Collaborative Research: CEDAR--Correlative Study of Metal Atoms and Ion Concentrations Using Simultaneous and Common Volume Multi-lidar and Radar Measurements at Arecibo

研究人员将利用现有和新的数据对中间层和低热层(MLT)的化学和动力学进行全面研究。这些任务包括开发一种新的雷达能力来测量夜间铁浓度，以及增强激光雷达测量温度和风的能力。其目标是描述原子金属与电子浓度之间的关系，通过同时观测比较MLT中陨石物种的化学成分，并调查金属层对重力波和潮汐的响应。在过去的二十年里，在阿雷西博的中层顶区进行了许多同步和共同的体积观测，包括Ca、Fe、K、Na和Ca，以及电子浓度(Ne)和温度。同时观测多个物种的好处是大气条件是相同的。随着预期的铁的雷达测量，观测将允许对离子-分子和神经-分子化学进行比较研究。此外，还将研究动力输送与化学输送的影响及其随海拔的变化。这项研究将有助于开发大气模式，并增进对中间层化学和动力学的了解。它将涉及迈阿密大学的研究生和本科生，以及波多黎各大学的学生，并将加强与至少另外两个国家的科学家的国际合作。预计这一结果将有助于改进更广泛的大气社区使用的大气模型。

The investigators will conduct a comprehensive study of the chemistry and dynamics in the mesosphere and lower thermosphere (MLT) using existing and new data. The tasks include the development of a new radar capability to measure nighttime Fe+ concentrations, and enhanced lidar capabilities for temperature and wind measurements. The objectives are to characterize relationships among atomic metals and electron concentration, compare chemistries of meteoric species in MLT through simultaneous observations, and investigate the response of metal layers to gravity waves and tides. In the last two decades, there have been a number of simultaneous and common volume observations of meteoric species, including, Ca, Fe, K, Na, and Ca+, as well as electron concentration (Ne) and temperature in the mesopause region at Arecibo. The simultaneous observation of multiple species offers the advantage that the atmospheric conditions are identical. With the anticipated radar measurement of Fe+, the observations will allow for comparative studies on ion-molecular and neural-molecular chemistries. Also, the influence of dynamical versus chemical transport and its variation with the altitude will be investigated. The study will help in the development of atmospheric models and improve knowledge of mesospheric chemistry and dynamics. It will involve graduate and undergraduate students from Miami University, as well as students from universities in Puerto Rico, and will strengthen international collaborations with scientists from at least two other countries. The results are expected to help to improve atmospheric models used by the broader atmospheric community.