干旱区生态环境知识资源中心(Arid): Dynamic Evolution and Copula-Based Multivariable Frequency Analysis of Meteorological Drought Considering the Spatiotemporal Variability in Northwestern China

Arid

DOI	10.3390/w15213861
	Dynamic Evolution and Copula-Based Multivariable Frequency Analysis of Meteorological Drought Considering the Spatiotemporal Variability in Northwestern China
	Zhang, Weijie; Feng, Kai; Wang, Fei; Wang, Wenjun; Zhang, Zezhong; Wang, Yingying; Huang, Shengzhi
通讯作者	Feng, K
来源期刊	WATER
EISSN	2073-4441
出版年	2023
卷号	15 期号:21
英文摘要	Meteorological drought is a continuous spatiotemporal phenomenon that poses a serious threat to water resource security. Dynamic evolution and multivariable frequency analysis of meteorological drought are important for effective drought mitigation and risk management. Therefore, this study aims to analyze meteorological drought events in northwestern China between 1960 and 2018 based on the standardized precipitation evapotranspiration index (SPEI) through a three-dimensional identification method. This study investigates the meteorological drought dynamic evolution on different time and space scales and evaluates the frequency analysis considering the spatiotemporal variability based on Copula. The results show that SPEI presents an upward trend in Northwestern China. A trend towards increased humidity is observed in arid regions, contrasted by a trend towards aridification in semi-arid and semi-humid areas, indicating that the spatial distribution of drought in the study area tends towards homogenization. The possibility of high-intensity drought events occurring in the same area was relatively low, whereas low-intensity drought events were frequent. Additionally, this study analyzes the dynamic migration process of individual drought events from a three-dimensional perspective. Neglecting any one drought variable could significantly underestimate the occurring probability of severe drought events. Therefore, a multivariable frequency analysis considering the spatiotemporal variability plays a crucial role in the formulation of drought prevention and mitigation strategies, as well as drought forecasting.
英文关键词	meteorological drought standardized precipitation evapotranspiration index (SPEI) drought identification dynamic evolution frequency analysis northwest China
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:001100490000001
WOS关键词	RIVER-BASIN ; PRECIPITATION ; ARIDITY ; TIME
WOS类目	Environmental Sciences ; Water Resources
WOS研究方向	Environmental Sciences & Ecology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/399096
推荐引用方式 GB/T 7714	Zhang, Weijie,Feng, Kai,Wang, Fei,et al. Dynamic Evolution and Copula-Based Multivariable Frequency Analysis of Meteorological Drought Considering the Spatiotemporal Variability in Northwestern China[J],2023,15(21).
APA	Zhang, Weijie.,Feng, Kai.,Wang, Fei.,Wang, Wenjun.,Zhang, Zezhong.,...&Huang, Shengzhi.(2023).Dynamic Evolution and Copula-Based Multivariable Frequency Analysis of Meteorological Drought Considering the Spatiotemporal Variability in Northwestern China.WATER,15(21).
MLA	Zhang, Weijie,et al."Dynamic Evolution and Copula-Based Multivariable Frequency Analysis of Meteorological Drought Considering the Spatiotemporal Variability in Northwestern China".WATER 15.21(2023).