Lidar and Modeling Studies of Constituent Fluxes by Dissipating Gravity Waves in the Mesopause Region

中层顶区域耗散重力波的激光雷达和成分通量模拟研究

• 批准号: 1049451
• 负责人: Alan Liu
• 金额: $ 17.28万
• 依托单位: Embry-Riddle Aeronautical University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-07-16 至 2014-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1049451&HistoricalAwards=false
• 关键词: Lidar; Modeling; Studies; Constituent; Fluxes

This project is an investigation of the dynamical transport by dissipating gravity waves and their impact on the vertical constituent structure in the mesopause region, using lidar observations and chemical models. To quantify the effects of dynamical transport, the University of Leeds chemical models of mesospheric Na and other minor constituents will be modified to include the vertical dynamical transport estimated from Na wind/temperature lidar measurements. The simulations of these modified models will then be compared with the extensive sodium lidar measurements that were conducted throughout the year at the Starfire Optical Range in New Mexico (SOR, Na, temperature, and flux observations) and Maui Space Surveillance System, in Hawaii (MSSS, Na, temperature, and flux observations). This work will be done in collaboration with Professor John M. C. Plane and his group at the University of Leeds. The objectives are to obtain quantitative estimates of vertical dynamical fluxes of various constituents, and compare their effects on the vertical distribution and chemistry of these constituents. The key scientific goals of this research are: 1) to verify the theoretical relationship between the vertical heat and constituent fluxes by analyzing the seasonal variations of the measured heat and Na fluxes at SOR and MSSS; 2) to upgrade the University of Leeds chemical models of mesospheric constituents to include the significant affects of GW transport by employing the relationships between heat and constituent fluxes; 3) to quantify the relative influence of GW flux on the seasonal variations of the structure of the mesospheric Na layer by comparing model predictions with observations; 4) to estimate the seasonal variations of the eddy diffusion coefficient profile between 80 and 105 km by tuning the Na model to reproduce the lidar observations at SOR and MSSS; 5) to assess the influence of GW transport on the structure of other important mesospheric constituents such as odd O and odd H. The project includes the participation of a post-doctoral researcher and a graduate student, who will gain experience in research on middle atmospheric dynamics and chemistry, engineering techniques in remote sensing, and signal processing.

该项目是通过使用LIDAR观测和化学模型来调查通过消散重力波及其对间膜区域垂直组成结构的影响的研究。为了量化动力运输的影响，将修改利兹大学的中层NA和其他次要成分的化学模型，以包括根据NA风/温度激光痛测量值估算的垂直动力传输。然后，将将这些改良模型的模拟与全年在新墨西哥州的星际火范围（SOR，NA，温度和通量观察）和毛伊岛的空间监视系统（MSS，NA，NA，NA，NA，温度和温度观察）进行比较。 这项工作将与约翰·M·C·布莱斯教授及其小组合作完成。这些目标是获得各种成分垂直动力通量的定量估计，并比较它们对这些成分垂直分布和化学的影响。这项研究的主要科学目标是：1）通过分析SOR和MSSS的测得的热量和Na通量的季节性变化来验证垂直热和组成通量之间的理论关系； 2）通过利用热量与成分通量之间的关系，将利兹大学化学模型升级，包括GW运输的重大影响； 3）通过将模型预测与观测值进行比较，量化GW通量对中层NA层结构季节性变化的相对影响； 4）通过调整Na模型以重现SOR和MSSS处的LIDAR观测值，估算80至105 km之间涡流扩散系数的季节变化； 5）评估GW运输对其他重要的中层成分的结构（例如ODD O和ODD H）的影响。该项目包括专业后研究人员和研究生的参与，他们将在中间大气动力学和化学方面的研究经验，工程技术，遥感和信号处理方面的工程技术。