Glacier Surface Velocities and Outlet Areas from 2014-2018 on James Ross Island, Northern Antarctic Peninsula

• Main Author: Lippl, Stefan
• Format: Dataset
• Language: English
• Published: PANGAEA 2019
• Subjects: Antarctic Peninsula; Geological sample; GEOS; Glacier area changes; Glacier velocities; James_Ross_Is; James Ross Island; Antarctic; Glacier Bay; Ross Island; Antarc*; The Cryosphere
• Online Access: https://doi.pangaea.de/10.1594/PANGAEA.907062; https://doi.org/10.1594/PANGAEA.907062

These data report the spatial and temporal variability of glacier surface velocities and the area of their outlets throughout James Ross Island at the northern Antarctic Peninsula. Manually digitized calving front positions from panchromatic Landsat-8 data at 15 m resolution were used to calculate outlet areas by using a common-box approach. The common-box outlines were digitized by using the relative steep apparent coastlines of the current glacier bay and the visible brim of the cliff in a Landsat-8 scene from 2017-02-20, as well as side boundaries from Davies et al. (2012). Velocity estimates are retrieved from intensity feature tracking of TerraSAR-X and TanDEM-X scenes between 2014 and 2018 and clipped to the outlet area of the temporally nearest data of the area data set. More details about the processing can be found in Lippl et al. (2019). The naming convention is: Areas: Area_*GlimsID_*LandsatSceneDate (Format: shapefile) Reference Polygon for Common-box approach: Area_*GlimsID_ReferencePolygon (Format: shapefile) Velocities: Velocity_*GlimsID_*LandsatScenceDate_dis_mag+*StartDate--*EndDate_crop.tif_focalStd21_crop.tif (Format: GeoTIFF, Unit: Meter per day) (Parameter after * are variable. StartDate and EndDate are the dates of the used TerraSAR-X and TanDEM-X scenes in intensity feature tracking. When no GlimsID was available for the glacier, the ID used by Davies et al. (2012) or names used in the submitted paper from Lippl et al. (2019) were applied.)