Surface mass balance (SMB) represents the net effect of all processes that add or remove mass from the surface of an ice sheet. For the Antarctic Ice Sheet (AIS), snowfall is the primary SMB contributor, delivering ~2300 Gt annually (van Wessem et al. 2018; Agosta et al. 2019; Mottram et al. 2021). Sublimation represents the largest negative term in the AIS SMB, given that most surface melt refreezes within the firn (Mottram et al. 2021).