气候变化领域集成服务门户(CCPortal): A novel index for vegetation drought assessment based on plant water metabolism and balance under vegetation restoration on the Loess Plateau

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DOI	10.1016/j.scitotenv.2024.170549
	A novel index for vegetation drought assessment based on plant water metabolism and balance under vegetation restoration on the Loess Plateau
	Wang, Ai; Gao, Xuerui; Zhou, Zeyu; Siddique, Kadambot H. M.; Yang, Hao; Wang, Jichao; Zhang, Shuyu; Zhao, Xining
发表日期	2024
ISSN	0048-9697
EISSN	1879-1026
起始页码	918
卷号	918
英文摘要	Vegetation is vital to the ecosystem, contributing to the global carbon balance, but susceptible to the impacts of climate change. Monitoring vegetation drought remains challenging due to the lack of widely accepted drought indices. This study focused on vegetation, and simulated the vegetation suitable water demand and soil available water supply (calculated by Remote-sensing-based Water Balance Assessment Tool model). The standardized Vegetation Water deficit Index (SVWDI) was established by calculating the vegetation water deficit, which reflects the response of vegetation to drought. We examined the spatiotemporal evolution of vegetation drought on the Loess Plateau and evaluated the applicability of standardized vegetation water deficit index. Our findings revealed that the standardized vegetation water deficit index demonstrated an overall upward trend across different time scales from 1991 to 2020. Drought conditions were concentrated in the first 20 years of the study period, but vegetation drought on the Loess Plateau has been alleviated in the past decade. Moreover, as the time scale extended, the trend of SVWDI generally decreased, with approximately 49.50 % (1-month scale), 46.66 % (3 -month scale), 47.08 % (12 -month scale), and 32.16 % (24 -month scale) of the grid areas experiencing increased SVWDI. The correlation between SVWDI and tree -ring width index (TRWI) performed well under all precipitation gradients, but the Palmer drought severity index (PDSI) was only highly correlated with TRWI in regions with low precipitation. In terms of the relationship with vegetation health, SVWDI demonstrated the highest correlation with the normalized difference vegetation index (NDVI) across different time scales, followed by PDSI and standardized precipitation evapotranspiration index (SPEI). This study provides insights into the evolution of vegetation drought in response to climate change. The findings can guide initiatives such as returning farmland to forest and grassland on the Loess Plateau to aid climate change adaptation strategies.
英文关键词	Loess Plateau; Vegetation; Drought index; Water deficit; Climate change
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:001183417800001
来源期刊	SCIENCE OF THE TOTAL ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/309065
作者单位	Northwest A&F University - China; Northwest A&F University - China; Northwest A&F University - China; Chinese Academy of Sciences; Institute of Soil & Water Conservation (ISWC), CAS; University of Western Australia; Southern University of Science & Technology
推荐引用方式 GB/T 7714	Wang, Ai,Gao, Xuerui,Zhou, Zeyu,et al. A novel index for vegetation drought assessment based on plant water metabolism and balance under vegetation restoration on the Loess Plateau[J],2024,918.
APA	Wang, Ai.,Gao, Xuerui.,Zhou, Zeyu.,Siddique, Kadambot H. M..,Yang, Hao.,...&Zhao, Xining.(2024).A novel index for vegetation drought assessment based on plant water metabolism and balance under vegetation restoration on the Loess Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,918.
MLA	Wang, Ai,et al."A novel index for vegetation drought assessment based on plant water metabolism and balance under vegetation restoration on the Loess Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 918(2024).