Effective cross-sections for radiative transfer simulations in UV spectral interval of Venus atmosphere

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.

本数据集展示了气态物种的有效截面以及未知紫外吸收剂，旨在加速金星大气辐射传输模拟。紫外光谱区间被划分为八个所谓的k区间。通过在特定的k区间内使用有效截面一次性求解辐射传输方程，模拟了逐线时间可变的程序。通过比较快速（k分布技术与有效截面）和参考（蒙特卡洛逐线建模）计算，揭示了哪些物种对累积加热速率产生显著影响。这是为何仅对几种物种（如二氧化碳、二氧化硫和未知紫外吸收剂）呈现有效截面的原因。一氧化硫和臭氧对加热速率的影响较小（小于1K/天），但仍在M-UV k区间中呈现。数据以以下方式呈现。每个文件夹名称与特定的k区间相对应。每个文件夹包含用于所选区间的主要吸收剂的有效截面的简单二进制文件（.dat文件可像.txt文件一样打开）。每个文件中的数据以两列显示。第一列给出辐射路径上吸收剂的量，单位为[cm^-2]。第二列对应于通常单位[cm^2]下的有效截面。根据吸收剂丰度（而非高度或压力）呈现有效截面，更为便捷。这允许无论大气模型的选择或辐射传输方程的求解方式如何，都可以使用这些表格。在根目录中提供了一个简单的Python脚本，用于可视化有效截面。