1970-2000年念青唐古拉山脉西段冰川变化  

Variation of Glaciers in the Western Nyainqêntanglha Range of Tibetan Plateau during 1970-2000

作　　者：上官冬辉[1] 刘时银[1] 丁良福[1] 张世强[1] 李刚[1] 张勇[1] 李晶[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰冻圈科学国家重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2008年第2期204-210,共7页Journal of Glaciology and Geocryology

基　　金：国家重点基础研究发展计划(973计划)项目(2007CB411506);科技部基础支撑项目(2006FY110200);中国科学院知识创新工程重大项目(KZCX2-YW-301)资助

摘　　要：运用多光谱遥感资料监测冰川变化已成为冰川研究的有效数据源，分析了念青唐古拉山脉西段念青唐古拉山峰区1970年冰川及Landsat ETM＋（2000）解译的冰川分布．结果显示，念青唐古拉山峰区共有870条冰川，30a来冰川面积减小了5.7％，冰储量减少了7％；其中，冰川面积1～5km^2的冰川退缩的贡献最大，占总面积退缩量的56．7％．念青唐古拉山东南坡与西北坡的退缩幅度稍有不同，东南坡冰川面积减少了5．2％。西北坡冰川面积减少了6．9％．西北坡的拉弄冰川长度减少了（305±36）m，年退缩率为（10．2±1．2）m·a^-1，面积退缩为2．6％．当雄气象站的资料表明，冰川退缩主要受温度持续上升的影响，尤其是1985年以来的温度快速上升的影响．对处于西北坡冰川体积变化分析表明，冰川体积减少可能是导致纳木错湖水位上升、水量增加的重要因素．To monitor the glacier change by means of multi--spectrum remote sensing images provides a valid data bank. The Land ETM＋ image was used to map the glacier distribution in 2000 by vision interpretation. Comparison of the glacier distribution maps from Glacier Inventory of China （1970） with those from Landsat ETM＋（2000） reveals that the area and volume of 870 glaciers in the Nyainqentanglha Range has decreased 5.7 and 7%, respectively, in the recent 30 years; A- mong them, glaciers in the area rank of 1～ 5 km^2 contribute to 56.7% （19.5 km^2） of the total area loss. However, there is some difference between the southeast slopes and the northwest slopes of Nyainqentanglha Range. In the former glacier area reduced 5.2% and in the latter glacier area reduced 6.9 M. The Lanong Glacier in the northwest slope of Nyainqentanglha Range has retreated （305±36）m, with a retreat rate of （10.2±1.2）m·a^-1and an area shrinkage ratio of 2.6%. The records in Damxung Meteorological Station indicate that the glacier shrinkage was mainly subjected to continuous temperature rise, especially after 1985. In addition, decrease of glacier volume （1.115 km^3） in the northwest slopes of Nyainqentanglha Range results in the lake-level rising and water storage increasing （0. 765 km^3） of the Nam Lake.

关 键 词：念青唐古拉山 冰川变化 LANDSAT 纳木错湖 

分 类 号：P343.6[天文地球—水文科学]