The third glacier inventory of North Tyrol, Austria, for 2006

A new, third, glacier inventory (GI3) is presented for North Tyrol, which is based on Airborne Laser Scanning for the year 2006. 447 glaciers covering 235 km**2 are included. 4 small, formerly neglected glaciers have been added. Basic quantities such as size, maximum, minimum and median elevation show large variances. Very recent glacier changes between the former inventory (GI2: 1998) and GI3 show a strong reduction in area (-8%) and mean thickness (-7 m). An asymmetry of mean maximum, minimum and median elevation is quantified with approximately 200 m higher values for south-exposed glaciers. Rates of changes are around 1% per year and 1 m per year between GI2 and GI3. The strongest volume losses occurred for glaciers between 5 and 10 km**2.

本研究针对北蒂罗尔地区发布了一套全新的第三版冰川名录（Glacier Inventory 3, GI3），该名录基于2006年的机载激光扫描（Airborne Laser Scanning）数据构建。名录共涵盖447条冰川，总面积达235平方千米，新增了4条此前被遗漏的小型冰川。冰川的面积、最大海拔、最小海拔及中位海拔等基础参数均存在较大差异。对比上一版冰川名录（GI2：1998年版）与GI3，近期冰川变化呈现出显著缩减特征：面积减少8%，平均厚度减少7米。冰川的平均最大、最小及中位海拔存在不对称性——南向冰川的上述参数较其他朝向冰川高出约200米。GI2与GI3间隔期间，冰川变化速率约为每年1%的面积缩减及每年1米的厚度损失。面积介于5至10平方千米的冰川出现了最为严重的体积亏损。