Locations, outlines and ICESat-2 tracks of active lakes at the onset of the Jutulstraumen Glacier (Antarctica) ...

• Main Authors: Neckel, Niklas, Franke, Steven, Helm, Veit
• Format: Dataset
• Language: English
• Published: PANGAEA 2021
• Subjects: Antarctica; AWI UWB; DInSAR; Dronning Maud Land; ICESat-2; Jutulstraumen; Sentinel-1; subglacial hydrology; subglacial lakes; Multiple investigations; Aircraft; P6_215_UWB_2018; POLAR 6; Jutulstraumen Glacier; Antarc*
• Online Access: https://dx.doi.org/10.1594/pangaea.927120; https://doi.pangaea.de/10.1594/PANGAEA.927120

We analysed a 6 year time series of displacement maps from Sentinel-1 SAR interferometry in the upstream region of Dronning Maud Lands Jutulstraumen Glacier (Antarctica). Our results reveal short-term cascade-like events of subsidence and uplift of the ice surface, which we interpret as drainage and filling of subglacial water pockets. This indicates a periodic transport of subglacial water through an interconnected drainage system. The water re-location events in this study are located in a slow flowing region 225~km upstream of the grounding line. An examination of high-resolution ultra-wideband radar data and the hydropotential gradient reveals that subglacial water is moving downstream along a canyon-like system of local valleys. ... : Here we provide:1. outlines of the areas of subsidence and uplift, which represent the locations of active subglacial lakes D, E and F (see Figure 1 in the publication connected to this data set).* the outlines are provided as shapefiles (polygons)* Filename: JG_interferometry_lake_outlines.shp* CRS: EPSG:3031. 2. a csv file containing the lake center coordinates (JG_lake_coordinates)3. processed ICESat-2 tracks intersecting with the lake outlines (ICE_a and ICE_b in the manuscript; see Figure 2 for details). The data is stored in csv files and archived in ICESat-2_tracks.zip.* ICE_a track specification: RGT 0732 - GT3l * ICE_b track specification: RGT 1235 - GT1rContact: Steven Franke mailto:[e-mail] and Niklas Neckel mailto:[e-mail] ...