Spatial and Temporal Variations of NDVI in Gansu, China from 2000 to 2014

doi:10.7522/j.issn.1000-694X.2016.00171

JOURNAL OF DESERT RESEARCH ›› 2018, Vol. 38 ›› Issue (2): 418-427.DOI: 10.7522/j.issn.1000-694X.2016.00171

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Spatial and Temporal Variations of NDVI in Gansu, China from 2000 to 2014

Cao Bo, Zhang Bo, Ma Bin, Wang Guoqiang, Tang Min, Zhang Yaozong, Jia Yanqing

College of Geography and Environmental Science, Northwest Normal University, Lanzhou 730070, China

Received:2016-10-12 Revised:2016-12-19 Online:2018-03-20 Published:2018-03-20

Abstract

Abstract: Based on MODIS NDVI and climate datasets during 2000-2014, used linear regression and correlation analysis, the spatiotemporal variations of NDVI in Gansu and their linkage with regional climate change were analyzed. The results showed that in the last 15 years, average NDVI of growing season, spring, summer and autumn all showed an increasing trend. The trend of summer was the most significant at regional scale, with a rate of 0.071/10 a (P<0.01). At pixel scale, the area of increasing trend in growing season was the largest, area with excellent (P<0.01) and significant (0.01 < P < 0.05) increasing trend covered 50.03% and 14.44% of the whole vegetation area respectively. Precipitation and humid index are the most important factors of vegetation growth in growing season and summer. Temperature, precipitation and humid index played equal roles in spring, temperature was the most important driving factor in autumn. The lag effect of temperature was obvious to NDVI in growing season. The precipitation and humid index in last season had effect on the vegetation growth of the coming season.

Key words: Gansu, NDVI, climate factor, correlation analysis

CLC Number:

Q948.2

Cao Bo, Zhang Bo, Ma Bin, Wang Guoqiang, Tang Min, Zhang Yaozong, Jia Yanqing. Spatial and Temporal Variations of NDVI in Gansu, China from 2000 to 2014[J]. JOURNAL OF DESERT RESEARCH, 2018, 38(2): 418-427.

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Spatial and Temporal Variations of NDVI in Gansu, China from 2000 to 2014

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