【摘要】 为探究长三角地区植被变化及其对气候因子的响应，以归一化植被指数（NDVI）作为植被生长评估指标，基于Google Earth Engine获取的MODIS NDVI数据及同期气象数据，采用趋势分析和相关性分析等方法研究了2000—2015年长三角流域植被时空演化及其对气候因子的响应关系。结果表明：（1）2000—2015年长三角地区NDVI均值以0.0014 a^-1的速率波动上升，研究区内植被NDVI整体上呈上升趋势，增加的面积占比70.53%，减少的面积占比为29.47%；从空间上来看，植被增加区域主要集中在南部山区，即大别山区与黄山地区。（2）Hurst指数介于0.141-0.982，总体上大部分地区呈高值分布，低值主要分布在研究区东部，即上海地区及江苏东部地区，研究区内持续倾向面积超过总面积1/2。（3）长三角地区年均气温在空间上呈现中部向南部逐渐升高的趋势，降水量空间差异明显，南部降水量较大，北部降水量较小。（4）长三角地区NDVI与气温、降水的偏相关系数分别为0.581和0.595，显示降水对植被的影响略高于气温，均对长三角地区植被生长起到正向作用。更多还原

【Abstract】 In order to explore the vegetation change and its response to the hydrothermal environment in the Yangtze River Delta,the normalized difference vegetation index（ NDVI）was used as the vegetation growth evaluation index in this paper. Based on the MODIS NDVI data obtained by Google Earth Engine and the meteorological data of the same period,the temporal and spatial evolution of vegetation and its response to climate factors in the Yangtze River Delta from 2000 to 2015 were studied by trend analysis and correlation analysis. The results showed that :（ 1）From 2000 to 2015,the mean NDVI in the Yangtze River Delta fluctuated at a rate of 0.0014 a^-1,and the NDVI in the study area showed an overall upward trend,with an increase of 70.53 % and a decrease of29.47 %;from the spatial point of view,the vegetation increase area is mainly concentrated in the southern mountainous area,namely Dabie Mountain and Huangshan area;（ 2）Hurst index is 0.141-0.982,and most regions show high value distribution in general. The low value is mainly distributed in the eastern part of the study area,namely,Shanghai and eastern Jiangsu,and the area of persistent tendency in the study area exceeds 1/2 of the total area.（ 3）The average annual temperature in the Yangtze River Delta showed a trend of gradual increase from the middle to the south,and the spatial difference of precipitation was obvious. The precipitation in the south was large,and that in the north was small.（ 4）The partial correlation coefficients of NDVI with temperature and precipitation in the Yangtze River Delta were 0.581 and 0.595,respectively,which showed that the influence of precipitation on vegetation was slightly higher than that of temperature,and both had positive effects on vegetation growth in the Yangtze River Delta.更多还原