{"title":"Photodetachment rates for O⁻ and O₂⁻ in the D layer of the ionosphere as function of solar zenith angle and solar activity","authors":"Stanislav Kozlov, Andrey Lyakhov","doi":"10.12737/szf-94202312","DOIUrl":null,"url":null,"abstract":"We present the results of calculation of photodetachment rates for negative ions in the D layer of the ionosphere, using recent photodetachment cross-section measurements. The calculations have been made for the standard atmosphere by means of the TUV (Terrestrial UltraViolet) code. We have obtained dependences of the photodetachment rates on altitude and solar zenith angle. The nonlinear nature of these dependences causes similar variations in the role of the photodetachement processes with altitude and solar zenith angle as compared to other processes in the middle atmosphere and the lower ionosphere, especially under terminator conditions. Calculations with solar spectrum for 2011–2020 for the summer/winter solstice and the spring/autumn equinox have shown no quantitative difference between the photodetachement rates for ions in the D layer of the ionosphere.","PeriodicalId":351867,"journal":{"name":"Solnechno-Zemnaya Fizika","volume":"19 6","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solnechno-Zemnaya Fizika","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.12737/szf-94202312","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We present the results of calculation of photodetachment rates for negative ions in the D layer of the ionosphere, using recent photodetachment cross-section measurements. The calculations have been made for the standard atmosphere by means of the TUV (Terrestrial UltraViolet) code. We have obtained dependences of the photodetachment rates on altitude and solar zenith angle. The nonlinear nature of these dependences causes similar variations in the role of the photodetachement processes with altitude and solar zenith angle as compared to other processes in the middle atmosphere and the lower ionosphere, especially under terminator conditions. Calculations with solar spectrum for 2011–2020 for the summer/winter solstice and the spring/autumn equinox have shown no quantitative difference between the photodetachement rates for ions in the D layer of the ionosphere.
我们介绍了利用最近的光致脱落截面测量结果计算电离层 D 层负离子光致脱落率的结果。计算是通过 TUV(Terrestrial UltraViolet)代码对标准大气层进行的。我们得到了光脱附率与海拔高度和太阳天顶角的关系。与中层大气和电离层下部的其他过程相比,这些非线性性质导致光脱附过程的作用随高度和太阳天顶角而发生类似变化,尤其是在终结者条件下。利用 2011-2020 年夏至/冬至和春分/秋分的太阳光谱进行的计算表明,电离层 D 层离子的光脱附速率没有数量上的差异。