念青唐古拉山西段近40年冰川与气候变化研究  

Relation between glacier retreat and climate change in the western Nyainqentanglha in the past 40 years

作　　者：冀琴[1] 杨太保[1] 田洪阵[1] 何毅[1] 李霞[1] 

机构地区：[1]兰州大学资源环境学院、冰川与生态地理研究所,兰州730000

出　　处：《干旱区资源与环境》2014年第7期12-17,共6页Journal of Arid Land Resources and Environment

基　　金：国家自然科学基金项目(41271024)资助

摘　　要：采用1976、1991、2000和2011年Landsat MSS/TM/ETM+影像,以计算机辅助分类和目视解译方法提取的念青唐古拉山西段冰川边界为对比依据,研究了近40a的冰川进退变化。结果表明:近40a念青唐古拉山西段冰川总体处于持续退缩状态,1976-2011年间冰川总面积减少193.9km2,且退缩速率呈现大-小-大的变化特征。研究时段内各坡向冰川退缩幅度不同,东南坡减少14.2%,西北坡减少23%;结合当雄、那曲、班戈和申扎气象站的数据认为,气温升高是冰川退缩的主要原因,三个时段冰川退缩速率的差异主要是各时段升温幅度不同所致;分析了位于研究区东南坡和西北坡当雄、班戈气象站的数据表明,地理位置影响气候变化,同时影响冰川进退。The remote sensing was used to delineate the glacier in the western Nyainqentanglha. The results showed the glacier area decreased by 193.84kin2 from 1976 to 2011. It experienced a large - small - lager retreat parterre. The relative change rate in the SE was less than in the NW. The records of the four meteorological stations showed a pronounced temperature increasing, which was the main reason caused the retreat of the glaciers. The glacier retreat pattern was a product of temperature variations in different periods. The records of Damxung and Bangor meteorological stations showed the location had an important effect on the glacier retreat.

关 键 词：冰川退缩 遥感 气候变化 念青唐古拉山西段 

分 类 号：P343.6[天文地球—水文科学]