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  • Author or Editor: Frederick M. Luther x
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Frederick M. Luther

Abstract

An analytic expression for the specific heating rate due to solar absorption by nitrogen dioxide is derived by approximating the solar insolation and absorption cross section by simple functions of wavelength. The analytic expression agrees with a detailed calculation to within ±2 × 10−22 W throughout the range of NO2 column densities investigated (up to 1020 cm−2). The error is within ±0.3% for NO2 column densities less than 2 × 1017 cm−2. The error is generally within ±5% for the larger column densities which rarely, if ever, occur in the atmosphere.

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Frederick M. Luther

Abstract

The solar and longwave radiative effects of a stratospheric aerosol layer between 18 and 22 km are compared for a tropical atmosphere. The changes in the daily mean solar and longwave radiative fluxes above and below the aerosol layer are computed for two particle size distributions and as a function of the albedo of the earth's surface. The changes in the solar and longwave fluxes above the aerosol layer are found to be comparable in magnitude. In the troposphere, the reduction in the incoming solar radiation (cooling) is several times greater than the increase in the downward longwave radiation (warming), the difference decreasing with increasing surface albedo.

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