  The method of the optical parameter estimations of the nonisothermal giant
planet atmospheres by using intensity data of Raman scattering features was
used. We applied this method to the observational data of Uranus' geometric
albedo spectra from 1981, 1993 and 1995 and obtained the spectral values of the
optical depth, namely, $\tau_a/\tau_R$ and $\tau_\kappa/\tau_S$ (where
$\tau_a$, $\tau_R$ are aerosol and gas components, $\tau_S=\tau_a+\tau_R$ and
$\tau_\kappa$ is absorption component of the effective optical depth of the
intensity of diffuse - reflected irradiation forming). We showed that these
ratios are different for the three years. The conclusion is that this effect
can be due to the horizontal inhomogeneity of aerosol component of optical
depth over the Uranus' disk.

Astrophysics