Temporal and Spatial Evolution of Vegetation Cover and Its Relationship With Climate Factors in Shaanxi Province

doi:10.3969/j.issn.1000-6362.2015.01.014

Abstract

Abstract: Based on SPOT VGT NDVI data during 2000-2012，temporal and spatial evolution of vegetation cover and its relationship with climate factors in Shaanxi province were analyzed by using difference and correlation analysis method.The results showed that the vegetation improvement area were significant greater than the degradation area，the increased area of vegetation coverage was mainly distributed in sandstorm transition region and the Loess Plateau in Shaanxi province.The decreased area was mainly distributed in Guanzhong Plain region and parts of southern Shaanxi province.There was significant relationship between monthly average NDVI and monthly average precipitation and temperature（P<0.01），with the correlation coefficients 0.875 and 0.885.The NDVI growth rate in Shaanxi province was 0.109·10y-1，which indicated that the ecological restoration of vegetation construction made progress.In addition，the NDVI showed obvious seasonal variation.The NDVI developed faster in summer and autumn than that in winter，but the responses of vegetation variation to precipitation and temperature had time lag．

Key words: Shaanxi province, Normalized difference vegetation index （NDVI）, Temporal and spatial evolution, Climate factor, Time lag

QIN Chao，LI Jun yi，CHEN Hong fei，BAO Jun wei，SONG Guang fei. Temporal and Spatial Evolution of Vegetation Cover and Its Relationship With Climate Factors in Shaanxi Province[J]. Chinese Journal of Agrometeorology, 2015, 36(01): 108-114.

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