【摘要】 植被动态监测以及植被与气候因子的响应关系是陆地生态系统研究的热点。利用渭南市2000—2015年MODIS植被指数数据集以及相关气象资料,采用Man-Kendell检验、趋势分析和相关分析等方法,揭示渭南市植被覆盖度时空动态特征及其与气候因子的相关性。结果表明:（1）渭南市植被覆盖度在2000—2015年间呈显著上升趋势(0.007a^–1)。（2）渭南市植被覆盖度在空间上表现为由南向北逐渐减小的趋势。（3）渭南市植被覆盖度以中覆盖度为主,2000、2005、2010和2015年所占比重分别为71.31%、68.54%、73.02%和53.07%。（4）年尺度上,渭南市植被覆盖度与降雨量和气温表现为不显著正相关。月尺度上,渭南市植被覆盖度与降雨量和气温相关系数较高。相对于温度,渭南市植被覆盖度对降水量的响应更为敏感,为水分限制型生态区。更多还原

【Abstract】 Vegetation dynamic monitoring and the relationship between vegetation and climate change are the hotspots of terrestrial ecosystem research. Based on the MODIS vegetation index data set and related meteorological data from 2000 to 2015 in Weinan City, Mann-Kendell test, trend analysis and correlation analysis were used to reveal the temporal and spatial dynamic characteristics of vegetation coverage and its correlation with climate factors. The results showed that:（1） Vegetation coverage in Weinan City showed a significant upward trend(0.007 a^-1) from 2000 to 2015.（2） The vegetation coverage in Weinan City showed a trend of decreasing from south to north.（3） Vegetation coverage in Weinan City was dominated by medium coverage, accounting for 71.31%, 68.54%, 73.02% and 53.07% in 2000, 2005, 2010 and 2015, respectively.（4） On the annual scale, the vegetation coverage was not significantly positively correlated with rainfall and temperature. On the monthly scale, the correlation coefficient between vegetation coverage and rainfall and temperature in the study area was higher. Compared with the temperature, the vegetation coverage of Weinan City was more sensitive to the precipitation, and it was a water-restricted ecological zone.更多还原