Greenland Ice Sheet Mass Balance (1992–2020) From Calibrated Radar Altimetry

We present the first 1992–2020 record of Greenland Ice Sheet (GrIS) mass balance derived from multisatellite Ku-band altimetry. employ an empirical approach as alternative detailed to radar-propagation modeling, and instead convert elevation changes observed by radar altimetry into using spatiotemporal calibration fields. This field is a machine learning that optimizes prediction previously published function ice sheet variables. Our shows GrIS contribution 12.1 ± 2.3 mm sea-level equivalent since 1992, with more than 80% this occurring after 2003. also suggests 2017 hydrological year in 21st century which, within uncertainties, was balance. Overall, 28-year radar-derived we highlights potential method provide operational estimates