【摘要】 基于MODIS归一化植被指数(NDVI)产品数据,通过像元二分模型估算了蒙古国2003-2017年植被覆盖度,进行荒漠化监测。结果表明,蒙古国是一个受荒漠化危害极为严重的国家,极重度、重度荒漠化土地占国土面积的50.70%;2003-2017年,极重度和重度荒漠化所占国土总面积的比例从前期的55.99%减少到后期的50.70%,而轻度和非荒漠化土地所占面积比例从前期的26.11%增加到28.13%。土地利用转移矩阵显示,2003-2017年研究区极重度荒漠化和重度荒漠化转出面积均>转入的面积,呈减少趋势。而非荒漠化和轻度荒漠化转入面积要>转出面积,呈增加趋势。近15年蒙古国生态环境整体趋于改善,荒漠化的发展态势不明显。更多还原

【Abstract】 Based on MODIS NDVI data,the vegetation coverage in Mongolia from 2003 to 2017 was estimated by the pixel binary model.Mongolia is a country that is seriously endangered by desertification.Extremely severe and severe desertification land accounted for 50.70% of the total land area.The percentage of extremely severe and severe desertification land decreased from 55.99% in 2003 to 50.70% in 2017.In the same period,the percentage of light and non desertification land increased from 26.16% to 28.13%.The land use transfer matrix showed that the area of extremely severe desertification and severe desertification was larger than the area transferred in 2003-2017,showing a decreasing trend.The area of desertification and light desertification was greater than the area transferred out,showing an increasing trend.There was no significant desertification development in Mongolia during the past 15 years.更多还原