Mass balance of the Greenland and Antarctic ice sheets from 1992 to 2020

Abstract. Ice losses from the Greenland and Antarctic ice sheets have accelerated since 1990s, accounting for a significant increase in global mean sea level. Here, we present new 29-year record of sheet mass balance 1992 to 2020 Sheet Mass Balance Inter-comparison Exercise (IMBIE). We compare combine 50 independent estimates derived satellite observations temporal changes flow, volume, Earth's gravity field. Between 2020, contributed 21.0±1.9 mm level, with rate loss rising 105 Gt yr−1 between 1996 372 2016 2020. In Greenland, is 169±9 but there are large inter-annual variations balance, ranging 86 2017 444 2019 due variability surface balance. Antarctica, continue be dominated by West Antarctica (82±9 yr−1) and, lesser extent, Peninsula (13±5 yr−1). East remains close state small gain 3±15 yr−1, most uncertain component Antarctica's The dataset publicly available at https://doi.org/10.5285/77B64C55-7166-4A06-9DEF-2E400398E452 (IMBIE Team, 2021).