AGS-PRF: Improving Global Simulations of Odd Nitrogen in the Middle and Upper Atmosphere

该项目将提高热层电离层电动力学全球环流模型（TIE-GCM）和全大气层群落气候模型（WACCM-X）的热层扩展模拟中高层大气奇数氮，特别是一氧化氮（NO）的能力。 这些模型所使用的相关NO化学方案需要根据实验室测量的最新改进在速率系数和量子产率方面进行重大更新。 赤道NO的TIE-GCM模拟与观测结果比较差。 来自学生一氧化氮探测器（SNOE）数据的数据将用于在改进实验室结果的剩余不确定性内调整模型化学。 将评估修改后的NO化学对模拟风、温度、能量学和次要物种的影响。 准确预测热层奇氮是至关重要的，因为它影响热层温度和密度对太阳周期和风暴的反应。 广泛传播的GLOW模型的一个版本，包括这些更新的参数和过程将有利于社区，而在TIE-GCM和WACCM-X中实施修订的NO化学将能够更准确地模拟热层NO变化的影响。 除研究外，还将开展面向大学生和高中生的外联活动。

This project will improve the ability of the Thermosphere Ionosphere Electrodynamics Global Circulation Model (TIE-GCM) and the thermospheric extension of the Whole Atmosphere Community Climate Model (WACCM-X) to simulate middle and upper atmospheric odd nitrogen, specifically nitric oxide (NO). The relevant NO chemistry scheme used by these models needs significant updates in rate coefficient and quantum yields based on recent improvements in laboratory measurements. TIE-GCM simulations of equatorial NO compare poorly with observations. Data from the Student Nitric Oxide Explorer (SNOE) data will be used to tune the model chemistry within the remaining uncertainties of the improved lab results. The effect of the modified NO chemistry on simulated winds, temperature, energetics, and minor species will be evaluated. Accurate prediction of thermospheric odd nitrogen is crucial, as it influences the response of the thermosphere temperature and density to solar cycles and storms. A version of the widely circulated GLOW model including these updated parameters and processes will be of benefit to the community while implementation of the revised NO chemistry in TIE-GCM and WACCM-X will enable more accurate simulation of the impacts of thermospheric NO variations. In addition to the research, outreach activities to college and high school students will be carried out.