Long-term firn and mass balance modelling for Abramov Glacier in the data-scarce Pamir Alay

Abstract. Several studies identified heterogeneous glacier mass changes in western High Mountain Asia over the last decades. Causes for these change patterns are still not fully understood. Modelling physical interactions between surface and atmosphere several decades can provide insight into relevant processes. Such model applications, however, have data needs which usually met data-scarce regions. Exceptionally detailed glaciological meteorological exist Abramov Glacier Pamir Alay range. In this study, we use weather station measurements combination with downscaled reanalysis to force a coupled energy balance–multilayer subsurface 52 years. Available situ used calibration validation. We find an overall negative balance of −0.27 mw.e.a-1 1968/1969–2019/2020 loss firn pore space causing reduction internal accumulation. Despite increasing air temperatures, do acceleration glacier-wide time. is compensated by precipitation rates (+0.0022 mw.e.a-1, significant at 90 % confidence level). Our results indicate correlation annual (R2 = 0.72).