Analysis of vegetation changes and dominant factors on the Qinghai-Tibet Plateau, China  

作　　者：HongWei Wang Yuan Qi ChunLin Huang XiaoYing Li XiaoHong Deng JinLong Zhang 

机构地区：[1]Northwest Institute of Eco-environment and Resources, Chinese Academy of Sciences [2]University of Chinese Academy of Sciences

出　　处：《Research in Cold and Arid Regions》2019年第2期150-158,共9页寒旱区科学（英文版）

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences, China (Grant No. XDA20100101);the Foundation for Excellent Youth Scholars of Northwest Institute of Eco-environment and Resources, Chinese Acad emy of Sciences (Y651K91001)

摘　　要：This research was undertaken to clarify the characteristics of vegetation change and its main influencing factors on the Qinghai-Tibet Plateau. Using the greenness rate of change(GRC) and correlation factors, we analyzed the trend of vegetation change and its dominant factors from 2000 to 2015. The results indicate that the vegetation tended to improve from 2000 to 2015 on the Qinghai-Tibet Plateau, with the improved area accounting for 39.93% of the total; and the degraded area accounting for 19.32%. The areas of degraded vegetation are mainly concentrated in the low-relief and intermediate-relief mountains of the high-altitude and extremely high-altitude areas on the Qinghai-Tibet Plateau, as the vegetation characteristics are impacted by the terrain. Temperature and precipitation have obvious response mechanisms to vegetation growth, but the effects of precipitation and temperature on vegetation degradation are not significant over a short time frame. Overgrazing and population growth are the dominant factors of vegetation degradation on the Qinghai-Tibet Plateau.This research was undertaken to clarify the characteristics of vegetation change and its main influencing factors on the Qinghai-Tibet Plateau. Using the greenness rate of change(GRC) and correlation factors, we analyzed the trend of vegetation change and its dominant factors from 2000 to 2015. The results indicate that the vegetation tended to improve from 2000 to 2015 on the Qinghai-Tibet Plateau, with the improved area accounting for 39.93% of the total; and the degraded area accounting for 19.32%. The areas of degraded vegetation are mainly concentrated in the low-relief and intermediate-relief mountains of the high-altitude and extremely high-altitude areas on the Qinghai-Tibet Plateau, as the vegetation characteristics are impacted by the terrain. Temperature and precipitation have obvious response mechanisms to vegetation growth, but the effects of precipitation and temperature on vegetation degradation are not significant over a short time frame. Overgrazing and population growth are the dominant factors of vegetation degradation on the Qinghai-Tibet Plateau.

关 键 词：Qinghai-Tibet PLATEAU REMOTE sensing VEGETATION activity degraded DOMINANT FACTORS 

分 类 号：P[天文地球]