小冰期以来羌塘高原中西部冰川变化图谱分析

Tupu Analysis of the Spatio-Temporal Glacier Variations in the Central and Western Qangtang Plateau since the Little Ice Age

运用地理信息图谱理论与方法,以地形图、航空相片、Landsat TM和ETM+遥感数据为基础数据源,分析了羌塘高原中西部小冰期至2000年代的冰川变化.结果表明:这里虽仍有部分冰川存在前进,但冰川整体呈萎缩状态,而且近几十年来,冰川退缩加剧.与同一区域的普若岗日相比,研究区冰川更为稳定.与其它山区冰川相比,这里由于是极大陆型冰川区,所以冰川较其它山区冰川相对稳定.气温升高和降水减少是该区冰川退缩的主要原因.

Global warming has a great impact on the glacier variations and becomes the focus of many scientific researches.The glaciers are more sensitive in the Qinghai Plateau than those at the poles,so it is of significance to research glaciers in the Qangtang Plateau,hinterland of the Tibetan Plateau.Under the influence of the special climate,topography and terrain in the Qangtang Plateau,glaciers center on the mountainous regions,and the main types of glaciers are star and maculosus ice caps or flat-topped.The sn...