Effective cross-sections for radiative transfer simulations in UV spectral interval of Venus atmosphere
Description
This dataset presents collection of the effective cross-sections of gaseous species and the unknown UV absorber for accelerating radiative transfer simulations of Venus atmosphere. The UV spectral interval is divided into 8 so-called k-intervals. One-time solution of radiative transfer equation with the use of the effective cross-sections in specific k-interval emulates line-by-line time-resoursful procedures. By comparing fast (k-distribution technique with effective cross-sections) and reference (Monte-Carlo line-by-line modeling) calculations, it was shown which species give significant impact on the cumulative heating rates. This is the reason why effective cross-sections are presented only for several species (CO2, SO2 and unknown ultravioet absorber). SO and O3 have a small impact on heating rate (less than 1K/day), but still presented in M-UV k-interval. The data are presented in the following way. Each folder name relates to the specific k-interval. Each folder contains simple binary files (.dat can be opened like .txt) with effective cross-sections for the major absorbers in chosen interval. The data inside every file are displayed in two columns. First column gives the amount of absorber along the ray of radiation in [cm^-2]. The second corresponds to the effective cross-sections in usual units [cm^2]. Presenting effective cross-sections in the way depending on absorber abundance (not height or pressure) is more convinient. It allows to use these tables regardless of the choice of atmospheric model and way of solving radiative transfer equation. For visualising the effective cross-sections simple python scirpt is located in the root directory.