干旱区生态环境知识资源中心(Arid): Global eight drought types: Spatio-temporal characteristics and vegetation response

Arid

DOI	10.1016/j.jenvman.2024.121069
	Global eight drought types: Spatio-temporal characteristics and vegetation response
	Ji, Yongyue; Zeng, Sidong; Yang, Linhan; Wan, Hui; Xia, Jun
通讯作者	Zeng, SD
来源期刊	JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN	0301-4797
EISSN	1095-8630
出版年	2024
卷号	359
英文摘要	The traditional classification of drought events into seasonal and flash types oversimplified the complexity and variability of global drought phenomena, limiting a deeper understanding of drought characteristics and their impacts on vegetation. To address this issue, soil moisture percentile methods and the Soil Moisture Anomaly Percentage Index (SMAPI) were employed to create time series for flash drought (FD) and seasonal drought (SD) events globally from 1981 to 2020. A novel categorization framework was proposed to subdivide the two basic drought categories into eight distinct drought types using a set relationship identification method. The results showed fluctuating trends in the frequencies of Independent FD and Inclusion FD, which declined rapidly after 2011 at rates of 0.05 and 0.04 times/year, respectively. Independent FD frequency was highest in humid areas and decreased with increasing aridity. The spatial distributions of Inclusion FD and SD were similar, with both frequencies highest in extremely arid areas and decreasing with increasing humidity. The frequency of Independent SD, which peaked in semi-arid areas, increased significantly after 2011 at a rate of 0.01 times/year. The occurrence of FD evolving into SD or emerging at the end of SD was rare, with a global average of 0.46 events/ decade and little spatial variation. Between 1981 and 2020, FD showed a U-shaped trend in drought duration, while SD showed no clear pattern. The duration of FD showed little difference across arid and humid zones, but the duration of SD decreased significantly with increasing humidity. Vegetation responses to drought varied, with arid regions showing longer response time compared to humid regions. A positive correlation between temperature and solar-induced chlorophyll fluorescence (SIF) during droughts was observed, while precipitation generally showed a negative correlation with SIF. Radiation had a minimal effect on SIF during droughts. The study offered a comprehensive categorization of drought events, enhancing our understanding of their spatiotemporal characteristics and vegetation responses on a global scale.
英文关键词	Flash drought Seasonal drought New categorization framework Vegetation response Solar-induced chlorophyll fluorescence
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001240288900001
WOS关键词	SOIL-MOISTURE ; FLASH DROUGHT ; PRODUCTIVITY ; INDEX ; VULNERABILITY ; MORTALITY ; FREQUENCY ; ECOSYSTEM ; MODELS ; FUTURE
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/2XILL650/404470
推荐引用方式 GB/T 7714	Ji, Yongyue,Zeng, Sidong,Yang, Linhan,et al. Global eight drought types: Spatio-temporal characteristics and vegetation response[J],2024,359.
APA	Ji, Yongyue,Zeng, Sidong,Yang, Linhan,Wan, Hui,&Xia, Jun.(2024).Global eight drought types: Spatio-temporal characteristics and vegetation response.JOURNAL OF ENVIRONMENTAL MANAGEMENT,359.
MLA	Ji, Yongyue,et al."Global eight drought types: Spatio-temporal characteristics and vegetation response".JOURNAL OF ENVIRONMENTAL MANAGEMENT 359(2024).