近30年阿尼玛卿山冰川与气候变化关系研究

Research for Glaciers and Climate Change of A'nyêMaqên Mountain Nearly 30 Years

以阿尼玛卿山的冰川为研究对象,选取1992年、2001年、2010年3个时段的TM、ETM+影像,利用RS,GIS技术提取了阿尼玛卿山冰川边界,并结合距研究区较近的3个气象站点1960—2010年年降水量、年平均气温数据,对近20a阿尼玛卿山地区冰川与气候变化关系进行了研究。结果表明:近20a来,阿尼玛卿山冰川既有退缩也有前进,但整体呈退缩趋势。1992—2010年冰川面积从109.21km2减少到99.34km2,退缩了9.04%;1992—2001年年均退缩速率为0.71km2/a,而2001—2010年年均退缩速率为0.38km2/a,表明近10a退缩速率减慢。气象数据表明,气温大幅度上升,降水量小幅度增加。温度升高是阿尼玛卿山冰川退缩的主要原因。

In order to analyze used to extract the boundary and used. Combining mean a three meteorological stations glacier and climate change o Mountain glacier cover was a of retreat over the past 20 years. Glacier cover reduced from 109.21 km2 to 99.34 km2 during the period from 1992 to 2010 by 9.04O/oo at a rate of 0.71 km2 per year. During 2001 2010 glacier cover had a retreat rate of 0.38 km2 per year, which indicated that the glacier retreat rate decreased. Meteorological data shows that there is an obvious increase of temperature, but the precipitation slightly increase, revealing that temperature increase is the vital cause of glacier retreat in Anye Maen Mountain.