This is only 32 ± 2 % of their Little Ice Age (LIA) extent of 40.9 ± 4.1 km2. Between 018, the 46 glaciers of the Austrian Silvretta lost −29 ± 4 % of their area and now cover 13.1 ± 0.4 km2. The vertical accuracy of the digital elevation models (DEMs) generated from six to eight lidar points per square metre is of the order of centimetres. We mapped the glacier outlines manually based on lidar elevation models and patterns of volume change at 1 to 0.5 m spatial resolution. In contrast, in the current state of the glacier only the patterns and amounts of volume change allow us to estimate the area of the buried glacier remnants. In previous inventories, a high proportion of active bare ice allowed a clear delineation of the glacier margins even by optical imagery. Identifying the glacier outlines offers a wide range of possible interpretations of glaciers that have evolved into small and now totally debris-covered cryogenic structures. A new high-resolution glacier inventory captures the rapid decay of the glaciers in the Austrian Silvretta for the years 20.
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