干旱区生态环境知识资源中心(Arid): Spatiotemporal variations of drought and driving factors based on multiple remote sensing drought indices: A case study in karst areas of southwest China

Arid

DOI	10.1007/s11629-023-7927-7
	Spatiotemporal variations of drought and driving factors based on multiple remote sensing drought indices: A case study in karst areas of southwest China
	Lu, Xian-jian; Li, Zhen-bao; Yan, Hong-bo; Liang, Yue-ji
通讯作者	Yan, HB
来源期刊	JOURNAL OF MOUNTAIN SCIENCE
ISSN	1672-6316
EISSN	1993-0321
出版年	2023
卷号	20 期号:11 页码:3215-3232
英文摘要	Droughts are recurrent in southwest China due to the fragility and sensitivity of the karst environment. These events have serious impacts on local agricultural output, ecological diversity, and social stability. Understanding spatiotemporal variations and driving factors of drought in this area is of extreme importance for effective mitigation measures. The karst areas situated in southwest China were spatially divided into seven sub-regions according to the topography and degree of karst development. Drought indices, including vegetation condition index (VCI), temperature condition index (TCI), vegetation health index (VHI), normalized vegetation water supply index (NVSWI), and temperature vegetation drought index (TVDI), were calculated from MODIS data during 2000 and 2018 for each sub-region, and drought patterns were examined. The results show that droughts were found to be concentrated in sub-regions such as karst basin, karst plateau, karst gorge, and karst depression areas. Furthermore, there were more drought conditions in karst areas than in non-karst areas. In addition, improvements to drought situation in the study period are significant (p<0.05), and mitigation areas respectively account for 80.1% (NVSWI), 74.2% (VCI), 74.2% (VHI), 30.1% (TCI) and 33.2% (TVDI) of the study area, while drought expands slightly (<3.4%) in areas undergoing urban construction. Pearson's correlation coefficients between drought indices and temperature are generally above 0.5 in all sub-regions. However, the correlation coefficients between drought indices and precipitation mostly fall within the range of 0.3-0.4, indicating a weaker correlation. Our explanation for the spatiotemporal patterns of drought is that karst phenomena are the natural basis of drought and agricultural production is one of important driving forces. Positive changes of drought conditions have benefited from efforts to control rocky desertification and restore ecosystems over the past years.
英文关键词	Drought Driving factors Karst phenomena Remote sensing
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001110550800017
WOS关键词	METEOROLOGICAL DROUGHT ; VEGETATION INDEX ; TEMPERATURE ; DYNAMICS
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397491
推荐引用方式 GB/T 7714	Lu, Xian-jian,Li, Zhen-bao,Yan, Hong-bo,et al. Spatiotemporal variations of drought and driving factors based on multiple remote sensing drought indices: A case study in karst areas of southwest China[J],2023,20(11):3215-3232.
APA	Lu, Xian-jian,Li, Zhen-bao,Yan, Hong-bo,&Liang, Yue-ji.(2023).Spatiotemporal variations of drought and driving factors based on multiple remote sensing drought indices: A case study in karst areas of southwest China.JOURNAL OF MOUNTAIN SCIENCE,20(11),3215-3232.
MLA	Lu, Xian-jian,et al."Spatiotemporal variations of drought and driving factors based on multiple remote sensing drought indices: A case study in karst areas of southwest China".JOURNAL OF MOUNTAIN SCIENCE 20.11(2023):3215-3232.