Continuing Theoretical Studies of Dynamical Processes in the Ionosphere

电离层动力学过程的持续理论研究

• 批准号: 1441774
• 负责人: Robert Schunk
• 金额: $ 30万
• 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: 2015
• 资助国家: 美国
• 起止时间: 2015-07-01 至 2019-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1441774&HistoricalAwards=false
• 关键词: Continuing; Theoretical; Studies; Dynamical; Processes

Changes in the upper atmosphere and in its ionized part (ionosphere) can be detrimental to human activities. They can affect satellite drag, which in turn affects satellite lifetimes. Short term changes can lead the formation of storm-enhanced densities, rising atmospheric bubbles, solar flare-induced ionization enhancements, and propagating atmospheric holes and plasma patches. These upper atmospheric disturbances have adverse effects on GPS navigation systems, power grids, over-the-horizon radar systems, and High Frequency (HF) communications used by the military, emergency responders, and airlines. This research is focused on elucidating the physics that governs these processes, leading to improved specification and forecast models, and better mitigation strategies for adverse upper atmosphere weather disturbances. Space 'climate' studies will involve the use of long-duration radar and satellite datasets and model studies to determine the reasons for long-term upper atmosphere changes. The primary goals of this research are to study the effects that various plasma and neutral gas transport processes have on the ionosphere-thermosphere system, and to study coupling mechanisms that are relevant to the near-Earth space environment. The research involves an extensive use of data from NSF-funded and other ground-based facilities and satellites, including data from Incoherent Scatter Radars [Arecibo, Millstone Hill, Poker Flat (PFISR), Resolute Bay (RISR) and EISCAT], SuperDARN radars, ionosondes, and satellites (DMSP, ACE and SDO). The research will be conducted with the aid of high-resolution, global-scale, physics-based models of the ionosphere, thermosphere, and electrodynamics. The project will focus on long-term ionospheric changes and observation and modeling of the space-atmosphere interaction region.

上层大气及其离子化部分（电离层）的变化可能不利于人类活动。它们会影响卫星阻力，这反过来会影响卫星的寿命。短期变化可以导致形成风暴增强的密度，大气气泡上升，太阳耀斑诱导的电离增强功能以​​及传播大气孔和血浆斑块的形成。这些大气上的干扰对GPS导航系统，电网，胜利雷达系统以及军事，应急人员和航空公司使用的高频（HF）通信产生不利影响。这项研究的重点是阐明控制这些过程的物理学，从而改善了规范和预测模型，并为不利的上层气氛天气障碍提供了更好的缓解策略。空间“气候”研究将涉及长期雷达和卫星数据集的使用以及模型研究以确定长期大气变化的原因。这项研究的主要目标是研究各种等离子体和中性气体传输过程对电离层 - 热层系统的影响，并研究与近地太空环境相关的耦合机制。这项研究涉及来自NSF资助和其他基于基础的设施和卫星的数据，包括来自Incoherent Scatter Radars [Arecibo，Millstone Hill，Poker Flat（PFISR），Resolute Bay（Risr）和Eiscat]和Eiscat]，Superdarn Radars，Ionosondes，Ionosondes，Ionosondes，Ionosondes，Ionosondes和Sce（DMSP，ACE和SDO）。这项研究将借助高分辨率，全球规模的基于物理学的模型的电离层，热层和电动力学模型进行。该项目将集中于长期的电离层变化以及空间 - 大气相互作用区域的观察和建模。