The CO2 absorption coefficient in band wings at low temperatures
O.B. Rodimova
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: IR absorption, carbon dioxide, temperature behavior, line wing
Abstract
Carbon dioxide is a perceptible component of Earth's atmosphere and a significant part of the atmospheres of other planets of the terrestrial group. In this work, absorption by carbon dioxide is considered on the basis of the asymptotic line wing theory. Line contour parameters have been found by fitting to experimental values at 200-300 K temperatures in the 4.3 mm CO2 band. The different temperature behavior of the absorption is noted near the band (2400-2440 cm-1) and far from it (2500-2590 cm-1). The results of this study are of interest for spectroscopy and can be important in atmospheric modeling.
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