The initial methane vapor profile, and thus the initial methane gradient between the ground and the atmosphere, controls the rate of surface evaporation and subsequently the depth of the PBL. Panels show the multi-Tsol evolution of the (a) methane evaporation flux (scaled by ﹩1\times {10}^{-6}﹩), (b) latent heat flux, (c) surface skin temperature, (d) surface sensible heat flux, and (e) PBL depth for porosity ﹩\phi ﹩ = 0.02 initialized with the T. Gautier et al. (2024) and H. B. Niemann et al. (2010) methane profiles and zero methane. The maximum depth on the PBL on Tsol 3 is listed in the main text.