Spectra for two atmospheres with temperatures and optical thicknesses as the 1500 K case at 1 μm (now taken to be constant with wavelength) and single-scattering albedos of unity, with a difference in phase function. The solid line is the spectrum for the more forward-scattering particles (g = 0.83), the dashed line is for the isotropically scattering particles (g = 3 × 10^-4).