摘要
通过对20世纪80年代,90年代,2000年3个时期遥感图像解译,分析了毛乌素沙地沙漠化过程及其驱动机制,认为毛乌素沙地近20 a来沙漠化程度有所减轻,植被覆盖有所增加。气候因素和人为因素是导致植被覆盖增加的决定因素,近20 a中该区年际气候变化表现为增温和降水波动,通过多元回归分析确定降水和气温是影响毛乌素沙地植被变化的关键气候因子,气温升高是促使本研究区植被覆盖增加的主要气候因素,气温升高引起的生长季节的延长和生长加速是研究区NDVI增加的主要原因,即气候变暖促进了该区植被覆盖增加。人为因素的影响表现在20 a来农田和林地的大面积增加。
The remote sensing images in 1980s, 1990s and 2000s were interpreted to disclose the desertification process of Mu Us Sandland, and to discuss its driving mechanism. The degree of desertification in Mu Us Sandland decreased in the past 20 years, and the cover of vegetation increased correspondingly. Meteorology factor and anthropogenic factor account for these change in Mu Us Sandland. Increased temperature is the key factor in the increase of vegetation cover, and the effect of anthropogenic factor is manifested by the great increase of farmland and woodland.
出处
《中国沙漠》
CSCD
北大核心
2009年第5期796-801,共6页
Journal of Desert Research
基金
国家自然科学基金项目(30700107)
中加国际科技合作项目(2009DFA91900)资助
关键词
沙漠化
遥感
毛乌素沙地
气候变化
desertification
remote sensing
Mu Us Sandland
climate change
