Glacier mass-balance estimates over High Mountain Asia from 2000 to 2021 based on ICESat-2 and NASADEM

Abstract High Mountain Asia (HMA) glaciers are critical water reserves for montane regions, which readily influenced by climate change. The glacier mass balance during 2000–2021 over HMA was estimated comparing the elevations from ICESat-2 and NASADEM. Radar penetration depth could be one of intrinsic error sources in estimating using Therefore, we doubled elevation differences between X-band Shuttle Topography Missions (SRTMs) NASADEM to estimate potential error. spatial characteristics altitude-dependent can detected most sub-regions HMA. Relatively deep penetrations Himalaya (2.3–3.7 m) Hissar Alay (4.3 regions small south-eastern (1.0 were observed. region experienced a significant loss at rate ?0.18 ± 0.12 m w.e. ?1 , Hengduan Shan exhibited highest ?0.62 0.10 West Kun Lun substantial gain 0.23 0.13 Karakoram showed more or less balance. Our results agreement with previous studies that assessed different methods.