f. Zonal Wind Distribution (Troposphere)
Fundamentally, in all cases, the zonal wind distribution pattern is characterized by easterly wind over the equatorial region and westerly wind over other regions. In the distribution for Experiment S1380, it appears that the westerly jets bulge at the height of σ = 0.4 at latitudes 30° latitude north and south. Presumably, these correspond to the subtropical jets of the actual Earth; however, they are not sharply defined, because of the vertical filtering. With an increasing solar constant, the bulges, which correspond to the subtropical jets, appear to be located at higher altitudes (σ = 0.5 for Experiment S1200 and σ = 0.3 for Experiment S1570). Nonetheless, because identification of the jet axes from the present results is difficult, no further discussion on this matter will be presented.
Figure 1:Zonal wind (m/sec) distributions in equilibrium states.