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《Acta Agrestia Sinica》 2017-04
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Spatial and Temporal Variation of NDVI in Different Functional Areas of Qinghai from 2000 to 2015

LI Fan;XU Wei-xin;Institute of Qinghai Meteorological Science Research;  
To understand the spatial and temporal changes in functional areas of Qinghai,Normalized Difference Vegetation Index(NDVI)time series data from 2000 to 2015 were collected based on MOD13 Q1 product.The coefficient of variation and trend analysis were combined to investigate the volatility and trend characteristic of vegetation.The results showed that vegetation NDVI was higher in southeast than that in northwest,and decreased from southeast to northwest and from east to west.NDVI frequency showed a M-type bimodal distribution in Three-river Source region,and the lowest unimodal distribution was appeared in Qaidam Basin.Lake area and east agriculture area showed similar unimodal distribution.As for CV,higher volatility distributed in lake area and east agriculture area,and lower volatility distributed in the edge of qaidam basin and the south of lake area.In terms of trend analysis,vegetation NDVI showed a fluctuating increase trend with 0.012·10 a-1 in Qinghai and a significant increase in Qaidam Basin and east agriculture area.This study revealed the effect of climate change and human activities on the trends of vegetation NDVI in functional areas,Qinghai,which provided a base data and scientific proof for ecology protection.
【Fund】: 国家自然基金项目(31560671);; 青海省科技厅重大专项项目(2015-SF-A4-2);青海省科技厅重点研发与转化计划(2016-HZ-807)资助
【CateGory Index】: Q948
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