Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2017, Vol. 14, No. 5, pp. 259-267
The effect of optically thick cloud layers on heating of the atmosphere self emission at mid-latitudes
I.V. Mingalev
1 , E.A. Fedotova
1 , К.G. Orlov
1 1 Polar Geophysical Institute RAS, Apatity, Russia
Accepted: 01.06.2017
DOI: 10.21046/2070-7401-2017-14-5-259-267
This paper presents the results of line-by-line calculations of intrinsic radiation in the Earth’s atmosphere at mid-latitudes in the frequency range of 10–2000 cm–1 in the presence of cloud layers in the lower, middle and upper tiers having large optical thicknesses. In the calculations, frequency resolution was 0.001 cm–1, and altitude resolution was 200 m. The aim of this work was to determine the boundaries of atmosphere heating rate by the intrinsic radiation in the presence of cloud layers, as well as study the effect of these layers on intrinsic radiation field of the atmosphere. The calculations show that the cloud layers of large optical thickness substantially affect the atmosphere’s self-radiation field in the frequency range from 10 to 2000 cm–1. Below cloud layers, the upward and downward fluxes have higher values than the flows calculated for a cloudless atmosphere. Downstream own radiation of the atmosphere above the cloud layer is not significantly different from the flow calculated for a cloudless atmosphere. Upstream natural radiation of the atmosphere above the cloud layer is much smaller than the flow calculated in the absence of the cloud layer. The higher the cloud layer, the more it reduces the upward flow of self-radiation of the atmosphere at its upper boundary.
Keywords: reference calculations of radiation fluxes, the emission of the atmosphere
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