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