Ultraviolet aureole around a source at a finite distance
Applied Optics
|March 4, 2010
Summary
This study models UV spectral irradiance, accounting for ozone and aerosols. The findings aid remote sensing of atmospheric trace gases and aerosols.
Area of Science:
- Atmospheric Optics
- Radiative Transfer
- Spectroscopy
Background:
- Accurate modeling of UV spectral irradiance is crucial for atmospheric remote sensing.
- Understanding light scattering and absorption by atmospheric constituents like ozone and aerosols is essential.
Purpose of the Study:
- To calculate direct and scattered spectral irradiance from a UV source at varying ranges and altitudes.
- To develop a general method for modeling multiple scattering in realistic atmospheres.
Main Methods:
- Numerical calculations for single scattering and approximate multiple scattering by air molecules.
- Monte Carlo techniques for high-order multiple scattering by air molecules and aerosols in a uniform atmosphere.
Main Results:
- Accurate attenuation by tropospheric ozone and single scattering by air molecules and aerosols.
- Approximation for multiple scattering is valid for short ranges and low aerosol concentrations.
- Monte Carlo method provides a general approach for multiple scattering in various media.
Conclusions:
- The developed method accurately models UV spectral irradiance considering atmospheric components.
- This work supports remote sensing applications for ozone, aerosols, and other trace atmospheric species.
