M-I Coupling: Modeling of Kinetic Instabilities Relevant to I-M Coupling Using a Multi-Scale Model and Parameterization of Results that can be Used in Global Models

M-I 耦合：使用多尺度模型对与 I-M 耦合相关的动力学不稳定性进行建模，并对可在全局模型中使用的结果进行参数化

• 批准号: 0101925
• 负责人: Supriya Banerjee
• 金额: $ 17.99万
• 依托单位: Leidos, Inc.
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-01 至 2006-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0101925&HistoricalAwards=false
• 关键词: Coupling; Modeling; Kinetic; Instabilities; Relevant

Field-aligned currents play an important role in magnetosphere-Ionosphere (M-I) coupling. These currents can act as the source of free energy for a number of kinetic instabilities which lead to plasma energization. The instabilities may also lead to the formation of plasma density cavities or enhancements, and these in turn play a role in the escape of heavy ions from the ionosphere. All of these factors affect plasma transport properties in the M-I system, and the high latitude ionospheric plasma must also respond to both magnetospheric and corotational electric fields. This study will examine the role of kinetic instabilities to M-I coupling and plasma transport processes. A multi-scale model will be used to generate simulations which can be incorporated in other global models, such as those used in space weather research and forecasting.

场向电流在磁层-电离层耦合中起着重要作用。 这些电流可以作为自由能的来源，用于导致等离子体放电的许多动力学不稳定性。 这些不稳定性也可能导致等离子体密度空洞或增强的形成，而这些又在重离子从电离层逃逸中发挥作用。 所有这些因素都影响着M-I系统中等离子体的输运特性，高纬电离层等离子体还必须对磁层电场和共转电场做出响应。 本研究将探讨动力学不稳定性对M-I耦合和等离子体输运过程的作用。 将使用一个多尺度模型生成模拟，这些模拟可纳入其他全球模型，如空间气象研究和预测所用的模型。