气候变化领域集成服务门户(CCPortal): Changes of Extreme Precipitation and its Associated Mechanisms in Northwest China

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DOI	10.1007/s00376-021-0409-3
	Changes of Extreme Precipitation and its Associated Mechanisms in Northwest China
	Lu, Shan; Hu, Zeyong; Yu, Haipeng; Fan, Weiwei; Fu, Chunwei; Wu, Di
通讯作者	Hu, ZY (通讯作者)，Chinese Acad Sci, Key Lab Land Surface Proc & Climate Change Cold &, Northwest Inst Ecoenviron & Resources, Lanzhou 730000, Peoples R China. ; Hu, ZY (通讯作者)，Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China.
发表日期	2021
ISSN	0256-1530
EISSN	1861-9533
起始页码	1665
结束页码	1681
卷号	38 期号:10
英文摘要	Characterized by scarce water resources and fragile ecosystems, Northwest China (NWC) has experienced a climate shift from warm-dry to warm-wet conditions since the 1980s that has garnered extensive concern in recent years. In this study, the variability in extreme precipitation (EP) during 1961-2016 in different climate zones of NWC and the possible mechanisms for this variation are investigated. The results show that the EP trends significantly increased in most of the westerly zone (WZ) and plateau zone (PZ), while the EP trends did not significantly decrease in the monsoon zone (MZ). The start dates of extreme precipitation (SDEP) and end dates of extreme precipitation (EDEP) advanced and were postponed, respectively, in the WZ and PZ, while the opposite occurred in the MZ. Summer atmospheric circulation, water vapor transport, and atmospheric instability over NWC varied greatly with the interdecadal shift in EP before and after 1986. During 1986-2016, upper-level divergence and lower-level convergence occurred in the MZ and PZ, which strengthened ascending flow. In addition, the summer water vapor and atmospheric instability increased in the WZ and PZ. These characteristics created favorable conditions for increased occurrences of EP in the WZ and PZ in summer. Conversely, the upper-level convergence and lower-level divergence in the MZ strengthened descending flow. Decreases in summer water vapor and atmospheric instability occurred in the MZ after 1986. Hence, the environmental conditions in the MZ may have prevented the occurrence and development of EP in summer during 1986-2016.
关键词	ASIAN SUMMER MONSOON TELECONNECTION CLIMATE TRENDS VARIABILITY CIRCULATION RAINFALL
英文关键词	EP; climate shift; atmospheric circulation; water vapor transport; instability
语种	英语
WOS研究方向	Meteorology & Atmospheric Sciences
WOS类目	Meteorology & Atmospheric Sciences
WOS记录号	WOS:000667628000001
来源期刊	ADVANCES IN ATMOSPHERIC SCIENCES
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254239
作者单位	[Lu, Shan; Hu, Zeyong; Yu, Haipeng; Fan, Weiwei; Fu, Chunwei; Wu, Di] Chinese Acad Sci, Key Lab Land Surface Proc & Climate Change Cold &, Northwest Inst Ecoenviron & Resources, Lanzhou 730000, Peoples R China; [Lu, Shan] Shaanxi Meteorol Serv Ctr, Xian 710014, Peoples R China; [Hu, Zeyong] Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China; [Lu, Shan; Fan, Weiwei; Fu, Chunwei; Wu, Di] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Lu, Shan,Hu, Zeyong,Yu, Haipeng,et al. Changes of Extreme Precipitation and its Associated Mechanisms in Northwest China[J]. 中国科学院西北生态环境资源研究院,2021,38(10).
APA	Lu, Shan,Hu, Zeyong,Yu, Haipeng,Fan, Weiwei,Fu, Chunwei,&Wu, Di.(2021).Changes of Extreme Precipitation and its Associated Mechanisms in Northwest China.ADVANCES IN ATMOSPHERIC SCIENCES,38(10).
MLA	Lu, Shan,et al."Changes of Extreme Precipitation and its Associated Mechanisms in Northwest China".ADVANCES IN ATMOSPHERIC SCIENCES 38.10(2021).