摘要
以1972,1989,2000,2011四个不同时段的遥感影像资料为基础,通过计算机自动提取结合人工解译获得研究区各时段冰川信息。参考世界冰川编目(WGI)分别对分布在中国、俄罗斯和哈萨克斯坦境内的冰川进行编目及属性更新,完成南阿尔泰山蒙古境内冰川编目。对不同时段冰川信息进行对比,并结合气温、降水等气候资料对其变化特征进行分析。结果表明:(1)1972-2011a,南阿尔泰山区冰川总面积从633.91km2减少至329.03km2,退缩面积304.88km2,占1972a冰川总面积的48.1%;(2)不同面积等级冰川数量与面积变化呈反相关关系,小冰川对气候的响应更为敏感;(3)研究区各坡向冰川均在退缩,其中南向、东北向、东向、北向退缩较快,西向、西南向、东南向、西北向相对缓慢;(4)1972-2008a研究区增温显著,降水以1987a为界先增后波动中稳定,二者的水热组合是区内冰川退缩的主要原因。
The glacier regions were extracted from remote sensing of 1972,1989,2000,2011a in southern Altai Mountains by using automatic extraction of computer and manual interpretation.Glacier properties were updated refer to World Glacier Inventory（WGI）,based on which we completed the part of glacier inventory in Mongolia,analyzed the glacier,temperature and precipitation information in different times.The results show that the glaciers in southern Altai decreased by 304.88 km2 or 48.1%（1.2%/a） from 1972 to 2011;Small-scale glaciers are more sensitive to the climate change;Glaciers on S,NE,E,N aspects retreated faster than those on the W,SW,SE,NW aspects;Analysis of monthly global gridded high resolution station data from University of Delaware indicates that air temperature in Southern Altai has increased significantly;The variation of precipitation showed a significant increase from 1972 to 1987,after which the precipitation fluctuations tended to be stable.Combination of water and heat in the study area is the main factor of the glacier retreating.
出处
《干旱区资源与环境》
CSSCI
CSCD
北大核心
2013年第2期77-82,共6页
Journal of Arid Land Resources and Environment
基金
国家自然科学基金(40871057)资助
