Methane table depth (z) exerts a more significant control on methane evaporation rates than the regolith porosity (ϕ). Shown here is the diurnal evolution of the (a) methane evaporation rate [kg m⁻² s⁻¹] scaled by 1E–6, (b) latent heat flux [W m⁻²], (c) skin temperature [K], (d) sensible heat flux [W m⁻²], and (e) PBL depth [m] for four NSMT simulations (labeled in panel (c)). The maximum depth of the PBL on Tsol 3 is listed in the text in panel (e). Note that panel (a) is scaled by ﹩1\times {10}^{-6}﹩. Individual simulations are labeled in panel (a) and include simulations with prescribed porosity, methane table depth pairs (pink line: ﹩\phi ﹩ = 0.15, z = 0.005 m; green line: ﹩\phi ﹩ = 0.5, z = 0.1 m; blue line: ﹩\phi ﹩ = 0.35, z = 0.06 m; orange line: ﹩\phi ﹩ = 0.25, z = 0.04 m).