Development of a line-by-line model for the infrared radiative transfer in the earth's atmosphere.

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Abstract
A procedure is presented here to make a compact data base of the absorption coefficient of seven radiatively active gases in the earth's atmosphere: H2O, CO2, O3, N2O, CO, CH4, O2. The data base covers the wavenumber region 20-3000cm−1. The temperature dependence of the square root of the absorption coefficients are represented by the quadratic form and its coefficients are given for ten values of pressure between 0.05 and 1013 mb. The number of the wavenumber points at which the absorption coefficients are given varies with pressure. The interval between these wavenumber points increases with the distance from the line center. The transmission function in the atmosphere is easily and accurately obtained by simple interpolation and polynomial calculation. A comparison is shown between the observed downward radiance and the theoretical one which is calculated with the use of the present data base.

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