Large Eddy Simulations of the Dusty Martian Convective Boundary Layer With MarsWRF

Large eddy simulation (LES) of the Martian convective boundary layer (CBL) with a Mars-adapted version Weather Research and Forecasting model is used to examine impact aerosol dust radiative-dynamical feedbacks on turbulent mixing. The LES validated against spacecraft observations prior modeling. To study redistribution by coherent dynamical structures within CBL, two radiatively active distribution scenarios are used: one in which remains fixed another freely transported CBL motions. In scenario, increasing atmospheric loading shades surface from sunlight weakens convection. However, competing effect emerges free resulting lateral concentration updrafts. enhancement radiative heating upwelling plumes both generates horizontal thermal contrasts increases buoyancy production, jointly enhancing We define inhomogeneity index (DII) quantify how much concentrated plumes. If DII large enough, destabilizing can exceed stabilizing shading such that depth optical depth. Thus, under certain combinations total dust, positive feedback exists between depth, vigor mixing, and—to extent lifting controlled mixing—the further surface.