Temporal and spatial dynamics of spring drought in Qinghai-Tibet region based on VCI index

doi:10.6046/gtzyyg.2020228

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Abstract

The spatial-temporal characteristics of spring drought are very important for decision-making and many agricultural applications. In this study, the spatial-temporal analysis of vegetation drought in Qinghai-Tibet region from 1995 to 2010 was carried out by using the vegetation state index of NOAA. According to the characteristics of VCI as a drought index, a variety of methods were used, which included frequency analysis, trend analysis and man Kendall experiment. The results show that the Qinghai-Tibet Region is less affected by monsoon, the frequency of drought in Hengduan Mountain and Qilian Mountain is relatively low, and most of the droughts are light and medium drought. According to the analysis, the trend of drought in this area is not unidirectional and can be divided into two stages. Before 2000, the VCI index was relatively high, and the volatility was relatively large; after 2000, the VCI index was relatively low, and relatively stable.

Keywords spring drought VCI Mann-Kendall experiment

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P237

Issue Date: 18 March 2021

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	Min JI
	Chao ZHANG
	Jianwei ZHAO
	Juan YAN
	Liang LIANG

Cite this article:

Min JI,Chao ZHANG,Jianwei ZHAO, et al. Temporal and spatial dynamics of spring drought in Qinghai-Tibet region based on VCI index[J]. Remote Sensing for Land & Resources, 2021, 33(1): 152-157.

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https://www.gtzyyg.com/EN/10.6046/gtzyyg.2020228 OR https://www.gtzyyg.com/EN/Y2021/V33/I1/152

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