Laboratory Studies of Chemical Kinetic and Spectroscopic Processes Required for the Quantification of Mesospheric Sodium Nightglow and Nighttime Ozone Concentrations

中层钠夜光和夜间臭氧浓度定量所需的化学动力学和光谱过程的实验室研究

• 批准号: 9304528
• 负责人: Charles Kolb
• 金额: $ 34.52万
• 依托单位: Aerodyne Research Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-15 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9304528&HistoricalAwards=false
• 关键词: Laboratory; Studies; Chemical; Kinetic; Spectroscopic

The proposed work will measure reaction rate constants, product branching ratios and spectrcospic rate parameters which must be further quantified in order to reliably model the sodium nightglow and to unequivocally utilize simultaneous measurements of sodium nightglow emissions and ground state sodium concentrations to quantify nighttime upper mesospheric ozone levels. The low temperature NaO+O(3P) reaction, a secondary source of mesospheric NaO, will also be investigated. These experimental investigations will utilize temperature variable fast flow kinetic technique and crossed molecular beam methods, both coupled to high resolution tunable laser probes for spectroscopic state identification and characterization. Their successful completion will allow a much more experimentally grounded modeling effort to quantify the mesospheric Na nightglow and more firmly anchor recent attempts to use measured nightglow levels coupled with lidar measurements of atomic sodium density to deduce nighttime concentrations of upper mesospheric O3.

拟议的工作将测量反应速率常数、产物分支比和光谱速率参数，必须进一步量化这些参数，以便可靠地模拟钠夜辉，并明确利用钠夜辉发射和基态钠浓度的同时测量来量化夜间中间层上层臭氧水平。低温NaO+O(3P)反应是中层NAO的次要来源，也将被研究。这些实验研究将利用温度可变的快速流动动力学技术和交叉分子束方法，这两种方法都与高分辨率可调谐激光探针相耦合，用于光谱状态的识别和表征。它们的成功完成将使更多以实验为基础的建模工作能够量化中层Na夜光，并更坚定地支持最近使用测量的夜光水平与钠原子密度的激光雷达测量相结合来推断中间层上层臭氧夜间浓度的尝试。