Vegetation Change and Its Response to Climate Change in Turpan
Based on the annual maximum Normalized Difference Vegetation Index data of Landsat satellite and the average temperature,extreme maximum temperature,and precipitation data of Turpan in summer from 2000 to 2018,the correlations between vegetation coverage and meteorological factors such as temperature and precipitation were analyzed by statistics methods,such as trend analysis,moving average and linear regression analysis.The results showed that the spatial distribution of vegetation was significant regional in Turpan,with the highest vegetation in the northern mountainous area,followed by plain oasis area,and the least vegetation in the southern and eastern regions of Turpan.The annual maximum vegetation coverage increased at a modest 0.015％·(10a)-1rate from 2020 to 2018,and the vegetation coverage in the southern of Turpan had little change,while the vegetation coverage in the western mountainous area and around the towns increased significantly.There was a indistinctively positive correlation between vegetation coverage and summer mean temperature,and a significant positive correlation between vegetation coverage and summer precipitation.At the same time,vegetation coverage was negatively correlated with annual maximum temperature.The influence of precipitation on vegetation coverage was greater than that of temperature,and the climate warming and humidification had limited impact on ecological environment in small district.The vegetation coverage of areas around towns and villages mainly under artificial irrigation had increased significantly.The policy of returning farmland to forest and grassland has made some effect in Turpan.
万方数据
维普
