Model studies on vibrationally-rotationally excited hydroxyl molecules in the mesosphere and rotational temperatures

中间层振动旋转激发羟基分子和旋转温度的模型研究

• 批准号: 392888112
• 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: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/392888112?language=en
• 关键词: Model; studies; vibrationally; rotationally; excited

One of the standard methods to remotely sense the temperature of the mesopause region is based on spectroscopic measurements of the rotational temperatures of hydroxyl molecules. For the interpretation of the retrieved rotational temperatures, the aspect of rotational thermalization is of great importance. However, there is only a very limited number of studies on this topic. The aim of this project is to investigate rotationally-vibrationally excited OH molecules of the hydroxyl airglow layer in the upper mesosphere/lower thermosphere. For this purpose, a first-principle kinetic model of vibrationally-rotationally excited hydroxyl molecules will be developed. The model will be used to simulate concentrations of excited hydroxyl molecules and emission rates at different altitudes and for different atmospheric conditions. In particular, the rotational state distributions will be analyzed to assess deviations from local thermodynamic equilibrium. The model results will be compared to ground-based and satellite measurements.

遥感中层顶区域温度的标准方法之一是基于对羟基分子旋转温度的光谱测量。为了解释反演的旋转温度，旋转热化方面是非常重要的。然而，关于这一主题的研究数量非常有限。该项目的目的是研究在上层中间层/低热层中羟基气辉层的旋转振动激发的OH分子。为此，将开发振动-旋转激发的羟基分子的第一原理动力学模型。该模型将用于模拟不同高度和不同大气条件下的激发羟基分子浓度和排放率。特别是，旋转状态分布将进行分析，以评估偏离局部热力学平衡。模型结果将与地面和卫星测量结果进行比较。

项目成果

Model studies on vibrationally-rotationally excited hydroxyl molecules in the mesopause region

中层顶区域振动旋转激发羟基分子的模型研究

• DOI: 10.5194/egusphere-egu2020-15350
• 发表时间: 2020
• 作者: J. Notholt;H. Winkler;S. Noll
• 通讯作者: S. Noll

OH level populations and accuracies of Einstein-A coefficients from hundreds of measured lines

• DOI: 10.5194/acp-20-5269-2020
• 发表时间: 2019-12
• 期刊: Atmospheric Chemistry and Physics
• 影响因子: 6.3
• 作者: S. Noll;H. Winkler;O. Goussev;B. Proxauf