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We present an effective parameterization of molecular absorption of shortwavesolar radiation in Venus atmosphere. It is addressed to general circulationmodeling to accelerate radiative transfer calculations in the spectral interval125 -- 400 nm (25000 -- 80000 cm$^{-1}$ ). In F-UV and M-UV regions strongabsorption of CO$_2$ ans SO$_2$ enables to parameterize gaseous absorption withonly three effective cross-sections. In N-UV region absorption of SO$_2$ andthe unknown UV absorber are parameterized with six effective cross-sections foreach species. For treatment of Rayleigh scattering and optical properties ofVenus clouds eight effective spectral points are recommended. Parameterizationswere validated by the original reference line-by-line Monte-Carlo radiativetransfer model. The outcome of the validation shows the discrepancy in fluxesless than 3%. Thus, it takes only eight-fold solution of radiative transferequations to correctly describe solar fluxes and heating rates in the wholeultraviolet region.

Effective parameterization of absorption by gaseous species and unknown UV absorber in 125-400 nm region of Venus atmosphere