气候变化领域集成服务门户(CCPortal): Tropospheric Forcing of the 2019 Antarctic Sudden Stratospheric Warming

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DOI	10.1029/2020GL089343
	Tropospheric Forcing of the 2019 Antarctic Sudden Stratospheric Warming
	Shen X.; Wang L.; Osprey S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	The strongest and most persistent upward propagation of zonal wavenumber 1 (WN1) Rossby waves from the troposphere on record led to the rare Antarctic sudden stratospheric warming (SSW) in September 2019. The dynamical contribution from instantaneous anomalous WN1 and its linear interference with the climatological WN1 contributed equally to the event. The unprecedented WN1 planetary wave behavior is further attributed to a long-lived midlatitude circumpolar Rossby wave train in the troposphere that was sustained by anomalous convection, first over the subtropical Pacific Ocean east of Australia and then over the eastern South Pacific. Besides the tropospheric wave forcing, the phase of the quasi-biennial oscillation in the upper stratosphere also facilitated the weakening of polar vortex. Moreover, this SSW strongly influenced the tropospheric circulation via the Southern annular mode, favoring conditions linked to the 2019 bushfires in eastern Australia. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Mechanical waves; Ocean currents; Eastern Australia; Eastern South-Pacific; Linear interference; Quasi-biennial oscillation; Southern Annular Mode; Sudden stratospheric warming; Tropospheric circulation; Tropospheric waves; Troposphere; climate forcing; global warming; midlatitude environment; planetary wave; quasi-biennial oscillation; Rossby wave; stratosphere; troposphere; wave propagation; zonal wind; Australia; Pacific Coast [Australia]; Pacific Ocean; Pacific Ocean (South); Pacific Ocean (Subtropical)
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169565
作者单位	Center for Monsoon System Research, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China; Atmospheric, Oceanic and Planetary Physics, University of Oxford, Oxford, United Kingdom; National Centre for Atmospheric Science, University of Oxford, Oxford, United Kingdom
推荐引用方式 GB/T 7714	Shen X.,Wang L.,Osprey S.. Tropospheric Forcing of the 2019 Antarctic Sudden Stratospheric Warming[J],2020,47(20).
APA	Shen X.,Wang L.,&Osprey S..(2020).Tropospheric Forcing of the 2019 Antarctic Sudden Stratospheric Warming.Geophysical Research Letters,47(20).
MLA	Shen X.,et al."Tropospheric Forcing of the 2019 Antarctic Sudden Stratospheric Warming".Geophysical Research Letters 47.20(2020).