Proposal for geomorphological mapping of debris-covered and rock glaciers and its application to Tröllaskagi Peninsula (Northern Iceland)

This work defends and applies a new proposal for mapping debris-covered glaciers and rock glaciers. This proposal combines highly accurate traditional methods, such as manual geomorphological photointerpretation, with novel digital techniques. The new methodological strategy applies rendering and lighting tools from Computer-Aided Design platforms and uses graphic design from Desktop Publishing Programs, to improve the geovisualization of geomorphological maps. This combination was applied to the debris-covered glacier and a set of rock glaciers located on the Tröllaskagi peninsula (northern Iceland). The result is a 1:4,500 scale geomorphological map of 16 km2, which for the first time maps the features that differentiate the debris-covered glacier from rock glaciers, as well as genetically different units within each formation and a long series of landforms characteristic of different processes. This map thus becomes a very useful tool in the evolutionary study of these formations in relation to the impact of climate change.本研究提出并应用了一套全新的冰碛覆盖冰川与岩冰川测绘方案。该方案将高精度传统方法（如人工地貌影像解译）与新型数字技术相结合：采用计算机辅助设计（Computer-Aided Design, CAD）平台的渲染与光照工具，并结合桌面出版程序的平面设计手段，以优化地貌图的地理可视化效果。该方法组合被应用于冰岛北部特罗拉斯卡吉半岛（Tröllaskagi peninsula）的一处冰碛覆盖冰川与一组岩冰川。最终成果为一幅比例尺1:4500、覆盖面积16平方千米的地貌图，该图首次实现了冰碛覆盖冰川与岩冰川的特征区分，同时厘清了每种地貌体内部的成因差异单元，并标注了一系列由不同地质过程形成的典型地貌形态。因此，该地貌图可为研究这些地貌体在气候变化影响下的演化过程提供极具价值的辅助工具。