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利用1972年MSS,1990、1999年TM和2013年ETM+遥感影像资料作为数据源,通过目视解译结合GIS技术,提取博格达峰地区4期冰川边界,同时对研究区周边气温降水进行趋势分析和周期分析,研究其与冰川的响应关系。结果表明:1 1972~2013年冰川面积退缩了23.79%(占1972年),退缩速率为0.58%/a。1972~1990年冰川退缩较慢,为0.38%/a,近20 a来冰川退缩加剧,达到0.74%/a;2冰川规模越小,退缩越快;3东南坡退缩最快,东坡次之,北坡最慢;4冰川退缩比率随坡度的变化呈正态分布;5研究区处于气温偏高期,降水偏少期,气候变暖是冰川退缩的主要原因;6对比发现该地区与天山其他区域冰川退缩速率相吻合。
By using the data of MSS in1990, TM in1990 and 1999 and the ETM + remote sensing data in 2013 as the data source, the glacier boundary of No.4 in Bogda Peak Region was extracted by visual interpretation combined with GIS technology and the trend of temperature and precipitation around the study area Analysis and cycle analysis to study its response to the glacier. The results show that: 1 From 1972 to 2013, the glacier area retreated by 23.79% (accounting for 1972) and the retreat rate was 0.58% / a. The glacier retreated slowly from 1972 to 1990, 0.38% / a, and the retreat of the glacier increased to 0.74% / a in the past 20 years; 2 The smaller the glacier, the faster the retreat; 3 The southeast slope retreated fastest and the east slope followed And the slowest on the northern slope. 4 The retreat ratio of glaciers showed a normal distribution with the change of slope degree. 5 The study area was in the period of high temperature and less precipitation, and the warming was the main reason of glacier retreat. The glacier retreat rates in other areas are consistent.