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Atmospheric and Oceanic Optics

2018 year, number 10

Construction of the parameterization of the molecular absorption in the lower and middle atmosphere of the Earth in the infrared range

I.V. Mingalev, E.A. Fedotova, K.G. Orlov
Polar Geophysical Institute, 26а, Academgorodok St., Apatity, 184209
Keywords: параметризация молекулярного поглощения, собственное излучение атмосферы, расчет поля излучения, parameterization of molecular absorption, atmosphere radiation, calculation of radiation field


The paper presents a new algorithm for constructing parameterizations of molecular absorption in the Earth's atmosphere, which takes into account the change in the atmospheric gas composition with altitude and has a number of other advantages, as well as a parametrization constructed using this algorithm in the frequency range from 10 to 2000 cm-1 in the altitude range from the Earth's surface to 76 km. A comparison of the results of calculations of the eigenvalue field of the Earth's atmosphere, carried out using this parametrization, with the results of reference calculations (line-by-line) shows that the presented parametrization has good accuracy in the lower and middle atmosphere in the absence of cloud layers and in the presence of cloud layers with a large optical thickness.