Mie scattering by three polydispersions

Piffalls in atmospheric correction of ocean color imagery: how should aerosol optical properties be computed?

Current methods for the atmospheric correction of ocean-color imagery rely on the computation of optical properties of a mixture of chemically different aerosol particles through combination of the mixture with it into an effective, single-particle component that has an average refractive index. However, a multi-component approach in which each particle type independently grows and changes its refractive index with increasing humidity is more realistic. Computations based on Mie theory and radiative transfer are used to show that the two approaches result in top-of-the-atmosphere radiances that differ more than the water-leaving radiance. Thus, proper atmospheric correction requires a multicomponent approach for the computation of realistic aerosol optical properties.

In situ photometric observations of angular scattering from atmospheric aerosols

A large polar nephelometer was flown on a high-altitude balloon to 26.6 km over New Mexico in June 1974 just before the incursion of Fuego volcanic dust. Angular-scattering intensity and polarization observations depict the vertical structure of absolute optical parameters and, as a result, the distribution of atmospheric aerosols. An uncommon phenomenon was detected at 25 km: a stratospheric cloud near the San Andres mountains. These data are compared to findings from a previous flight in November 1970 in which significant altitudinal variability in the atmospheric scattering phase function was evident.

Calculated mie scattering properties in the visible and infrared of measured los angeles aerosol size distributions

Aerosol size distributions of varying types selected from those measured in clear air, smog, and fog in the Los Angeles Basin have been used with Lorenz-Mie scattering theory to predict radiation scattering by aerosols. Eleven different indices of refraction were assumed for wavelengths from 0.488 microm to 8.4 microm for aerosol materials with varying humidity, and for water and quartz. The effect on the scattering by the type of size distribution and the complex index of refraction is shown as a function of the polarization parameters of polarization, polarization ratio, ellipticity, and the inclination angle of the polarization ellipse.