Observed hemispheric distributions as a function of θ(t) for the 1:1 SOR (top) and the 3:2 SOR with an eccentricity of 0.3 (bottom): surface temperature (blue-red), vertically integrated water vapour or H₂O (g) column density (white–blue), vertically integrated total cloud path (white-grey), and vertically integrated O₃ column density (dark blue– yellow). The longitude of perihelion of the 3:2 SOR is at 102.94^◦. For both SORs, we use four extreme cases of θ(t) (see Table 1). The distributions vary spatially and temporally, illustrating the orbital evolution of climate and chemistry, as well as the effects of viewing geometry.