Mapping of meltwater pathways around the Keewatin sector of the Laurentide ice sheet from ArcticDEM data ...

• Main Authors: Lewington, Emma, Livingstone, Stephen, Clark, Christopher, Sole, Andrew, Storrar, Robert
• Format: Dataset
• Language: unknown
• Published: The University of Sheffield 2020
• Subjects: 40602 Glaciology; FOS Earth and related environmental sciences; 40606 Quaternary Environments; Ice Sheet; Keewatin; Sea ice
• Online Access: https://dx.doi.org/10.15131/shef.data.12752987.v1; https://figshare.shef.ac.uk/articles/Mapping_of_meltwater_pathways_around_the_Keewatin_sector_of_the_Laurentide_ice_sheet_from_ArcticDEM_data/12752987/1

This dataset contains meltwater pathways i.e. the manual digitisation of all visible traces of subglacial meltwater flow (e.g. meltwater channels, meltwater tracks and eskers). Mapping was undertaken in ArcGIS 10.4 using hill shaded Digital Surface Models (DSMs) following standard practices. Meltwater pathway centrelines were mapped as polylines. We used 10 m ArcticDEM data (freely available at: https://www.pgc.umn.edu/data/arcticdem/). Data is projected to National Snow and Ice Data Centre (NSIDIC) Sea Ice Polar Stereographic North and referenced to WGS84 horizontal datum (EPSG:3413). Mapping was undertaken using the same projection. The meltwater pathways mapped have been updated since the publication of this paper. Updated mapping is included here so as to present the most up to date and complete efforts. However, updated pathways only account for ~ 2 % of total, many of which are smaller, fine-scale features. Most of the updated pathways occur outside of the sample areas used in the paper and thus ...