干旱区生态环境知识资源中心(Arid): Evaluation of the applicability of multiple drought indices in the core zone of westerlies-dominated climatic regime

Arid

DOI	10.1007/s11430-022-1097-0
	Evaluation of the applicability of multiple drought indices in the core zone of westerlies-dominated climatic regime
	Guo, Huiwen; Huang, Wei; Xie, Tingting; Ma, Shuai
通讯作者	Huang, W
来源期刊	SCIENCE CHINA-EARTH SCIENCES
ISSN	1674-7313
EISSN	1869-1897
出版年	2023
卷号	66 期号:7 页码:1504-1520
英文摘要	Drought indices are frequently used to measure the intensity, start and end of droughts. However, the performances of these indices depend on regions and the type of droughts. Therefore, it is necessary to evaluate whether these indices are applicable for a given region. This study evaluated the ability of the self-calibrating Palmer Drought Severity Index (scPDSI), the Standardized Precipitation Evapotranspiration Index (SPEI), and the Standardized Moisture Anomaly Index (SZI) to describe the dry-wet conditions and drought events in the core zone of the westerlies-dominated climatic regime. The results showed that the 12-month SZI (SZI12) and SPEI (SPEI12) have good correlations with precipitation and PET respectively, while the scPDSI can capture the changes in precipitation and soil moisture. In Xinjiang region of China, the SZI12 and scPDSI showed that this region gradually became wetter during 1961-2014, which was consistent with increased precipitation, decreased PET, and improved vegetation. However, the SPEI12 showed significant drying due to the strong influence of the PET, suggesting that this index exaggerated the drought conditions in this region. Precipitation in Kazakhstan and the southern Central Asian regions has increased slightly over the past 50 years, but the PET has greatly increased, altogether, all three indices suggested a drying trend in Central Asia. The evaluation of the ability of these drought indices to identify typical drought events in Xinjiang region of China suggested that the scPDSI can better detect the typical drought events compared with the SZI12. In conclusion, the scPDSI is the most suitable index for characterizing the long-term trend of hydroclimate conditions and drought events in the core zone of the westerlies-dominated climatic regime. This study provides a theoretical basis for the rational utilization and improvement of the drought index, which is critical for monitoring, attributing, and predicting of drought events in arid areas.
英文关键词	Drought index Applicability of the drought index Hydroclimate conditions Potential evapotranspiration Drought events
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001002891600001
WOS关键词	SEVERITY INDEX ; SOIL-MOISTURE ; TRENDS ; PRECIPITATION ; VEGETATION ; VARIABILITY ; SENSITIVITY ; ASSESSMENTS ; DATASET ; CHINA
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398464
推荐引用方式 GB/T 7714	Guo, Huiwen,Huang, Wei,Xie, Tingting,et al. Evaluation of the applicability of multiple drought indices in the core zone of westerlies-dominated climatic regime[J],2023,66(7):1504-1520.
APA	Guo, Huiwen,Huang, Wei,Xie, Tingting,&Ma, Shuai.(2023).Evaluation of the applicability of multiple drought indices in the core zone of westerlies-dominated climatic regime.SCIENCE CHINA-EARTH SCIENCES,66(7),1504-1520.
MLA	Guo, Huiwen,et al."Evaluation of the applicability of multiple drought indices in the core zone of westerlies-dominated climatic regime".SCIENCE CHINA-EARTH SCIENCES 66.7(2023):1504-1520.