M-I Coupling: Study of Magnetospheric Dynamics with Ionospheric Outflows

M-I 耦合：具有电离层流出的磁层动力学研究

• 批准号: 0353058
• 负责人: Kenichi Nishikawa
• 金额: --
• 依托单位: University of Alabama in Huntsville
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2002
• 资助国家: 美国
• 起止时间: 2002-11-01 至 2007-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0353058&HistoricalAwards=false
• 关键词: Coupling; Study; Magnetospheric; Dynamics; Ionospheric

The effects of outflowing ionospheric ions on the dynamics of the magnetosphere is an inherently very difficult problem to study. A natural way of studying such phenomena is to utilize kinetic particle simulations. The difficulty in doing such simulations has been the large amounts of computer time required to generate physically reasonable results. New version of the EMPM (Electromagnetic Particle Model) code has been developed to make use of the capabilities of massively parallel computers such as the ORIGIN 2000 or the Cray T3E. This new code will provide a factor of two improvement in spatial resolution over the previous code and will provide better dynamics of the inner magnetosphere and ring current.Ionopsheric models of outflowing heavy ions will be used to incorporate the injection of these ions into the magnetosphere. The EMPM code will then be used to study the dynamics of magnetic storms as affected by the presence of heavy ions. In particular, the effect of changes in the interplanetary magnetic field (IMF) will be investigated. This will be done using simplified time-varying IMFs to determine the effect of the varying IMF on the M-I coupling due to overflow of ionospheric ions.

外流电离层离子对磁层动力学的影响是一个很难研究的问题。 研究这种现象的一种自然方法是利用动力学粒子模拟。 进行这种模拟的困难在于需要大量的计算机时间来产生物理上合理的结果。 新版本的电磁粒子模型（EMPM）代码已经开发出来，以利用大规模并行计算机的能力，如ORIGIN 2000或Cray T3 E。 这个新的代码将提供一个因素的空间分辨率比以前的代码提高了一倍，并将提供更好的动态的内磁层和环电流，离子层模型流出的重离子将被用来将这些离子注入到磁层。 然后，EPPM代码将用于研究重离子存在时磁暴的动力学。 特别是，将研究行星际磁场（IMF）变化的影响。 这将使用简化的时变IMF来确定由于电离层离子溢出而引起的变化IMF对M-I耦合的影响。