ABSTRACT

This paper combines a new chronosequence of deglaciation from 1952 to 2015 for Glacier Blanc, French Alps, with an analysis of the proglacial area greening trend. Deglaciated landscapes are ideal natural arenas to investigate geoecological processes, and the Glacier Blanc is an interesting case as it offers a contrasted geomorphological context. The relationships between vegetation and glaciological, geomorphological and hydrological features have first been assessed by revising the existing chronosequence of deglaciation by geo-referencing 12 historical images which has allowed the production of a dense high resolution glacier outline sequence since 1952. Geomorphological and hydrological features have been mapped by photo-interpretation of historical images. The spatial distribution of vegetation and greening trends were assessed using a 2015 high resolution infra-red images and 35-years of Landsat images from 1984 to 2019. The main map illustrates the spatial intertwining of geomorphological and hydrological features with vegetation primary succession in a deglaciated landscapes.

摘要

本文结合了法国阿尔卑斯山Glacier Blanc从1952年到2015年的一次新的冰消时序，并分析了冰原地区的绿化趋势。冰川消融的景观是研究地质生态过程的理想自然场所，而冰川白兰地是一个有趣的案例，因为它提供了对比鲜明的地貌背景。植被与冰川，地貌和水文特征之间的关系首先通过对现有的冰消时序进行了评估，方法是对12幅历史图像进行地理参考，这使得自1952年以来便产生了密集的高分辨率冰川轮廓序列。地貌和水文特征具有通过对历史图像的照片解释来映射。