论文部分内容阅读
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。
The limits of the glacier in Bukagtag Mountain, located in the middle of the Kunlun Mountains from 1973 to 2010, were extracted by remote sensing image processing and visual interpretation. The change of glacier area in the past 37 years was analyzed by GIS and its response to climate change was systematically studied. The results show that the performance of BukTags peak ice caps in 1973-2010 first expanded (from 1976 to 2010), and the total area shrank by 5.42% and shrank 0.14% each year. Based on the analysis of the climatic characteristics of the study area from 1960 to 2010, it is found that the key factor in the retreat of the ice cap in Buktagami is the warming of the climate. The increase of annual precipitation can not offset the glacier ablation rate caused by the dramatic temperature rise in summer. Conditions, geographical location and glacier size are all important factors affecting glacier fluctuations.