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DOI	10.1016/j.jhydrol.2021.127224
	Application of an improved spatio-temporal identification method of flash droughts
	Gou, Qiqi; Zhu, Yonghua; Lu, Haishen; Horton, Robert; Yu, Xiaohan; Zhang, Haoqiang; Wang, Xiaoyi; Su, Jianbin; Liu, En; Ding, Zhenzhou; Wang, Zhenlong; Yuan, Fei
通讯作者	Zhu, YH ; Lu, HS (通讯作者)
发表日期	2022
ISSN	0022-1694
EISSN	1879-2707
卷号	604
英文摘要	Flash droughts are regional phenomena that can manifest in large areas with rapid intensification for a period of time. Few studies have considered the spatial pathways of flash droughts or their drought period. This study uses the five criteria based on the standardized evaporative stress ratio (SESR) method to identify flash droughts, and when a SESR value recovers to the 20th percentile, the flash drought is considered to terminate. To define spatially continuous flash droughts accurately, the usual order of first calculating drought patches and then identifying flash droughts is reversed to first identify flash droughts on the grid and then determine flash drought patches. In addition, this study tracks the spatial paths of flash droughts via centroid transfers of flash drought patches. Using MOD16 data, the methodology is evaluated by analyzing the regional characteristics of flash droughts in the Huaibei Plain of China from 2001 to 2019. The flash droughts in this region most frequently tracked in the northeast and west. The average flash drought duration was 31 days, of which the rapid intensification period was 18 days and drought period was 14 days. Flash drought events in this region mostly occurred in May, August and October, and east to west transition and non-transitions, which accounted for 44% and 22%, respectively, were the main spatial track paths. Only 26% of flash drought events transitioned to long term drought events. This study expands our knowledge of the evolution process of flash droughts to space-time dimensions, which is essential for flash droughts early warning and agricultural water management.
关键词	PRECIPITATION DEFICIT EVAPORATIVE DEMAND RIVER-BASIN ONSET FLOOD ZONE SOIL
英文关键词	Agricultural drought; Spatio-temporal drought analysis; Standardized evaporative stress ratio
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000752009700006
来源期刊	JOURNAL OF HYDROLOGY
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/260697
推荐引用方式 GB/T 7714	Gou, Qiqi,Zhu, Yonghua,Lu, Haishen,et al. Application of an improved spatio-temporal identification method of flash droughts[J]. 中国科学院青藏高原研究所,2022,604.
APA	Gou, Qiqi.,Zhu, Yonghua.,Lu, Haishen.,Horton, Robert.,Yu, Xiaohan.,...&Yuan, Fei.(2022).Application of an improved spatio-temporal identification method of flash droughts.JOURNAL OF HYDROLOGY,604.
MLA	Gou, Qiqi,et al."Application of an improved spatio-temporal identification method of flash droughts".JOURNAL OF HYDROLOGY 604(2022).