干旱区生态环境知识资源中心(Arid): Attribution of Extreme Drought Events and Associated Physical Drivers across Southwest China Using the Budyko Framework

Arid

DOI	10.3390/rs15112702
	Attribution of Extreme Drought Events and Associated Physical Drivers across Southwest China Using the Budyko Framework
	Sun, Xupeng; Wang, Jinghan; Ma, Mingguo; Han, Xujun
通讯作者	Han, XJ
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2023
卷号	15 期号:11
英文摘要	Drought is a meteorological phenomenon that negatively impacts agricultural production. In recent years, southwest China has frequently experienced agricultural droughts; these have significantly impacted the economy and the ecological environment. Although several studies have been conducted on agricultural droughts, few have examined the factors driving agricultural droughts from the perspective of water and energy balance. This study aimed to address this gap by utilizing the Standardized Soil Moisture Index (SSMI) and the Budyko model to investigate agricultural drought in southwest China. The study identified four areas in Southwest China with a high incidence of agricultural drought from 2000 to 2020. Yunnan and the Sichuan-Chongqing border regions experienced drought in 10% of the months during the study period, while Guangxi and Guizhou had around 8% of months with drought. The droughts in these regions exhibited distinct seasonal characteristics, with Yunnan experiencing significantly higher drought frequency than other periods from January to June, while Guizhou and other areas were prone to severe droughts in summer and autumn. The Budyko model is widely used as the mainstream international framework for studying regional water and energy balance. In this research, the Budyko model was applied to analyze the water and energy balance characteristics in several arid regions of southwest China using drought monitoring data. Results indicate that the water and energy balances in Yunnan and Sichuan-Chongqing are more moisture-constrained, whereas those in Guizhou and Guangxi are relatively stable, suggesting lower susceptibility to extreme droughts. Furthermore, during severe drought periods, evapotranspiration becomes a dominant component of the water cycle, while available water resources such as soil moisture decrease. After comparing the causes of drought and non-drought years, it was found that the average rainfall in southwest China is approximately 30% below normal during drought years, and the temperature is 1-2% higher than normal. These phenomena are most noticeable during the spring and winter months. Additionally, vegetation transpiration is about 10% greater than normal during dry years in Southwest China, and soil evaporation increases by about 5% during the summer and autumn months compared to normal conditions.
英文关键词	agricultural drought Budyko water balance soil moisture
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:001005773300001
WOS关键词	SOIL-MOISTURE ; AGRICULTURAL DROUGHT ; CLIMATE-CHANGE ; EVAPOTRANSPIRATION ; INDEX ; MORTALITY ; SEVERITY ; IMPACTS ; MODEL
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/398283
推荐引用方式 GB/T 7714	Sun, Xupeng,Wang, Jinghan,Ma, Mingguo,et al. Attribution of Extreme Drought Events and Associated Physical Drivers across Southwest China Using the Budyko Framework[J],2023,15(11).
APA	Sun, Xupeng,Wang, Jinghan,Ma, Mingguo,&Han, Xujun.(2023).Attribution of Extreme Drought Events and Associated Physical Drivers across Southwest China Using the Budyko Framework.REMOTE SENSING,15(11).
MLA	Sun, Xupeng,et al."Attribution of Extreme Drought Events and Associated Physical Drivers across Southwest China Using the Budyko Framework".REMOTE SENSING 15.11(2023).