Locations, outlines and ICESat-2 tracks of active lakes at the onset of the Jutulstraumen Glacier (Antarctica)
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...
| Main Authors: | , , |
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| Format: | Dataset |
| Language: | English |
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PANGAEA - Data Publisher for Earth & Environmental Science
2021
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| Subjects: | |
| Online Access: | https://dx.doi.org/10.1594/pangaea.927120 https://doi.pangaea.de/10.1594/PANGAEA.927120 |
| Summary: | 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:steven.franke@awi.de and Niklas Neckel mailto:niklas.neckel@awi.de |
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