دورية أكاديمية
Important role of stratosphere-troposphere coupling in the Arctic mid-to-upper tropospheric warming in response to sea-ice loss
| العنوان: | Important role of stratosphere-troposphere coupling in the Arctic mid-to-upper tropospheric warming in response to sea-ice loss |
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| المؤلفون: | Mian Xu, Wenshou Tian, Jiankai Zhang, James A. Screen, Chongyang Zhang, Zhe Wang |
| المصدر: | npj Climate and Atmospheric Science, Vol 6, Iss 1, Pp 1-9 (2023) |
| بيانات النشر: | Nature Portfolio, 2023. |
| سنة النشر: | 2023 |
| المجموعة: | LCC:Environmental sciences LCC:Meteorology. Climatology |
| مصطلحات موضوعية: | Environmental sciences, GE1-350, Meteorology. Climatology, QC851-999 |
| الوصف: | Abstract Recent studies have suggested that deep Arctic warming, extending from the surface to the upper troposphere, could trigger mid-latitude atmospheric circulation changes, while shallow Arctic warming, confined in the lowermost troposphere, induces comparatively weak remote responses. The causes of Arctic mid-to-upper tropospheric warming are less clear compared with near-surface warming. Here, we demonstrate a new dynamical mechanism responsible for the polar mid-to-upper tropospheric warming associated with Arctic sea-ice loss, using both reanalysis and model simulations. The Barents-Kara sea-ice loss enhances the upward propagating waves, leading to the wave convergence anomalies in the sub-polar lower stratosphere and upper troposphere. The consequent eddy feedback leads to clockwise residual overturning anomalies in the sub-polar upper and middle troposphere, accompanied by anomalous descent and consequent adiabatic warming in the Arctic mid-to-upper troposphere. The essential role of stratosphere-troposphere coupling for deep Arctic warming induced by sea-ice loss is confirmed by model simulations with stratospheric variability suppressed, in which only the Arctic lower troposphere is warmed in response to sea-ice loss. Our results suggest that a considerable part of the observed Arctic mid-to-upper warming is caused by a dynamical response to sea-ice loss, in which stratosphere-troposphere coupling plays a major role. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2397-3722 |
| Relation: | https://doaj.org/toc/2397-3722 |
| DOI: | 10.1038/s41612-023-00333-2 |
| URL الوصول: | https://doaj.org/article/77a29d1f60144e3eb93caf321abcbe9e |
| رقم الأكسشن: | edsdoj.77a29d1f60144e3eb93caf321abcbe9e |
| قاعدة البيانات: | Directory of Open Access Journals |
Find this article in full text from Springer Verlag. 
Full Text Finder | تدمد: | 23973722 |
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| DOI: | 10.1038/s41612-023-00333-2 |