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《Acta Scientiarum Naturalium Universitatis Pekinensis》 2007-06
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Responses of Vegetation Activity to Precipitation Variation on the Tibetan Plateau

ZHOU Rui 1)YANG Yuanhe FANG Jingyun(Department of Ecology,College of Urban and Environmental Sciences,and Key Laboratory for Earth Surface Processes of the Ministry of Education,Peking University,Beijing,100871  
To reveal the effects of climate change on the Tibetan Plateau,the Enhanced Vegetation Index(EVI)data of 2000-2004 together with the climate data from meteorological stations in the study area is used to analyze the vegetation cover,variations and the relationships between climate factors.The primary results show as follows:(1)EVI decreases from southeast to northwest on the Tibetan Plateau,which resulted from the precipitation;(2)Vegetation growth keeps stable on the whole,with obvious variation in some areas;(3)EVI variations mainly come from precipitation variation.Coefficient of Variation(CV)of EVI shows significantly positive relation to precipitation CV,but has no relation in evidence to temperature CV;(4)EVI CV shows significant negative relation to precipitation,which means vegetation growth in areas with more precipitation varies less strongly.
【Fund】: 国家自然科学基金(40024101 40152003)资助项目
【CateGory Index】: Q948
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