气候变化领域集成服务门户(CCPortal): Increasing summer precipitation in arid Central Asia linked to the weakening of the East Asian summer monsoon in the recent decades

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DOI	10.1002/joc.6727
	Increasing summer precipitation in arid Central Asia linked to the weakening of the East Asian summer monsoon in the recent decades
	Chen, Chunzhu; Zhang, Xiaojian; Lu, Huayu; Jin, Liya; Du, Yan; Chen, Fahu
通讯作者	Zhang, XJ (通讯作者)
发表日期	2021
ISSN	0899-8418
EISSN	1097-0088
起始页码	1024
结束页码	1038
卷号	41 期号:2
英文摘要	It is generally believed that water vapour from the North Atlantic transported by the mid-latitude westerlies dominates precipitation variations in arid Central Asia, where monsoonal water vapour source is beyond the reach. This study reexamines water vapour sources for arid Central Asia based on daily reanalysis data. The results reveal two water vapour sources for arid Central Asia: the westerly water vapour transport from the North Atlantic and the monsoonal water vapour transport from the tropical Indian Ocean and South China Sea. The monsoonal transport includes two pathways: lower tropospheric water vapour along the eastern and northern periphery of the Tibetan Plateau from the tropical Indian Ocean and South China Sea, and middle-upper tropospheric water vapour via the Tibetan Plateau from the tropical Indian Ocean. Precipitation variability during the monsoonal transport events explains 81% of the total variance. The monsoonal transport is related to a weakened East Asian summer monsoon (EASM) that is accompanied by persistent westward shift of the western Pacific subtropical high and increasing frequency of Mongolian anticyclone activities. The EASM has experienced a persistent weakening trend since 1958, causing an increasing contribution of the monsoonal water vapour transport and thereby enhancing summer precipitation in arid Central Asia. In particular, the monsoonal easterly water vapour has become the dominant source for arid Central Asia in the lower troposphere during the last decade. This study highlights the important role of the EASM in the wetting trend of summers in arid Central Asia during the past six decades.
关键词	CLIMATE-CHANGE CIRCUMGLOBAL TELECONNECTION INTERANNUAL VARIABILITY TEMPORAL VARIATION RAINFALL EVENTS INDIAN MONSOON CHINA HOLOCENE MOISTURE ASSOCIATION
英文关键词	arid Central Asia; East Asian summer monsoon; precipitation variation; water vapour; western Pacific subtropical high
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000552879700001
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
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/260365
推荐引用方式 GB/T 7714	Chen, Chunzhu,Zhang, Xiaojian,Lu, Huayu,et al. Increasing summer precipitation in arid Central Asia linked to the weakening of the East Asian summer monsoon in the recent decades[J]. 中国科学院青藏高原研究所,2021,41(2).
APA	Chen, Chunzhu,Zhang, Xiaojian,Lu, Huayu,Jin, Liya,Du, Yan,&Chen, Fahu.(2021).Increasing summer precipitation in arid Central Asia linked to the weakening of the East Asian summer monsoon in the recent decades.INTERNATIONAL JOURNAL OF CLIMATOLOGY,41(2).
MLA	Chen, Chunzhu,et al."Increasing summer precipitation in arid Central Asia linked to the weakening of the East Asian summer monsoon in the recent decades".INTERNATIONAL JOURNAL OF CLIMATOLOGY 41.2(2021).