ABSTRACT

Here we present a glacial and periglacial geomorphological map of a ∼6800 km² region of central Troms and Finnmark county, Arctic Norway. The map is presented at a 1:115,000 scale with the aim of characterising the spatial distribution of glacial and periglacial landforms and facilitating the reconstruction of the glacial history of the region during the latter stages of deglaciation from the Last Glacial Maximum and into the Holocene. Mapping was conducted predominantly by manual digitisation of landforms using a combination of Sentinel-2A/2B satellite imagery (10 m pixel resolution), vertical aerial photographs (<1 m pixel resolution), and Digital Elevation Models (10 and 2 m pixel resolution). Over 20,000 individual features have been mapped and include moraines (subdivided into major and minor moraines), ridges within areas of discrete debris accumulations (DDAs), flutings, eskers, irregular mounded terrain, lineations, glacially streamlined bedrock, possible glacially streamlined terrain, pronival ramparts, rock glaciers (subdivided into valley wall and valley floor, and rock glacierised moraines), lithalsas, contemporary glaciers and lakes. The map records several noteworthy large moraine assemblages within individual valleys, forming inset sequences from pre-Younger Dryas limits up to the 2018/19 ice margins and represents a valuable dataset for reconstructing Holocene glacial and periglacial activity.

摘要

在这里，我们展示了 ∼6800 km ²的冰川和冰缘地貌图特罗姆斯中部地区和挪威北极地区的芬马克县。该地图以 1:115,000 的比例呈现，旨在描绘冰川和冰缘地貌的空间分布，并促进该地区在从末次盛冰期到全新世冰川消退后期阶段的冰川历史重建。制图主要是通过结合使用 Sentinel-2A/2B 卫星图像（10 m 像素分辨率）、垂直航拍照片（<1 m 像素分辨率）和数字高程模型（10 和 2 m 像素分辨率）手动数字化地形进行的. 已经绘制了超过 20,000 个单独的特征，包括冰碛（分为主要和次要冰碛）、离散碎片堆积 (DDA) 区域内的山脊、凹槽、eskers、不规则的丘状地形、线、冰川流线型基岩、可能的冰川流线型地形、前壁垒、岩石冰川（细分为谷壁和谷底，以及岩石冰川化碛）、岩浆岩、当代冰川和湖泊。该地图记录了各个山谷内几个值得注意的大型冰碛组合，形成了从早年仙女木边界到 2018/19 冰缘的插入序列，是重建全新世冰川和冰缘活动的宝贵数据集。