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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.
Based on the topographic maps, aerial photographs, remote sensing data of Landsat TM and ETM +, the change of glaciers in the central and western Qiangtang Plateau during the Little Ice Age and the 2000s was analyzed by using the theory and method of geographic information graph (GIS). The results show that there are still some parts Glaciers exist, but the whole glacier shrinks, and the retreat of glaciers has intensified in recent decades.Compared with Puruogangri in the same area, the glaciers in the study area are more stable than in other mountain glaciers, Continental glacier area, so the glacier is relatively stable than other mountain glaciers.The temperature rise and precipitation reduction are the main reasons for glacier retreat in this area.