Physics
Scientific paper
Oct 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986jgr....9111851c&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 91, Oct. 20, 1986, p. 11851-11866.
Physics
29
Absorption Spectra, Approximation, Carbon Dioxide, Emission Spectra, Infrared Spectra, Planetary Atmospheres, Atmospheric Models, Line Shape, Radiative Heat Transfer, Spectral Bands
Scientific paper
Physical band models that use simplifying assumptions about the structure of the CO2 15-micron band are described and compared with the accurate line-by-line model of Fels and Schwarzkopf (1981). The methods have application to the models of the atmospheres of Venus, earth, and Mars. The narrow-band methods include a general random model and techniques employing the Malkmus (1967) line-strength distribution, and the accuracy of these models at low pressure is found to be sensitive to the line-strength distribution and the line shape. When combined with a simple Voigt parameterization, the more efficient approximate methods represented by an exponential wideband model are found to be almost as accurate as the expensive narrow-band models. Empirical logarithmic wideband models used in climate-modeling studies are found to be very efficient, but of limited range of validity.
Crisp David
Fels Stephen B.
Schwarzkopf Daniel M.
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