摘要
通过遥感图像处理技术和目视解译方法提取1973-2010年位于昆仑山中段的布喀塔格峰冰川界限,用GIS分析近37a冰川面积变化,并系统地研究其对气候变化的响应情况。结果表明:1973-2010年布喀塔格峰冰帽表现先扩大(1973-1976年)后退缩(1976-2010年)趋势,总面积缩小了5.42%,每年退缩0.14%。分析1960-2010年研究区的气候变化特征,发现布喀塔格峰冰帽退缩的关键因素是气候变暖,年降水量的增加不能够抵消由夏季温度剧烈上升导致的冰川消融率,并且地形条件、地理位置以及冰川规模都是影响冰川波动的重要因素。
In this study,we use Landsat data（1973～2010 serial RBV,MSS,TM,and ETM＋） to map the glacier extents by applying remote sensing（RS） and visual interpretation.After constructing glacier maps,we obtained the details of glaciers changes of Bukatage Ice Caps,located at the central part of the Kunlun Mountains during the last 37 years by using GIS tools,and the response of glacier area variation to climate change was discussed systematically.The result show that the Bukatage Ice Caps have experienced a general shrinkage（1976-2010） after slight rise（1973-1976）,the total glacier area decreased by 5.42% from 1973 to 2010.By analyzing the climatic changes（annual mean temperature,summer mean temperature and annual precipitation） and glacial variation in the research area it is shown that glacier changes in the region is contributed to the impacts of global warming.Annual precipitation also showed an upward trend,but this could not compensate for the mass loss due to ablation.Besides,topographic condition、geographic position and the scale of glacier are key factors for glacier changes.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2013年第3期47-52,共6页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金项目(40871057)资助
关键词
布喀塔格峰
冰川波动
气候变化
冰川面积
Bukatage Ice Caps
glacier variation
climate change
glacier area
