Model studies on chemical effects of sprites in the mesosphere in relation with satellite measurements

与卫星测量相关的中间层精灵化学效应的模型研究

• 批准号: 396772248
• 负责人: Dr. Holger Winkler
• 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: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/396772248?language=en
• 关键词: Model; studies; chemical; effects; sprites

The aim of this project is to investigate chemical perturbations due to sprites by means of numerical modelling, and comparisons with satellite observations. Until recently, there were no measurements of the chemical impact of single sprites. The detection of mesospheric HO2 enhancements by the SMILES instrument are the first direct observations of chemical sprite effects, and provide a unique opportunity to test our understanding of the chemical processes in sprites. Almost all previous model studies on this topic used box models (chemistry only, neglecting any atmospheric transport). As the SMILES measurements are taken between 1.5 and 4.5 hours after the sprite events, and at distances of 20 to 180 km from the sprite locations, it will be necessary to perform chemistry-transport simulations in order to quantitatively compare with the observations. A sprite chemistry and transport model will be developed, and used to simulate sprites corresponding to the SMILES measurements. A model-measurement comparison will be carried out in collaboration with the working group of Professor Yasuko Kasai (Tokyo Institute of Technology).

该项目的目的是通过数值模拟和与卫星观测结果的比较，研究由精灵引起的化学扰动。直到最近，还没有对单个精灵的化学影响进行测量。SMILES仪器对中间层HO 2增强的探测是对化学精灵效应的首次直接观测，并提供了一个独特的机会来测试我们对精灵中化学过程的理解。几乎所有以前关于这一主题的模型研究都使用箱式模型（仅化学，忽略任何大气迁移）。由于SMILES测量是在雪碧事件发生后1.5至4.5小时之间进行的，距离雪碧地点20至180公里，因此有必要进行化学输运模拟，以便与观测进行定量比较。一个精灵化学和运输模型将被开发，并用于模拟精灵对应的SMILES测量。将与Yasuko加塞教授（东京工业大学）的工作组合作，进行一次模型-测量比较。

项目成果

HO2 enhancements due to sprite discharges - observations and model simulations

由于精灵放电而导致 HO2 增强 - 观察和模型模拟

• DOI: 10.5194/egusphere-egu2020-8313
• 发表时间: 2020
• 作者: H. Winkler;T. Yamada;Y. Kasai;J. Notholt
• 通讯作者: J. Notholt