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

A procedure for the development of a compact accurate data base of the absorption coefficients in a wavenumber region of 20-3000/cm was developed on the basis of the AFGL line data (described by Rothman et al., 1982) on seven radiatively active gases in the earth's atmosphere, including H2O, CO2, O3, N2O, CO, CH4, and O2. Using this procedure, the absorption coefficient at any wavenumber, temperature, and pressure can be obtained by simple interpolation of polynomial calculation. The coefficients are presented for ten values of pressure between 0.05 and 1013 mb. The theoretical radiance calculated with the use of these data base are compared with the observed downward radiance.