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

合作研究：CEDAR——在阿雷西博使用同步和通用体积多激光雷达和雷达测量进行金属原子和离子浓度的相关研究

• 批准号: 1243063
• 负责人: Shikha Raizada
• 金额: $ 16.06万
• 依托单位: SRI International
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-05-01 至 2017-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1243063&HistoricalAwards=false
• 关键词: Collaborative; Research; CEDAR; Correlative; Study

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.

研究人员将利用现有和新的数据对中间层和低热层的化学和动力学进行全面研究。这些任务包括开发新的雷达能力来测量夜间Fe+浓度，以及增强激光雷达的温度和风测量能力。目标是描述原子金属和电子浓度之间的关系，通过同步观测比较MLT中流星物种的化学性质，并调查金属层对重力波和潮汐的响应。在过去的二十年中，已经有一些同时和共同的体积观测的流星物种，包括，钙，铁，钾，钠，钙+，以及电子浓度（Ne）和温度在中层顶区在阿雷西博。同时观测多个物种的优点是大气条件相同。通过预期的Fe+雷达测量，观测结果将允许对离子分子和神经分子化学进行比较研究。此外，动力学与化学输送的影响及其随高度的变化将进行研究。这项研究将有助于建立大气模型，并增进对中间层化学和动力学的了解。它将涉及来自迈阿密大学的研究生和本科生，以及来自波多黎各大学的学生，并将加强与至少两个其他国家的科学家的国际合作。预计这些结果将有助于改进更广泛的大气界使用的大气模型。