Solar Wind-Magnetosphere-Ionosphere Coupling

太阳风-磁层-电离层耦合

• 批准号: 0809307
• 负责人: George Siscoe
• 金额: $ 29.74万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2008
• 资助国家: 美国
• 起止时间: 2008-11-01 至 2012-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0809307&HistoricalAwards=false
• 关键词: Solar; Wind; Magnetosphere; Ionosphere; Coupling

One of the unifying concepts of space (and astrophysical) plasma science is that of explosive energy conversions (EPCs). This project is a systematic attempt to uncover a universal process underlying the occurrence of EPCs through a comparative study of its most well known examples: coronal mass ejections and magnetospheric substorms. One potential candidate for such a universal process is the loss of equilibrium between repulsive and attractive forces operating on a magnetic bubble. A tail-like configuration forms, creating a "champagne-glass" magnetic structure. The investigation will use three different, global, MHD simulation models available at the Community Coordinated Modeling Center (CCMC) to simulate substorms and test whether the loss of equilibrium signature is present. If the signature is present then the simulations will be used to determine how the evolution of the magnetosphere under suitable solar wind conditions leads to the emergence of the loss of equilibrium. The use of three different and independent MHD codes will be used to test the robustness of the result.A second goal is coupled with the basic research effort. The simulation results will be used to construct a comprehensive set of unit lessons in basic solar-terrestrial physics. The lessons will be routinely updated through growth and user feedback and will be accessible interactively through the CCMC web site.

空间（和天体物理学）等离子体科学的统一概念之一是爆炸能量转换（EPCs）。这个项目是一个系统的尝试，通过对其最著名的例子：日冕物质抛射和磁层亚暴的比较研究，揭示EPCs发生的普遍过程。这种普遍过程的一个潜在候选者是作用在磁泡上的斥力和引力失去平衡。形成一个尾巴状的结构，形成一个“香槟杯”的磁性结构。该研究将使用社区协调建模中心（CCMC）提供的三种不同的全球MHD模拟模型来模拟亚暴，并测试是否存在平衡特征的损失。如果该特征存在，那么模拟将用于确定在合适的太阳风条件下磁层的演变如何导致平衡丧失的出现。使用三个不同的和独立的MHD代码将被用来测试结果的鲁棒性。第二个目标与基础研究工作相结合。模拟结果将用于构建一套全面的基本日地物理单元课程。这些课程将通过增长和用户反馈定期更新，并将通过CCMC网站交互式地提供。