On the potential of very high-resolution repeat DEMs in glacial and periglacial environments

被引:91
作者
Abermann, J. [1 ]
Fischer, A. [2 ]
Lambrecht, A. [2 ]
Geist, T. [3 ]
机构
[1] Austrian Acad Sci, Commiss Geophys Res, A-1010 Vienna, Austria
[2] Univ Innsbruck, Inst Meteorol & Geophys, A-6020 Innsbruck, Austria
[3] ALR Aeronaut & Space Agcy, FFG Austrian Res Promot Agcy, Vienna, Austria
关键词
INVENTORY; ALPS; VOLUME; PERMAFROST; SATELLITE; TRENDS; RATES; AREA;
D O I
10.5194/tc-4-53-2010
中图分类号
P9 [自然地理学];
学科分类号
0705 ; 070501 ;
摘要
The potential of high-resolution repeat DEMs was investigated for glaciological applications including periglacial features (e. g. rock glaciers). It was shown that glacier boundaries can be delineated using airborne LIDARDEMs as a primary data source and that information on debris cover extent could be extracted using multi-temporal DEMs. Problems and limitations are discussed, and accuracies quantified. Absolute deviations of airborne laser scanning (ALS) derived glacier boundaries from ground-truthed ones were below 4m for 80% of the ground-truthed values. Overall, we estimated an accuracy of +/-1.5% of the glacier area for glaciers larger than 1 km(2). The errors in the case of smaller glaciers did not exceed +/-5% of the glacier area. The use of repeat DEMs in order to obtain information on the extent, characteristics and activity of rock glaciers was investigated and discussed based on examples.
引用
收藏
页码:53 / 65
页数:13
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