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	Possible influence of Asian polar vertex contraction on rainfall deficits in China in autumn
	Zhu, Xian1,3; Wei, Zhigang1,3; Dong, Wenjie2,3; Li, Zhenchao4; Zheng, Zhiyuan2; Chen, Chen1; Chen, Guangyu1; Liu, Yajing1
刊名	DYNAMICS OF ATMOSPHERES AND OCEANS
	2018-06-01
卷号	82页码:64-75
关键词	Asian polar vertex contraction Rainfall deficit Autumn China
ISSN号	0377-0265
DOI	10.1016/j.dynatmoce.2018.04.001
通讯作者	Wei, Zhigang(wzg@bnu.edu.cn)
英文摘要	The mechanisms governing variations in autumn precipitation are complicated and influenced by a number factors. This paper analyses the characteristics of autumn precipitation in China and investigates the influence of Asian polar vertex contraction on rainfall deficits in China and relevant mechanisms. Autumn precipitation decreased significantly from 1961 to 2012 in mid- and southern China, and the area of the Asia polar vortex (AAV) has decreased significantly since 1988. Asian polar vertex contraction is found to be an important factor in these autumn rainfall deficits in China through the following mechanism. Asian polar vertex contraction causes anomalously high geopotential heights in East Asia (from 25 N to 55 N) and low heights north of 65 N in the upper and lower troposphere, weakening meridional gradients in geopotential height. In the upper troposphere, the westerly and northerly winds are strengthened over high latitudes and westerly winds and the subtropical westerly jet are weakened over the East Asian mid latitudes. In the lower troposphere, westerly winds are strengthened over high latitudes, westerly winds are weakened in East Asia and along the southern periphery of the Tibetan Plateau, and northerly winds in mid- and southern China are clearly strengthened. Hence, autumn rainfall decreases in mid- and southern China.
收录类别	SCI
WOS关键词	SEA-SURFACE TEMPERATURE ; TIBETAN PLATEAU ; NORTHERN-HEMISPHERE ; CIRCUMPOLAR VORTEX ; SUMMER MONSOON ; CLIMATE-CHANGE ; WESTERLY JET ; PRECIPITATION ; VARIABILITY ; IMPACTS
WOS研究方向	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences ; Oceanography
WOS类目	Geochemistry & Geophysics ; Meteorology & Atmospheric Sciences ; Oceanography
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000435624800005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557801
专题	寒区旱区环境与工程研究所
通讯作者	Wei, Zhigang
作者单位	1.Beijing Normal Univ, Fac Geog Sci, State Key Lab Earth Surface Proc & Resource Ecol, Beijing 100875, Peoples R China 2.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou 510275, Guangdong, Peoples R China 3.Beijing Normal Univ, Future Earth Res Inst, Zhuhai Joint Innovat Ctr Climate Environm Ecosyst, Zhuhai 519087, Peoples R China 4.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Zhu, Xian,Wei, Zhigang,Dong, Wenjie,et al. Possible influence of Asian polar vertex contraction on rainfall deficits in China in autumn[J]. DYNAMICS OF ATMOSPHERES AND OCEANS,2018,82:64-75.
APA	Zhu, Xian.,Wei, Zhigang.,Dong, Wenjie.,Li, Zhenchao.,Zheng, Zhiyuan.,...&Liu, Yajing.(2018).Possible influence of Asian polar vertex contraction on rainfall deficits in China in autumn.DYNAMICS OF ATMOSPHERES AND OCEANS,82,64-75.
MLA	Zhu, Xian,et al."Possible influence of Asian polar vertex contraction on rainfall deficits in China in autumn".DYNAMICS OF ATMOSPHERES AND OCEANS 82(2018):64-75.

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