【摘要】 运用Landsat TM/ETM+遥感影像资料,通过计算机自动解译结合目视解译的方法,提取了阿拉套山1990年、1999年及2011年3个时段的冰川边界,并应用GIS技术手段系统研究了阿拉套山冰川变化与气候的关系。结果表明:1990—2011年,阿拉套山地区冰川面积退缩了20.24%,其冰川主要分布在北坡、东北坡和西北坡;西坡的冰川退缩速率最大,达到30.96%。与1990—1999年相比,近10a来冰川退缩加快。研究区冰川面积随海拔的升高先呈增加趋势,至3 600~3 800m达到最大后呈减少趋势。对研究区附近温泉和阿拉山气象站点资料的分析表明,其气温升高但降水量变化不大可能是导致研究区冰川退缩的主要原因。更多还原

【Abstract】 The Alatau Mountain was selected as a example to search a method for delineating glacier extent by Landsat TM,ETM+image of 1990,1999and 2011.The study area for glaciers was extracted by using the remote sensing image processing and analyzing method,and the changes of glaciers in the study area were analyzed with the support of the GIS technology.The results indicated that the amplitude of the whole change of glaciers in Alatau Mountain was large and glaciers had retreated rapidly during the study period 1990to2011.The total area for the investigated glaciers had reduced by 20.24%.The glaciers were mainly distributed in the northern slope,northeast slope and northwestern slope,but retreat rate of western slope reached to 30.96%.Compared with the period of 1990—1999,the retreat rate of glaciers would speed up in the past10years.The glacier area distribution of study area first tended to increased with altitude,up to 3 600m~3 800mafter decreasing trend.By studying the hot springs and the Alaskan mountain meteorological stations,little precipitation change and its temperature rises may be the main reasons for glacier retreat in the study area.更多还原