Influence of wind fields with macroscopic velocity gradients on the IR CO2 band emissions outgoing from a planetary atmosphere

Vladimir P. Ogibalov; Yuliya I. Bordovskaya

doi:10.1117/12.2645401

7 December 2022 Influence of wind fields with macroscopic velocity gradients on the IR CO₂ band emissions outgoing from a planetary atmosphere

Vladimir P. Ogibalov, Yuliya I. Bordovskaya

Author Affiliations +

Proceedings Volume 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics; 123411O (2022) https://doi.org/10.1117/12.2645401
Event: 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 2022, Tomsk, Russia

Abstract

Until now, a number of issues related to the energy and dynamics of the atmosphere of Venus remain unclear. In particular, this is the phenomenon of superrotation, which consists in the presence of a high-speed wind flow in a narrow high-altitude layer above the upper boundary of clouds in the equatorial atmosphere of Venus. In the framework of the simplified model, the problem of radiation transfer in the spectral lines of infrared CO₂ bands in the planetary atmosphere is considered, taking into account the frequency shift of the volume opacity coefficient due to the Doppler effect. Such frequency shift occurs when there is non-zero value of projection onto the ray pathway of the velocity vector of large-scale winds. For different viewing angles, the variability of the values of the radiation intensity leaving the atmosphere at the upper boundary was studied, depending on a number of parameters of both the model of the vertical gradient of the horizontal wind speed and the spectral parameters of the line (band). The analysis of the present study results allows us to conclude that further investigations of the above mentioned radiative transfer problem for more realistic models would be fruitful.

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Vladimir P. Ogibalov and Yuliya I. Bordovskaya "Influence of wind fields with macroscopic velocity gradients on the IR CO₂ band emissions outgoing from a planetary atmosphere", Proc. SPIE 12341, 28th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 123411O (7 December 2022); https://doi.org/10.1117/12.2645401

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