干旱区生态环境知识资源中心(Arid): Concurrent droughts and hot extremes in northwest China from 1961 to 2017

Arid

DOI	10.1002/joc.5944
	Concurrent droughts and hot extremes in northwest China from 1961 to 2017
	Li, Xin1,2 ; You, Qinglong 1,4,5; Ren, Guoyu 3; Wang, Suyan 2; Zhang, Yuqing 1; Yang, Jianling 2; Zheng, Guangfen 2
通讯作者	You, Qinglong
来源期刊	INTERNATIONAL JOURNAL OF CLIMATOLOGY
ISSN	0899-8418
EISSN	1097-0088
出版年	2019
卷号	39 期号:4 页码:2186-2196
英文摘要	Northwest China forms the main part of the arid and semiarid areas in China, and even includes some extremely arid areas. This zone of interaction is affected by the westerlies and monsoons making it sensitive to global climate change. Drought is the main type of natural disaster affecting northwest China. Global warming has caused a gradual strengthening of the frequency and intensity of hot extremes, when dry conditions and heatwaves occur simultaneously or successively; as a result, that socioeconomic risks can increase considerably. The present study examined changes in concurrent droughts and hot extremes in northwest China during 1961-2017 based on data from 119 meteorological stations. The result shows that the frequency of concurrent droughts and hot extremes exhibited an increasing trend over most parts of northwest China, while a negative trend occurred in western Xinjiang and at some sites in Qinghai. Concurrent droughts and hot extremes appeared more often in May in western Xinjiang, and in summer in other parts of northwest China. Overall, the trends of such concurrent events, regardless of different definitions, increased from 1961-2017 over northwest China. In particular, from 1981-2017, the trend rose more significantly than in other decades, and reached an abrupt point of change in 1996. Although the trend changed from a positive significant signal to a negative one from 2001-2017, the trend grew 2-3 times from 1997-2017. Changes in large-scale atmospheric circulation show that an anticyclonic circulation strengthened, increasing in geopotential height over the midhigh latitudes of Eurasia and was centred on Mongolia and Lake Baikal. This enhanced relative humidity in western Xinjiang and eastern Qinghai, and weakened it elsewhere from 1997-2017. These changes have contributed to the changes in the spatial distribution and trends in concurrent droughts and hot extremes in northwest China.
英文关键词	concurrent droughts and hot extremes northwest China SPEI threshold
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000465456400025
WOS关键词	PROJECTED CHANGES ; CLIMATE EXTREMES ; TIBETAN PLATEAU ; SOIL-MOISTURE ; HEAT WAVES ; PRECIPITATION ; TEMPERATURE ; TRENDS ; INCREASE ; FREQUENT
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	南京信息工程大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/216375
作者单位	1.Nanjing Univ Informat Sci & Technol, Key Lab Meteorol Disaster, Minist Educ,Earth Syst Modeling Ctr, Joint Int Res Lab Climate & Environm Change,Colla, Nanjing, Jiangsu, Peoples R China; 2.CMA, Key Lab Meteorol Disaster Monitoring & Early Warn, Yinchuan, Peoples R China; 3.CMA, Lab Climate Studies, Natl Climate Ctr, Beijing, Peoples R China; 4.Fudan Univ, Dept Atmospher & Ocean Sci, Shanghai, Peoples R China; 5.Fudan Univ, Inst Atmospher Sci, Shanghai, Peoples R China
推荐引用方式 GB/T 7714	Li, Xin,You, Qinglong,Ren, Guoyu,et al. Concurrent droughts and hot extremes in northwest China from 1961 to 2017[J]. 南京信息工程大学,2019,39(4):2186-2196.
APA	Li, Xin.,You, Qinglong.,Ren, Guoyu.,Wang, Suyan.,Zhang, Yuqing.,...&Zheng, Guangfen.(2019).Concurrent droughts and hot extremes in northwest China from 1961 to 2017.INTERNATIONAL JOURNAL OF CLIMATOLOGY,39(4),2186-2196.
MLA	Li, Xin,et al."Concurrent droughts and hot extremes in northwest China from 1961 to 2017".INTERNATIONAL JOURNAL OF CLIMATOLOGY 39.4(2019):2186-2196.