Model studies of hydroxyl airglow under the influence of ionization.

电离影响下羟基气辉的模型研究。

• 批准号: 251076469
• 负责人: Dr. Holger Winkler
• 金额: --
• 依托单位: The Pennsylvania State University (PennState)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2013
• 资助国家: 德国
• 起止时间: 2012-12-31 至 2016-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/251076469?language=en
• 关键词: Model; studies; hydroxyl; airglow; under

Emissions of vibrationally excited hydroxyl molecules OH* are useful indicators for dynamical and chemical processes in the terrestrial mesosphere. The response of OH* to sporadic ionization events provides an interesting opportunity to test our understanding of these chemical and dynamical processes. However, the observed perturbations of OH* emissions during ionization events are hardly understood. Solar particle events give rise to pronounced OH* emission disturbances which have not been reproduced by atmospheric models yet. Furthermore, the bright OH* emissions due to electric breakdown events above active thunderstorms are much stronger than the predictions of plasma chemistry simulations. The aim of this project is to investigate the effects of ionization on OH* in the mesosphere. For this purpose, existing ion and plasma chemistry models will be improved and used to study the chemical processes in detail. In particular, the proposed production of OH* through vibrationally excited nitrogen molecules in electric discharges will be considered. Additionally, the potential effect of temperature enhancements due to ionization events will be investigated. The model results will be compared to satellite observations of OH* emissions.

振动激发的羟基分子OH* 的排放是陆地中间层动力学和化学过程的有用指标。OH* 对偶发电离事件的响应提供了一个有趣的机会来测试我们对这些化学和动力学过程的理解。然而，电离过程中观察到的OH* 发射的扰动很难理解。太阳粒子事件引起了明显的OH* 排放扰动，这还没有被大气模型再现。此外，明亮的OH* 的排放量，由于以上活动的雷暴电击穿事件比等离子体化学模拟的预测强得多。该项目的目的是研究电离对中间层OH* 的影响。为此，现有的离子和等离子体化学模型将被改进，并用于详细研究化学过程。特别是，将考虑通过放电中的振动激发氮分子产生OH*。此外，由于电离事件的温度增强的潜在影响将进行调查。模型结果将与OH* 排放的卫星观测结果进行比较。