1975-2014年锡林郭勒盟沙漠化时空演变分析  

Spatial-temporal evolution of desertification in Xilinguole League during 1975-2014

作　　者：丁文广[1] 赵晨[1] 陈利珍[1] 李丹璐 

机构地区：[1]兰州大学资源环境学院,兰州730000

出　　处：《兰州大学学报（自然科学版）》2017年第1期60-67,共8页Journal of Lanzhou University(Natural Sciences)

基　　金：国家科技支撑计划项目(2012BAC19B09)

摘　　要：选取锡林郭勒盟1975-2014年的Landsat卫星影像,分析了1975年以来锡林郭勒盟沙漠化土地动态变化特征.结果表明:锡林郭勒盟沙漠化从东向西逐渐由非沙漠化过渡到重度沙漠化,沙漠化总面积先增后减,2005年达到最大值;1985年以前沙漠化整体变化较小,1985年以后沙漠化变化较为剧烈,地域间变化不同,且轻度沙漠化的增减直接影响了沙漠化总面积的变化;重、中、轻3种程度的沙漠化重心从西南向东北依次排列,沙漠化重心在2005年以前持续向东迁移,之后向西有所折返.The dynamic changing features of Xilinguole League desertified land were analyzed by selecting the Landsat satellite images of 1975-2014.The results showed that the desertification of Xilinguole League underwent a gradual transition from non-to severe desertification from east to west,the total desertification area increased first and decreased later,and reached the maximum in 2005.The changes in desertification occurred basically according to the contemporaneous climate changes.The overall changes in desertification were small before 1985 and dramatic changes occurred after 1985 with different situations from region to region,the increase and decrease of the light desertified land area had direct impact on the changes in the total area of desertification.The centroids of the three degrees,i.e.heavy,moderate and light,of desertified lands were in the order from southwest to northeast.The centroid of desertification had a sustained movement to the east before 2005 and then moved westward.

关 键 词：沙漠化 转移矩阵 重心迁移 锡林郭勒盟 

分 类 号：P951[天文地球—自然地理学]