Both problems are crucial to understand the radiative properties of desert dust aerosol.
This movement can influence climate by changing the atmospheric and oceanic circulation and by altering the distribution of radiative heating and cooling.
The decays of tau's including radiative corrections are simulated by the dedicated package TAUOLA.
Knowledge of cloud and aerosol physics, boundary layer meteorology, and radiative transfer will also be useful.
This effect has been tentatively attributed to impact ionization followed by hot carrier interband radiative recombination.