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地理研究  2013 

1973-2010年阿尔金山冰川变化

, PP. 1430-1438

Keywords: 阿尔金山,遥感监测,冰川退缩,气候变化,分形理论

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Abstract:

利用1973年MSS、1999年ETM+和2010年TM遥感影像资料,通过遥感图像处理和GIS技术,提取了阿尔金山地区三个时期的冰川信息,同时结合周边气象资料进行分析。结果表明①1973-2010年,研究区冰川面积从347.99km2减少到293.77km2,退缩了54.22km2,占1973年冰川总面积的15.58%,年均退缩速率为0.42%·a-1。近10年来冰川退缩尤为剧烈,年均退缩速率达到0.58%·a-1;②研究区东段冰川退缩速率快于中段和西段;③冰川规模越小,退缩越明显;④研究区东坡冰川的面积退缩率最大,北坡次之,东南坡最小;⑤气温升高和降水在波动中变化不大是造成研究区冰川退缩的主要原因;⑥通过分形理论对研究区冰川空间结构特征进行分析,预计研究区冰川今后的消融速率仍将处于较高状态。

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