Absorption coefficient of CO2 dimers within 4.3 and 15 mm CO2 bands
O.B. Rodimova
V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
Keywords: IR spectrum, carbon dioxide, dimers (СО), spectral line wings
Abstract
Absorption due to (СО2)2 dimers is estimated as the difference between the experimental CO2 absorption and that calculated on the basis of the asymptotic line wing theory. This procedure successfulness depends on the quantity and quality of the given experimental data. Available absorption data on the absorption within the 4.3 and 15 mm СО2 bands do not satisfy in full these requirements. However the qualitative agreement of the dimer absorption obtained with the measured and calculated positions of the (СО2)2 bands allows one to say about the procedure as about additional way of estimate absorption of the stable dimers of the H2O and CO2 molecules important for the atmospheric IR absorption.
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