Examples of Legendre polynomial series fitting of the temperatures as a function of latitude for four different pressure levels. The two lower pressure profiles (0.1 and 1.1 mbar) are from the Giles et al. (2020) dataset that we primarily use in this paper. The higher pressure profiles (39.8 and 98 mbar) are from the Fletcher et al. (2020) dataset. Fits are in solid lines and data are shown with symbols and error bars of corresponding color.