气候变化领域集成服务门户(CCPortal): Why Has the Inner Tibetan Plateau Become Wetter since the Mid-1990s?

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DOI	10.1175/JCLI-D-19-0471.1
	Why Has the Inner Tibetan Plateau Become Wetter since the Mid-1990s?
	Sun, Jing; Yang, Kun; Guo, Weidong; Wang, Yan; He, Jie; Lu, Hui
通讯作者	Yang, K (通讯作者)
发表日期	2020
ISSN	0894-8755
EISSN	1520-0442
起始页码	8507
结束页码	8522
卷号	33 期号:19
英文摘要	The Inner Tibetan Plateau (ITP; also called the Qiangtang Plateau) appears to have experienced an overall wetting in summer (June, July, and August) since the mid-1990s, which has caused the rapid expansion of thousands of lakes. In this study, changes in atmospheric circulations associated with the wetting process are analyzed for 1979-2018. These analyses show that the wetting is associated with simultaneously weakened westerlies over the Tibetan Plateau (TP). The latter is further significantly correlated with the Atlantic multidecadal oscillation (AMO) on interdecadal time scales. The AMO has been in a positive phase (warm anomaly of the North Atlantic Ocean sea surface) since the mid-1990s, which has led to both a northward shift and weakening of the subtropical westerly jet stream at 200 hPa near the TP through a wave train of cyclonic and anticyclonic anomalies over Eurasia. These anomalies are characterized by an anomalous anticyclone to the east of the ITP and an anomalous cyclone to the west of the ITP. The former weakens the westerly winds, trapping water vapor over the ITP while the latter facilitates water vapor intruding from the Arabian Sea into the ITP. Accordingly, summer precipitation over the ITP has increased since the mid-1990s.
关键词	MERIDIONAL DISPLACEMENT LAKE EXPANSION CLIMATE-CHANGE WESTERLY JET PRECIPITATION RAINFALL STREAM CHINA VARIABILITY DYNAMICS
英文关键词	Teleconnections; Jets; Precipitation; Summer/warm season; Wind
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000589983000019
来源期刊	JOURNAL OF CLIMATE
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/259797
推荐引用方式 GB/T 7714	Sun, Jing,Yang, Kun,Guo, Weidong,et al. Why Has the Inner Tibetan Plateau Become Wetter since the Mid-1990s?[J]. 中国科学院青藏高原研究所,2020,33(19).
APA	Sun, Jing,Yang, Kun,Guo, Weidong,Wang, Yan,He, Jie,&Lu, Hui.(2020).Why Has the Inner Tibetan Plateau Become Wetter since the Mid-1990s?.JOURNAL OF CLIMATE,33(19).
MLA	Sun, Jing,et al."Why Has the Inner Tibetan Plateau Become Wetter since the Mid-1990s?".JOURNAL OF CLIMATE 33.19(2020).