干旱区生态环境知识资源中心(Arid): Spatial and temporal patterns of drought based on RW-PDSI index on Loess Plateau in the past three decades

Arid

DOI	10.1016/j.ecolind.2024.112409
	Spatial and temporal patterns of drought based on RW-PDSI index on Loess Plateau in the past three decades
	Yang, Hao; Gao, Xuerui; Sun, Mengqing; Wang, Ai; Sang, Yinan; Wang, Jichao; Zhao, Xining; Zhang, Shuyu
通讯作者	Gao, XR
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2024
卷号	166
英文摘要	Palmer Drought Severity Index (PDSI) is a widely used indicator to assess the intensity of drought based on a similar two-layer bucket (TLB) model, especially in arid and semi-arid regions. However, the TLB model cannot quantify surface water balance, effectively, which may lead to the mis-assessment of drought. Therefore, an optimized PDSI indicator named RW-PDSI based on the water balance is constructed. RW-PDSI is developed using the output of a newly proposed remote-sensing-based water balance assessment tool (RWBAT) model. The RWBAT model is constructed to depict the detailed hydrological processes on a fine spatial scale using highresolution remote sensing data. To test its performance, we collected tree-ring data on the Loess Plateau (LP) to show the drought conditions in past decades (1991-2020). Tree-ring data provide a useful continuous multiyear data archive for drought assessment. Our results showed that the correlation between RW-PDSI and treering data was statistically significant (p < 0.01) at Kongtong and Hengshan sites with 0.65 and 0.64 respectively. Meanwhile, RW-PDSI showed a greater overall correlation with the tree-ring data than the self-calibrating PDSI(SC-PDSI) and the Standardized Precipitation Evapotranspiration Index (SPEI). Results also illustrated that RW-PDSI of the LP region increased in the past three decades, indicating weakening drought frequency and intensity. The area with a significant weakening trend of drought in the investigated region accounts for 71 %. Overall, drought characteristics in LP were well represented by our drought indicators, which could provide research support for the sustainable development of the ecosystem and social economy in drought areas.
英文关键词	PDSI Loess Plateau Drought Tree-ring Hydrological Model
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001285411300001
WOS关键词	RIVER-BASIN ; SEVERITY INDEX ; CLIMATE-CHANGE ; EVAPOTRANSPIRATION ; IMPACT ; CHINA
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403411
推荐引用方式 GB/T 7714	Yang, Hao,Gao, Xuerui,Sun, Mengqing,et al. Spatial and temporal patterns of drought based on RW-PDSI index on Loess Plateau in the past three decades[J],2024,166.
APA	Yang, Hao.,Gao, Xuerui.,Sun, Mengqing.,Wang, Ai.,Sang, Yinan.,...&Zhang, Shuyu.(2024).Spatial and temporal patterns of drought based on RW-PDSI index on Loess Plateau in the past three decades.ECOLOGICAL INDICATORS,166.
MLA	Yang, Hao,et al."Spatial and temporal patterns of drought based on RW-PDSI index on Loess Plateau in the past three decades".ECOLOGICAL INDICATORS 166(2024).