| Summary: | This is the modelled basal melt rates and modelled basal temperature relative to the pressure melting point in ten experiments using different geothermal heat flux (GHF) maps as forcing for an offline coupling between a forward thermal model and an inverse mechanical model. The forward model consists of a thermomechanical steady state model using an improved shallow ice approximation in equilibrium with the subglacial hydrological system. The inverse model is solved using 3D full Stokes model. Eight GHF maps are from Martos et al. (2017), Purucker (2012), Shen et al. (2020), An et al. (2015), Shapiro and Ritzwoller (2004), Stål et al. (2021), Lösing et al. (2021) and Haeger et al. (2022). The other two maps are mean GHF and constant GHF. Mean GHF is the ensemble mean of the 8 GHF datasets above interpolated into 2.0 km resolution. The constant GHF is the mean of the ensemble mean GHF, 59 mW m-2. For the modelled results using GHF map from the 8 datasets, the filename includes the family name of the first author of the GHF map that is used. For instance, basal_meltrate_an.nc provides the modelled basal melt rates using An et al. (2015) GHF. For the modelled results using the ensemble mean GHF, the filename includes _mean. For instance, basal_meltrate_mean.nc provides the modelled basal melt rates using the ensemble mean of 8 GHF maps. For the modelled results using constant GHF, the filename includes _constant. For instance, basal_meltrate_constant.nc provides the modelled basal melt rates using constant GHF. Basal melt rate and temperature files are provided in netcdf format. The netcdf files have 2D grids only. The unit of modelled basal melt rate is mm/yr. Positive values represent melting and negative values represent freezing. The unit of modelled basal temperature relative to the pressure melting point is degrees Celsius. The nodata value outside our modelled domain is given as -9999. The specularity content is derived from radar data collected by ICECAP (Dow et al., 2020) and interpolated to 10 km by 10 km ...
|
|---|