气候变化领域集成服务门户(CCPortal): Robust Enhancement of Tropical Convective Activity by the 2019 Antarctic Sudden Stratospheric Warming

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DOI	10.1029/2020GL088743
	Robust Enhancement of Tropical Convective Activity by the 2019 Antarctic Sudden Stratospheric Warming
	Noguchi S.; Kuroda Y.; Kodera K.; Watanabe S.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:15
英文摘要	Tropical tropospheric responses to a sudden stratospheric warming (SSW) event that occurred over Antarctica in September 2019 have been investigated by conducting a series of ensemble forecast experiments. Comparative examinations between the normal forecast and the partially nudged forecast, whose stratospheric circulation is constrained to a reanalysis, reveal a significant enhancement/suppression in the convective activity (upwelling/downwelling) over the northern/southern part of the tropics. Such an acceleration of the Hadley circulation is set up by thermal structural changes in the upper troposphere and lower stratosphere. The tropical cooling caused by the enhanced Brewer-Dobson circulation destabilizes the environment there and stimulates deep cumulus convections. In this case, the southern area of the Asian monsoon region is particularly sensitive. Although details of the triggered response depend on the adopted cumulus parameterization scheme, a boosting tendency of the convective upwelling via the SSW is robust. ©2020. The Authors.
英文关键词	Clouds; Forecasting; Troposphere; Brewer-Dobson circulation; Convective activity; Cumulus parameterization schemes; Enhancement/suppression; Stratospheric circulations; Sudden stratospheric warming; Tropical convective activity; Upwelling/downwelling; Tropics; atmospheric circulation; atmospheric convection; cooling; cumulus; ensemble forecasting; parameterization; stratosphere-troposphere interaction; sudden stratospheric warming; tropical region; Antarctica
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/170034
作者单位	Research Center for Environmental Modeling and Application, Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Yokohama, Japan; Meteorological Research Institute, Japan Meteorological Agency, Tsukuba, Japan; Meteorological College, Japan Meteorological Agency, Kashiwa, Japan
推荐引用方式 GB/T 7714	Noguchi S.,Kuroda Y.,Kodera K.,et al. Robust Enhancement of Tropical Convective Activity by the 2019 Antarctic Sudden Stratospheric Warming[J],2020,47(15).
APA	Noguchi S.,Kuroda Y.,Kodera K.,&Watanabe S..(2020).Robust Enhancement of Tropical Convective Activity by the 2019 Antarctic Sudden Stratospheric Warming.Geophysical Research Letters,47(15).
MLA	Noguchi S.,et al."Robust Enhancement of Tropical Convective Activity by the 2019 Antarctic Sudden Stratospheric Warming".Geophysical Research Letters 47.15(2020).