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

该项目的目的是通过数值模拟和与卫星观测的比较来研究由精灵引起的化学扰动。直到最近，还没有测量单个精灵的化学影响。SMILES仪器对中间层HO2增强的检测是对化学精灵效应的第一次直接观察，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。以前关于这一主题的几乎所有模式研究都使用箱形模式（仅限化学，忽略任何大气输送）。由于SMILES测量是在精灵事件发生后1.5至4.5小时之间进行的，并且距离精灵位置20至180公里，因此有必要进行化学传输模拟，以便与观测结果进行定量比较。将开发一个精灵化学和传输模型，并用于模拟与SMILES测量相对应的精灵。将与Kasai靖子教授（东京工业大学）的工作组合作进行模型测量比较。

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).