The heating effect of the 15-micron band of carbon dioxide in the mesosphere is estimated based on the approximation of the isolated line. The Voigt line profile and temperature dependence of line intensities are taken into account, but vibrational relaxation is not. The latter affects the magnitude but not the sign of the heating rates above approximately 75 km. The principal result is that although the 15-micron band cools most of the mesosphere, it produces a warming effect in much of the regions above 70 km. (See also P-3595, P-3597.) 13 pp. Bibliog.
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