Active subglacial lake boundaries and ice-surface elevation-change products from DInSAR for the mid-to-upper reaches of David Glacier, East Antarctica, during 2017–2024

This dataset contains the principal research products generated for the analysis of active subglacial lakes in the mid-to-upper reaches of David Glacier, East Antarctica, from February 2017 to December 2024. The dataset includes mapped boundaries of active subglacial lakes inferred from DInSAR-observed ice-surface deformation, DInSAR-derived ice-surface elevation-change-rate and pixel-scale standard-error products, and tables of lake-scale elevation-change rates and first-order apparent net storage changes. Data are provided separately for each of the 16 mapped active subglacial lakes. Each lake-specific ZIP archive contains: 1. A mapped active subglacial lake boundary in ESRI Shapefile format. The boundary files are provided in WGS 84 geographic coordinates (EPSG:4326), and all required Shapefile components are included.2. InSAR-derived ice-surface elevation-change-rate products for approximately six-month analysis intervals. The products are provided as GeoTIFF files at 50 m spatial resolution in the Antarctic Polar Stereographic coordinate system (EPSG:3031). Elevation-change rates are expressed in meters per year (m/yr).3. Corresponding pixel-scale standard-error products for each elevation-change-rate interval. These products are also provided as GeoTIFF files at 50 m spatial resolution in EPSG:3031 and have the same spatial extent and grid as the corresponding elevation-change-rate products. Standard errors are expressed in meters per year (m/yr). GeoTIFF filenames follow the convention: [lake_name]_[start_date]_[end_date]_elevation_change_rate.tif[lake_name]_[start_date]_[end_date]_standard_error.tif where [start_date] and [end_date] define the observation interval represented by each product. Dates are formatted as [YYYYMMDD]. The dataset also includes two Microsoft Excel files. One file provides lake-scale ice-surface elevation-change rates and standard error for each analysis interval. The second provides interval-scale and cumulative first-order apparent net storage changes and associated uncertainties inferred by pixel-wise integration of the DInSAR-derived ice-surface elevation changes over the mapped lake areas. The reported volume changes should be interpreted as first-order apparent net storage changes inferred from ice-surface deformation rather than as direct or instantaneous measurements of basal cavity-volume change or total subglacial water transfer. Spatially variable elevation changes were integrated pixel by pixel at 50 m resolution within the mapped lake outlines. The mapped lake boundaries represent lake-associated ice-surface deformation footprints and should not be interpreted as direct observations of basal cavity geometry.