【摘要】 利用长时间序列的MODIS遥感影像和气象数据，应用归一化植被覆盖度指数(NDVI)、趋势分析、Mann-Kendall统计检验法、相关分析等方法，分析了2000-2020年浑善达克沙地植被覆盖的时空分布和变化趋势，探讨了区域植被覆盖度与气候的关系，解释了可能导致植被覆盖度变化的原因。结果表明：(1)2000-2020年浑沙达克沙地植被覆盖情况整体良好，在空间上，植被覆盖度由西至东逐渐递增，在时间变化上，植被覆盖度逐年递增且稳定性高；(2)植被覆盖度随高程、降水量、蒸散量的增加而逐渐升高，呈正相关；随温度的升高而逐渐降低，呈负相关；(3)研究时段内，各土地利用类型面积变化不大，不同类型土地上的植被覆盖度差异较大，不同土地利用类型之间的相互转化可使植被覆盖度变高。更多还原

【Abstract】 The spatial and temporal distribution and change trends of vegetation cover in the Hunsandak Sandy Land from 2000 to 2020 were analyzed by using long time series of MODIS remote sensing images and meteorological data, and applying the methods of NDVI, trend analysis, Mann-Kendall statistical test and correlation analysis, to explore the relationship between vegetation cover and climate in the region. The relationship between regional vegetation cover and climate is analyzed, and the reasons that may lead to the change of vegetation cover are explained. The results show that:(1)the vegetation cover of Hunsadak Sandy Land is good in general from 2000 to 2020, and the vegetation cover gradually increases from west to east in space, and increases year by year with high stability in time;(2)vegetation cover gradually increases with elevation, precipitation and evapotranspiration, forming a positive correlation, and gradually decreases with temperature, forming a negative correlation;(3)during the study period, the area of each land use type does not change much. The vegetation cover on different types of land varies greatly, and the mutual transformation between different land use types can make the vegetation cover higher.更多还原