Glacier changes in the Austrian Alps during the last three decades, derived from the new Austrian glacier inventory
Glacier changes in the Austrian Alps during the last three decades, derived from the new Austrian glacier inventory
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DOI：
10.3189/172756407782871341
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发表时间：
2007-10
影响因子：
2.9
通讯作者：
A. Lambrecht;M. Kuhn
中科院分区：
文献类型：
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作者：
A. Lambrecht;M. Kuhn
摘要从1996年开始，为奥地利新的冰川清单拍摄了航空照片，产生了数字高程模型(DEM)和数字正射影像。按照目前的技术水平，重新评估了早先的奥地利冰川清单，其中载有1969年的原始航空照片和冰川地图，以及对各种冰川参数的手工评估。这两份清单为比较29年间的冰川反应提供了基础。总体而言，1969年至1998年间，奥地利几乎所有冰川的冰川面积都有所减少。冰盖面积总体减少17%。由DEM计算出的冰川体积变化约为5千米~3。这几乎是1969年奥地利冰量的22%，根据体积-面积关系估计。然而，个别冰川的变化表现出很大的变异性，这取决于它们的大小和地形环境。
Abstract Beginning in 1996, aerial photographs were taken for a new Austrian glacier inventory, resulting in digital elevation models (DEMs) and digital orthoimages. An earlier inventory of the Austrian glaciers containing the original aerial photographs and glacier maps and a manual evaluation of various glacier parameters as of 1969 has been re-evaluated at the present state of the art. The two inventories provide the basis for the comparison of glacier reactions over a period of 29 years. In general a reduction of glacier area is observed for almost all Austrian glaciers between 1969 and 1998. The overall reduction in ice-covered area is 17%. The glacier volume change calculated from the DEMs amounts to about 5 km3. This is almost 22% of the ice volume in Austria in 1969, estimated from a volume–area relation. Changes of individual glaciers, however, show a wide variability, depending on their size and physiographic setting.