Spatiotemporal Variations in Drought and Wetness from 1965 to 2017 in China

doi:10.3390/w12082097

	Spatiotemporal Variations in Drought and Wetness from 1965 to 2017 in China
	Zeng, Zhaoqi 2,3; Wu, Wenxiang 2,4; Li, Yamei 3,5; Zhou, Yang 2; Zhang, Zhengtao 2; Zhang, Shuilong 6; Guo, Yahui 1; Huang, Han 2,3; Li, Zhaolei 7
刊名	WATER
	2020-08-01
卷号	12 期号:8 页码:22
关键词	China standardized precipitation evapotranspiration index drought wetness trend
DOI	10.3390/w12082097
通讯作者	Wu, Wenxiang(wuwx@igsnrr.ac.cn) ; Li, Zhaolei(zhaoleilee@sdau.edu.cn)
英文摘要	Drought and extreme precipitation events can have major environmental and socioeconomic impacts. Yet, how drought and wetness are changing in China in the context of climate change is still under debate. Here, the standardized precipitation evapotranspiration index (SPEI) was calculated based on high-quality and more densely distributed daily meteorological observation data from 655 stations across China during the period of 1965-2017. National and regional trends in drought and wetness and their various characteristics, including intensity, duration, frequency, and percentage of area affected, were investigated at multiple timescales. We found that (1) China as a whole has undergone a significant (p< 0.01, trend significant at the level of 0.01) wetting trend, with an annual SPEI increase of 0.5 per decade from 1965 to 2017. A seasonal wetting trend was also observed, with summer being particularly significant (p< 0.01). (2) Regionally, each subregion also showed a wetting trend during the study period except for southwest China, and these wetting trends were significant in the western region of northwest China (p< 0.05, trend significant at the level of 0.05), the Tibetan Plateau (p< 0.05), and eastern China (p= 0.06). (3) Decadal trends in drought and wetness intensity, frequency, duration, and affected areas indicated that the drought events also became more severe and more frequent in the last two decades, and the areas showing drying trends were mainly located in southwest China (especially for the autumn drought) and the southwestern parts of eastern northwest China (spring drought). Our results highlight the fact that although a wetting trend was observed in most regions of China, the frequent occurrence of severe drought in southwest China and the southwestern parts of eastern northwest China still present a considerable threat to both the environment and society. Therefore, how to effectively coordinate the allocation of regional water resources to cope with drought risk under future climate change will be particularly important.
资助项目	Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19040304] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA19040101] ; National Key Research and Development Program of China
WOS关键词	CLIMATE-CHANGE ; REFERENCE EVAPOTRANSPIRATION ; PAN EVAPORATION ; LOESS PLATEAU ; PRECIPITATION ; INDEX ; PATTERNS ; ARIDITY ; TREND ; ENSO
WOS研究方向	Water Resources
语种	英语
出版者	MDPI
WOS记录号	WOS:000564850200001
资助机构	Strategic Priority Research Program of the Chinese Academy of Sciences ; National Key Research and Development Program of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/158066]
专题	中国科学院地理科学与资源研究所
通讯作者	Wu, Wenxiang; Li, Zhaolei
作者单位	1.Beijing Normal Univ, Coll Water Sci, Beijing Key Lab Urban Hydrol Cycle & Sponge City, Beijing 100875, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Land Surface Pattern & Simulat, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Coll Resource & Environm, Beijing 100049, Peoples R China 4.Chinese Acad Sci, CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 5.Chinese Acad Sci, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China 6.China Univ Geosci, Sch Land Sci & Technol, Beijing 100083, Peoples R China 7.Shandong Agr Univ, Key Lab Agr Environm Univ Shandong, Coll Resources & Environm, Natl Engn Lab Efficient Utilizat Soil & Fertilize, Tai An 271018, Shandong, Peoples R China
推荐引用方式 GB/T 7714	Zeng, Zhaoqi,Wu, Wenxiang,Li, Yamei,et al. Spatiotemporal Variations in Drought and Wetness from 1965 to 2017 in China[J]. WATER,2020,12(8):22.
APA	Zeng, Zhaoqi.,Wu, Wenxiang.,Li, Yamei.,Zhou, Yang.,Zhang, Zhengtao.,...&Li, Zhaolei.(2020).Spatiotemporal Variations in Drought and Wetness from 1965 to 2017 in China.WATER,12(8),22.
MLA	Zeng, Zhaoqi,et al."Spatiotemporal Variations in Drought and Wetness from 1965 to 2017 in China".WATER 12.8(2020):22.