Abstract

The effect of neutral atmospheric parameters on the radiation transfer in the Lyman-alpha line and the electron concentration in the ionospheric D region is studied for various seasons and nitric oxide (NО) concentrations. The radiation transfer was calculated with a modified radiation transfer model that allows multiscattering radiation effects. The atomic hydrogen and molecular oxygen profiles affecting Lyman-alpha radiation propagation were given with the MSIS-00 model. It is shown the radiation fluxes in the Lyman-alpha line and the electron concentration in the D region can be markedly affected upon sudden stratospheric warming and by the influence of planetary waves on the mesosphere. The changes in radiation fluxes in the Lyman-alpha line under unstable atmospheric conditions in the winter and the possible NО variations qualitatively explain the phenomenon of the winter anomaly.

中文翻译：

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氢Lyman-α线中辐射转移的特定特征及其与电离层D区电子浓度变化的可能关系

摘要

研究了不同季节和一氧化氮（NО）浓度下中性大气参数对Lyman-alpha线中辐射传输和电离层D区电子浓度的影响。使用改进的辐射传输模型计算辐射传输，该模型允许多重散射辐射效果。MSIS-00模型给出了影响Lyman-α辐射传播的原子氢和分子氧分布。它显示了Lyman-alpha线中的辐射通量和D中的电子浓度平流层突然变暖以及行星波对中层层的影响会明显影响该区域。在冬季不稳定大气条件下，Lyman-alpha线中辐射通量的变化以及可能的NО变化定性地解释了冬季异常现象。