Time evolution of the volume-integrated eddy kinetic energy (per unit area) in the baroclinic instability test. The solid and dotted lines both share the resolution (N_x,N_y,N_z) = (256,128,32) and correspond to the model with and without an initial temperature perturbation, respectively. The dashed and dot-dashed lines shows the results of the models with resolution (N_x,N_y,N_z) = (128,64,32) and (N_x,N_y,N_z) = (512,256,32), respectively.