干旱区生态环境知识资源中心(Arid): Re-intensification of flash drought in western China over the past decade: Implications of fluctuating wetting trend

Arid

DOI	10.1016/j.scitotenv.2024.170878
	Re-intensification of flash drought in western China over the past decade: Implications of fluctuating wetting trend
	Zhang, Erya; Wang, Qingzheng; Guan, Qingyu; Yang, Xinyue; Luo, Haiping; Zhang, Jun; Du, Qinqin; Zhang, Zepeng
通讯作者	Guan, QY
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
EISSN	1879-1026
出版年	2024
卷号	919
英文摘要	Climate changes and human activities have led to a rise of frequency and intensity of the global flash droughts, resulting in severe consequences for ecosystems, agriculture, and human societies. However, research dedicated to flash droughts in the dryland of western China is relatively limited, leaving their evolutionary characteristics and development processes of these phenomena unclear. To bridge this gap, this study analyzed the spatiotemporal characteristics of flash droughts in western China from 1981 to 2020, based on the standardized evapotranspiration stress index. Additionally, we investigated the development mechanisms by taking meteorological conditions and soil moisture into account. The findings revealed that the northern Qinghai -Tibet Plateau, western Qilian Mountains, and western and southern Loess Plateau are hotspots of flash droughts, characterized by rapid development rates. Across most of the study area, flash drought events persisted between 25 and 30 days. Adequate precipitation is necessary before the onset of flash droughts in western China, while water scarcity and high temperatures played crucial roles in driving the mid -stage of flash droughts. Within the context of the observed warming and wetting trend, the average flash droughts occurrence from 2011 to 2020 was approximately 16 % lower than that from 1981 to 1990, and there was a significant annual decrease in spatial coverage of 0.01 % per year. However, in the wetting in west, drying in east trend, the spatial coverage of flash droughts has shifted from a declining trend to an insignificant increasing trend since 2000 in the study area, with significant regional differences between the western and eastern regions. Over the past decade, flash droughts had once again intensified in the central Qinghai -Tibet Plateau and the Loess Plateau due to warming and fluctuating wetting trends, raising significant concerns for future ecosystem and agricultural water management in these regions.
英文关键词	Flash drought Evapotranspiration Soil moisture Arid and semi-arid area Standardized evaporative stress ratio
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001188466300001
WOS关键词	WATER-VAPOR ; ONSET ; PRECIPITATION ; VEGETATION ; PLATEAU
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405470
推荐引用方式 GB/T 7714	Zhang, Erya,Wang, Qingzheng,Guan, Qingyu,et al. Re-intensification of flash drought in western China over the past decade: Implications of fluctuating wetting trend[J],2024,919.
APA	Zhang, Erya.,Wang, Qingzheng.,Guan, Qingyu.,Yang, Xinyue.,Luo, Haiping.,...&Zhang, Zepeng.(2024).Re-intensification of flash drought in western China over the past decade: Implications of fluctuating wetting trend.SCIENCE OF THE TOTAL ENVIRONMENT,919.
MLA	Zhang, Erya,et al."Re-intensification of flash drought in western China over the past decade: Implications of fluctuating wetting trend".SCIENCE OF THE TOTAL ENVIRONMENT 919(2024).