Elevation changes of Wordie Ice Shelf tributaries derived from TanDEM-X digital elevation models and satellite altimetry data (2014–2025)

We present a new TanDEM-X elevation change dataset for the main tributary glaciers in the Wordie Bay catchment located on the Antarctic Peninsula. We generated new digital elevation models (DEMs) from bistatic synthetic apperature radar (SAR) scenes acquired in austral winters for 2014, 2016/17, and 2024/25. For each DEM we also provide the date rasters containing the effective, per-pixel acquisition date (in decimal years). We then computed the elevation change rates (dhdt) and used hypsometric void filling to create catchment-wide dhdt rasters (dhdt_void_filled) for the periods 2014-2016/17, 2014-2024/25 and 2016/17-2024/25. Additionally, we used ICESat-2 laser altimeter data from 2020-2025. Using captoolkit (https://github.com/nasa-jpl/captoolkit, commit 2176f3e; Paolo et al., 2020, https://doi.org/10.5281/zenodo.3665785), we computed elevation change rates from ICESat-2 repeat-tracks, interpolated them to a raster via kriging, and calculated elevation change rates at crossover locations between ascending and descending orbits. For validation, we provide the computed differences between the TanDEM-X DEMs and dhdt rasters versus CryoSat-2 and ICESat-2 elevations and CryoSat-2 dhdt, aggregated to a 500 x 500 m grid. We also provide the catchment outlines and glacier centerlines we used in our analysis (2014, 2017, 2025). We organized our dataset in seven subfolders: DEM: contains the TanDEM-X DEM mosaics as GeoTIFFs for: 2014, 2016/17, and 2024/25 date: contains the effective acquisition date per pixel in decimal years for: 2014, 2016/17, and 2024/25 dhdt: contains the dhdt rasters as GeoTIFFs for: 2014 - 2016/17, 2014 - 2024/25, and 2016/17 - 2024/25 dhdt_void_filled: contains the void-filled dhdt rasters as GeoTIFFs for: 2014 - 2016/17, 2014 - 2024/25, and 2016/17 - 2024/25 ICESat_2: contains the interpolated repeat-track dhdt raster and its kriging error raster, and repeat-track and crossover point shapefiles validation: contains two subfolders (CS2, IS2) with the elevation differences as point shapefiles for: 2014 (CryoSat-2 only), 2016/17 (CryoSat-2 only), 2024/25, and the TanDEM-X minus CryoSat-2 dhdt differences as GeoTIFFs for: 2014 - 2016/17, 2014 - 2024/25, and 2016/17 - 2024/25 vector_data: is split into two subfolders: Centerlines contains the line shapefiles of the eight main tributary glaciers, and Outlines contains the catchment outlines for: 2014, 2017, and 2025 CryoSat-2 CryoTEMPO-EOLIS point product (swath) data is provided via https://cryotempo-eolis.org/point-product/ and by the European Space Agency (ESA). The processing code for the TanDEM-X mosaicking, dhdt, void filling and uncertainty assessment, the ICESat-2 filtering and interpolation, and the validation is available at https://github.com/AntoniaWarnstedt/tandemx-glacier-mosaic-mass-balance. More detailed information on each dataset is given in the README.txt.