Theoretical Studies of Dynamical Processes in the Ionosphere

电离层动力学过程的理论研究

• 批准号: 9612638
• 负责人: Robert Schunk
• 金额: $ 46.5万
• 依托单位: Utah State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-12-15 至 1999-11-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9612638&HistoricalAwards=false
• 关键词: Theoretical; Studies; Dynamical; Processes; Ionosphere

This project continues studying the theoretical effects that plasma and neutral gas transport processes have on the ionosphere. Spanning three years, this research involves model/data comparisons, theoretical studies of ionospheric dynamics and electrodynamics, polar wind studies, and high-resolution thermosphere studies. The PI will consider the ionosphere as an integrated system, interacting with both the magnetosphere and thermosphere. Almost all of the major ionospheric regions will be studied: E-region, F-region, and topside ionosphere at equatorial, middle and high latitudes. Using mainly current models, the PI will use data from several ionosondes, incoherent scatter radars and satellites. Specifically, the research involves: (1) modeling/data comparisons in support of the CEDAR/PRIMO initiative to explain storm enhanced densities, model the plasma density cliff observed in the southern hemisphere, and validate the predicted climatology for the topside F-region; (2) modeling ionospheric dynamics studies, emphasizing global ionospheric response to gravity waves, problems associated with coupling global ionospheric and MHD magnetospheric models, and interpretation of incoherent scatter radar spectra with neutral networks when ion distributions are non-Maxwellian; (3) studying ionospheric electrodynamics of polar cap arcs, emphasizing on the cross-flow and time delay associated with the formation and decay of arcs; and (4) studying polar wind the effects of centrifugal acceleration, polar rain electrons, precipitating magnetospheric ions, and ionospheric molecular ions on temporal behavior of the flow; and (5) studying the high-resolution thermospheric response to flux-transfer events, with consequent cusp convection jets and plasma patch formation.

该项目继续研究血浆和中性气体传输过程对电离层的理论效应。 跨越三年的研究，该研究涉及模型/数据比较，电离层动力学和电动力学，极风研究和高分辨率热圈研究的理论研究。 PI将将电离层视为一个集成系统，与磁层和热层相互作用。 将研究几乎所有主要的电离层区域：在赤道，中间和高纬度处的电子区域，F区和顶部电离层。 PI主要使用当前模型，将使用来自几个Ionosondes，不一致的散点雷达和卫星的数据。 具体而言，该研究涉及：（1）建模/数据比较，以支持Cedar/Primo倡议来解释风暴增强的密度，对南半球观察到的血浆密度悬崖进行建模，并验证顶层F-Regregion的预测气候； （2）对电离层动力学研究进行建模，强调全球电离层对重力波的反应，与全球电离层和MHD磁层模型相关的问题，以及当离子分布是非Maxwellian时，与中性网络的不相互分散射雷达光谱的解释； （3）研究极性盖弧的电离层电动力学，强调与弧的形成和衰减相关的跨流和时间延迟； （4）研究极风，离心加速度，极性雨电子，沉淀磁层离子和电离层分子离子对流动时间行为的影响； （5）研究对通量转移事件的高分辨率热圈响应，从而导致尖锐的对流射流和血浆斑块形成。