Theoretical Studies of Solar Wind-Magnetosphere-Ionosphere Coupling on Intermediate Scales

中尺度太阳风-磁层-电离层耦合的理论研究

• 批准号: 9115465
• 负责人: Robert Lysak
• 金额: $ 19.45万
• 依托单位: University of Minnesota-Twin Cities
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-04-15 至 1997-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9115465&HistoricalAwards=false
• 关键词: Theoretical; Studies; Solar; Wind; Magnetosphere

A study of the intermediate scale, time-dependent coupling of the solar wind, magnetosphere and ionosphere is proposed. Such a study will allow for a detailed investigation of how energy, momentum and mass is transferred from the solar wind across the magnetopause, into the magnetosphere, and along auroral field lines into the ionosphere. Both analytic and numerical techniques will be used to describe the dynamics of localized reconnection at the magnetopause, and the relation of reconnection to the impulsive penetration of plasma and to the response of the magnetopause to dynamic pressure perturbations in the solar wind. A previously developed numerical model will be used to describe the global response of the magnetosphere to driving perturbations at the magnetopause. On a more localized scale, a three-dimensional model is being developed to describe the detailed interaction of auroral currents with the ionosphere. This model, along with accompanying analytic theory, will be used to describe the trapping of Alfven waves in the cavity formed by the sharp increase of the Alfven speed above the ionosphere. The overall goal of this research program is the understanding and modeling of the plasma processes which couple energy from the solar wind to the ionosphere.

中尺度时变耦合的研究 太阳风、磁层和电离层。 这种研究 将允许详细研究能量，动量和 质量从太阳风穿过磁层顶转移， 进入磁层，并沿着极光场线进入 电离层 分析和数值技术都将用于 描述了局部重联的动力学， 磁层顶，以及重联与脉冲的关系 穿透等离子体和磁层顶的响应， 太阳风中的动态压力扰动。 先前 发展的数值模式将被用来描述全球 磁层对驱动扰动的响应 磁层顶 在更局部的尺度上，一个三维模型 用来描述极光与大气层之间 电离层的电流 这种模式，沿着 分析理论，将被用来描述捕获阿尔芬 由Alfven的急剧增加形成的空腔中的波 电离层上方的速度。 本研究的总体目标是 程序是等离子体过程的理解和建模 将太阳风的能量耦合到电离层。