“…The most straightfo rward extension is the incorporation of global radiation measureme nts which distribute melt in space according to local factors of aspect and account for varying solar position [9,10,36,12,32,24 ,13,28] . Further research has tried to include the evolution of snow density and snow cover albedo over the melt season [4,50,49,11,41,20 ]. This seasonality can also be emulated with time-varying snowmelt factors, e.g.…”