Modelling atmospheric effects of electrical discharges

模拟放电的大气效应

• 批准号: 496872622
• 负责人: Professor Dr. Justus Notholt
• 金额: --
• 依托单位: Abteilung für Erdfernerkundung
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2022
• 资助国家: 德国
• 起止时间: 2021-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/496872622?language=en
• 关键词: Modelling; atmospheric; effects; electrical; discharges

Lightning is known to be an important source of nitrogen radicals in the troposphere, and this is taken into account in many atmospheric chemistry and climate chemistry models. Recent measurements have shown that there is also significant production of hydrogen radicals (HOx) in electrified clouds. This production has been attributed to weak subvisible electrical discharges. Both the formation mechanism of HOx in electrified clouds as well as the atmospheric impacts are hardly investigated. The aim of this project is to study the impacts of weak electrical discharges on reactive hydrogen species and other trace gases in the Earth's atmosphere. For this purpose, a plasma chemistry model will be used. Model simulations will be carried out for a comparison with laboratory measurements, and for an analysis of the impact of hydrometeor discharges in electrified clouds. Additionally, the model will be used to investigate the chemical effects of weak electrical discharges at higher altitudes, as there are significant discrepancy between measured and modelled HOx enhancements over active thunderstorms. Furthermore, an atmospheric chemistry and transport model will be used to study the global impact of HOx production in electrified clouds.

已知闪电是对流层中氮自由基的重要来源，并且在许多大气化学和气候化学模型中都考虑到这一点。最近的测量结果表明，电气云中也有大量产生的氢自由基（HOX）。该产量归因于弱的亚凝结电放电。几乎没有研究电气云中HOX的形成机理以及大气影响。该项目的目的是研究弱电排放对反应性氢物质和地球大气中其他痕量气体的影响。为此，将使用血浆化学模型。将进行模型模拟与实验室测量进行比较，并分析水力久远的电气云中的影响。此外，该模型将用于研究较高高度的弱电排放的化学作用，因为测得的HOX增强和模型的HOX在主动雷暴中的增强之间存在显着差异。此外，将使用大气化学和运输模型来研究电气云中HOX产生的全球影响。