by a warmer Arctic-colder Eurasia (WACE) pattern in December. The significantly weakened westerly jet favors stronger upward propagation of planetary waves, which causes stronger weakening and longer persistence of the stratospheric polar vortex. This stratospheric response persists into December and propagates downward into the troposphere interfering with planetary waves (especially wavenumber-1). The lead-lag UB-WACE linkage modulated by mid-latitude jet may have implications for sub-seasonal predictability. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Xu, Xinping He, Shengping Zhou, Botao Wang, Huijun Outten, Stephen |
spellingShingle |
Xu, Xinping He, Shengping Zhou, Botao Wang, Huijun Outten, Stephen The Role of Mid-latitude Westerly Jet in the Impacts of November Ural Blocking on Early-Winter Warmer Arctic-Colder Eurasia Pattern |
author_facet |
Xu, Xinping He, Shengping Zhou, Botao Wang, Huijun Outten, Stephen |
author_sort |
Xu, Xinping |
title |
The Role of Mid-latitude Westerly Jet in the Impacts of November Ural Blocking on Early-Winter Warmer Arctic-Colder Eurasia Pattern |
title_short |
The Role of Mid-latitude Westerly Jet in the Impacts of November Ural Blocking on Early-Winter Warmer Arctic-Colder Eurasia Pattern |
title_full |
The Role of Mid-latitude Westerly Jet in the Impacts of November Ural Blocking on Early-Winter Warmer Arctic-Colder Eurasia Pattern |
title_fullStr |
The Role of Mid-latitude Westerly Jet in the Impacts of November Ural Blocking on Early-Winter Warmer Arctic-Colder Eurasia Pattern |
title_full_unstemmed |
The Role of Mid-latitude Westerly Jet in the Impacts of November Ural Blocking on Early-Winter Warmer Arctic-Colder Eurasia Pattern |
title_sort |
role of mid-latitude westerly jet in the impacts of november ural blocking on early-winter warmer arctic-colder eurasia pattern |
publisher |
American Geophysical Union |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3023671 https://doi.org/10.1029/2022GL099096 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_source |
e2022GL099096 Geophysical Research Letters 49 16 |
op_relation |
urn:issn:0094-8276 https://hdl.handle.net/11250/3023671 https://doi.org/10.1029/2022GL099096 cristin:2057077 Geophysical Research Letters. 2022, 49 (16), e2022GL099096. |
op_rights |
Navngivelse-IkkeKommersiell-Ingen bearbeidelser 4.0 Internasjonal https://creativecommons.org/licenses/by-nc-nd/4.0/deed.no Copyright 2022 the authors |
op_doi |
https://doi.org/10.1029/2022GL099096 |
container_title |
Geophysical Research Letters |
container_volume |
49 |
container_issue |
16 |
_version_ |
1766328384951943168 |