哈密市植被变化及其对气候变化的响应

以2000-2016年(5-10月)MOD13QI数据为基础,并结合同期气温和降水资料,采用线性趋势分析?相关分析等方法,研究了哈密市近16年来植被空间变化特征以及与气候因素的关系?结果表明:哈密市NDVI总体上呈上升的趋势,主要植被类型为低覆盖度植被类型?2000-2008?2008-2016年两个时期,哈密市极低覆盖度?极高覆盖度植被都先下降后上升,低覆盖度和高覆盖度植被持续上升,中等覆盖度植被持续下降?NDVI与气温?降水都存在一定的相关性,NDVI受气温的影响较少,受降水量的影响较显著（P<0.01）?

Vegetation Change and its Response to Climate Change in Hami City

Based on the MOD13QI data of 2000-2016 years (5-10 months), combined with the data of temperature and precipitation at the same time, the linear trend analysis and correlation analysis were used to study the spatial change characteristics of vegetation in the last 16 years in Hami and the relationship with the climatic factors. The results show that:NDVI in Hami city showed an overall upward trend, and the main vegetation types were low coverage vegetation types. During the periods of 2000 - 2008 and 2008 - 2016, the vegetation with extremely low coverage and extremely high coverage decreased first and then increased, while the vegetation with low coverage and high coverage continued to increase, while the vegetation with medium coverage continued to decrease. NDVI has a certain correlation with temperature and precipitation, and NDVI is less affected by the temperature, and is significantly affected by the precipitation.