Zonal mean zonal winds at ~250 hPa for different model simulations. (a) Simulations with different bottom depths using T_Obs with resolutions detailed in Table 2 (b) Simulations testing the sensitivity to different model parameters using T_Obs and 30 bar bottom layer depth. (c) Simulations with the idealized T_fit forcing, where the dotted lines are for simulations with a depth of 10 bar. In all the panels the red curve is the analytical fit for the observation (Sromovsky & Fry 2005).