A new digital elevation model (DEM) dataset of the entire Antarctic continent derived from ICESat-2

Abstract. Antarctic digital elevation models (DEMs) are essential for fieldwork, ice motion tracking and the numerical modelling of sheet. In past 30 years, several DEMs derived from satellite data have been published. However, these either coarse spatial resolution or aggregate observations spanning which limit their further scientific applications. this study, new generation laser altimeter Ice, Cloud, Land Elevation Satellite-2 (ICESat-2) is used to generate a DEM both sheet shelves. Approximately 4.69 × 109 ICESat-2 measurement points November 2018 2019 estimate surface elevations at resolutions 500 m 1 km based on spatiotemporal fitting method. 74 % Antarctica observed remaining observation gaps interpolated using normal kriging The formed estimated in grid cells, finally posted m. National Aeronautics Space Administration (NASA) Operation IceBridge (OIB) airborne evaluate generated (hereafter called DEM) individual regions types. Overall, median bias −0.19 root-mean-square deviation 10.83 result approximately 5.2 106 OIB points. accuracy uncertainty vary relation slope roughness, more reliable estimates found flat interior. comparable other altimetry, stereophotogrammetry interferometry. Similar results when comparing measurements kinematic Global Navigation Satellite System (GNSS) (GPS Russian GLONASS) transects. high ability annual updates make an addition existing groups, it can be (including map uncertainty) downloaded Tibetan Plateau Data Center, Institute Research, Chinese Academy Sciences https://data.tpdc.ac.cn/en/disallow/9427069c-117e-4ff8-96e0-4b18eb7782cb/ (last access: 27 June 2022) (Shen et al., 2021a, https://doi.org/10.11888/Geogra.tpdc.271448).