多源DEM和多时相遥感影像监测冰川体积变化——以青藏高原那木纳尼峰地区为例  

Monitoring Glacier Volume Change Based on Multi-Source DEM and Multi-Temporal Remote Sensing Images——a Case Study in the Mount Naimona'nyi Region on the Tibetan Plateau

作　　者：王祎婷[1] 陈秀万[1] 柏延臣[2] 黎新亮 

机构地区：[1]北京大学遥感与地理信息系统研究所,北京100871 [2]北京师范大学地理学与遥感科学学院,北京100875 [3]Faculty of Earth Sciences,Utrecht University

出　　处：《冰川冻土》2010年第1期126-132,共7页Journal of Glaciology and Geocryology

基　　金：科技部国家科技支撑计划项目(2007BAH12B05);欧盟第七框架研究计划(FP7)项目"Coordinated Asia-European long-term Observing system of Qinghai-Tibet Plateau hydro-meteorological processes and Asian-monsoon system with Ground satellite Image data and numerical imuliations(CEOP-AGEIS)"资助

摘　　要：冰川储量变化对全球水循环、能量平衡和区域水资源都具有重要意义,构成全球变化研究的重要方面.针对当前冰川变化监测技术与方法,提出一种结合多源DEM数据和多时相遥感影像监测冰川体积变化的方法.以青藏高原那木纳尼峰地区冰川为例,通过MSS/TM遥感数据识别冰川范围,以地形图DEM和SRTM-DEM计算出两时期冰川厚度变化信息,从而计算冰川体积变化值.计算过程中,对冰川范围识别、遥感数据不同时相、不同源DEM数据的误差进行了分析和控制.结果显示,1976—2001年的25a间该地区冰川体积减少了3.060km3,存在着较为强烈的消耗,冰川年损耗速率为0.1224km3.a-1.For the significance of glaciers in glo.bal hydro cycle and energy balance, glacier change has become a hot subject in global change studies. The development of remote sensing can help to acquire a large amount of land cover information while the advent of high precise DEM data makes it possible to get three-dimensional information of land objects. Based on current glacier change monitoring methods, this paper proposes a way to combine multisource DEM data and multi temporal remote sensing data to estimate glacier volume change. The Mount Naimona＇nyi region on the Tibetan Plateau is taken as a study case. Firstly all data are transformed into UTM projection and WGS-84 daturn. Especially SRTM-DEM is corrected from EGM-96 elevation system to 1985-Huanghai elevation system, the same as that of topographic map DEM. Then Glacier extent is recognized through MSS/TM remote sensing data, and glacier thickness change is extracted through topographic DEM and SRTM-DEM. Afterwards, glacier volume change is calculated and errors resulted from glacier extent recognition, multi-temporal remote sensing data and multi-source DEM data are controlled and analyzed well. The result is fine, thus providing scientific support to model glacier response to global change pattern and to predict regional water resources.

关 键 词：遥感技术 冰川监测 数字高程模型 体积变化 

分 类 号：TP751[自动化与计算机技术—检测技术与自动化装置] P343.6[自动化与计算机技术—控制科学与工程]