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	Why is there an early spring cooling shift downstream of the tibetan plateau?
	Li, J; Yu, RC; Zhou, TJ; Wang, B
刊名	Journal of climate
	2005-11-01
卷号	18期号:22页码:4660-4668
ISSN号	0894-8755
通讯作者	Yu, rc()
英文摘要	The temperature shift over the eastern flank of the tibetan plateau is examined using the last 50 yr of chinese surface station observations. it was found that a strong cooling shift occurs in early spring ( march and april) and late summer ( july, august, and september) in contrast to the warming shift in other seasons. the cause of the march-april ( ma) cooling is investigated in this study. the ma cooling shift on the lee side of the tibetan plateau is found to be not a local phenomenon, but rather it is associated with an eastward extension of a cooling signal originating from north africa that is related to the north atlantic oscillation ( nao) in the previous winter. the midtropospheric westerlies over the north atlantic and north africa tend to intensify during positive nao phases. the enhanced westerlies, after passing over the tibetan plateau, result in strengthened ascending motion against the lee side of the plateau, which favors the formation of midlevel stratiform clouds. the increased amount of stratus clouds induces a negative net cloud - radiative forcing, which thereby cools the surface air and triggers a positive cloud - temperature feedback. in this way, the cooling signal from the upstream could "jump" over the tibetan plateau and leave a footprint on its lee side. the continental stratiform cloud - climate feedback plays a significant role in the amplification of the cooling shift downstream of the tibetan plateau.
WOS关键词	NORTH-ATLANTIC OSCILLATION ; ASIAN SUMMER MONSOON ; INTERANNUAL VARIABILITY ; ARCTIC OSCILLATION ; JET-STREAM ; EAST-ASIA ; CLIMATE ; CHINA ; PRECIPITATION ; AEROSOLS
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
语种	英语
出版者	AMER METEOROLOGICAL SOC
WOS记录号	WOS:000234079900005
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2377035
专题	中国科学院大学
通讯作者	Yu, RC
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, LASG, State Key Lab Numer Modeling Atmospher Sci & Geop, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100029, Peoples R China 3.Univ Hawaii, Dept Meteorol, Honolulu, HI 96822 USA 4.Univ Hawaii, IPRC, Honolulu, HI 96822 USA
推荐引用方式 GB/T 7714	Li, J,Yu, RC,Zhou, TJ,et al. Why is there an early spring cooling shift downstream of the tibetan plateau?[J]. Journal of climate,2005,18(22):4660-4668.
APA	Li, J,Yu, RC,Zhou, TJ,&Wang, B.(2005).Why is there an early spring cooling shift downstream of the tibetan plateau?.Journal of climate,18(22),4660-4668.
MLA	Li, J,et al."Why is there an early spring cooling shift downstream of the tibetan plateau?".Journal of climate 18.22(2005):4660-4668.

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