青藏高原各拉丹冬地区冰川变化的遥感监测  

Glacier Change in the Geladandong Area of the Tibetan Plateau Monitored by Remote Sensing

作　　者：鲁安新[1] 姚檀栋[1] 刘时银[1] 丁良福[1] 李刚[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所冰芯与寒区环境重点实验室,甘肃兰州730000

出　　处：《冰川冻土》2002年第5期559-562,共4页Journal of Glaciology and Geocryology

基　　金：中国科学院知识创新工程项目 (KZCX2 3 0 1);国家重点基础研究发展规划项目 (G19980 40 812 );中国科学院知识创新工程重大项目 (KZCX1 10 0 6)资助

摘　　要：以位于青藏高原长江源头的各拉丹冬地区冰川为例 ,利用 2 0 0 0年的TM数字遥感影像资料、196 9年的航空相片遥感资料、地形图及数字地形模型 ,通过遥感图像处理和分析提取研究区小冰期最盛期 (LIA)、196 9年和 2 0 0 0年的冰川范围 ,并在地理信息系统技术支持下分析该地区冰川的进退情况 .研究结果表明 ,该地区 196 9年冰川面积比小冰期最盛期的冰川面积减少了 5 2 % ,2 0 0 0年的冰川面积比 196 9年的冰川面积减少了 1.7% .从 196 9年到 2 0 0 0年最大冰川退缩速度为 - 4 1.5m·a-1,最大冰川前进速度为 +2 1.9m·a-1.本区的冰川基本处于稳定状态 ,冰川退缩的速度不是太大 ,并有前进的冰川存在 .Glaciers on the Tibetan Plateau play an important role in the earths climatic system. Regular survey of glacier change is almost impossible in most parts of the plateau. Remote sensing is a primary technique and becomes the only means in many places. GIS provides an efficient tool to analyze the status and the change of glaciers. In the paper, the Geladandong area, the headwaters of the Yangtze River, was selected as the test area. Glacier variation during the Little Ice Age (LIA) maximum, in 1969 and 2000 were analyzed by means of aerial photos, satellite image, topographical map and the derived digital elevation model (DEM). The results indicate that the glacier area had decreased about 5\^2% from the Little Ice Age Maximum to 1969 and had decreased about 1.7% from 1969 to 2000. However, the glaciers seem almost steady in the test area in consideration of glacier number only.

关 键 词：各拉丹冬地区 青藏高原 冰川变化 遥感 地理信息系统 数据 图像处理 

分 类 号：P343.6[天文地球—水文科学] TP79[天文地球—地球物理学]