Abstract

Many glacial landscapes on all continents are inscribed on the World Heritage List. Due to climate change, most of the glaciers are retreating rapidly, thus questioning their Outstanding Universal Value. This paper clarifies what constitutes the heritage values of glacial landscapes and outlines how the heritage values could evolve in a future with less (or without) ice. For two sites in the UNESCO Swiss Alps Jungfrau-Aletsch property (the Great Aletsch Glacier and the Upper Lauterbrunnen Valley), we describe the evolution of the glacial landscape using a Past-Present-Future framework. We then evaluate the present and post-glacial heritage values according to criteria used in the literature on geomorphosites. The results outline two main issues: (1) As glaciers retreat, the geoscientific value will depend more and more on the inherited glacial landforms, such as moraine ridges, which allow the understanding of the Earth and climate history, and less and less on the glacier itself and its dynamics. Their protection is therefore an important issue. (2) The aesthetic value of glacial landscapes could decrease because of the disappearance of the glacier (landscape greying). One possible adaptation could be a shift from glacier tourism, which is mainly oriented towards the contemplation of an aesthetic landscape, to geotourism, where the understanding of landscape evolution is proposed to the public.

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