Dynamical Model of Stormtime Ring Current

风暴期环流动力学模型

• 批准号: 9522288
• 负责人: Margaret Chen
• 金额: $ 16万
• 依托单位: Aerospace Corporation
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-09-01 至 2000-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9522288&HistoricalAwards=false
• 关键词: Dynamical; Model; Stormtime; Ring; Current

This is a project to develop and use a dynamical model for studying the growth and decay of the stormtime ring current. The ring current is a complex region of the magnetosphere in which particle transport and loss, magnetic and electric fields, and plasma wave effects are critical processes. The investigators have developed a guiding center simulation model and a transport model of ring current ions the test the understanding of fundamental mechanisms involved in the formation of the stormtime ring current. The models are able to quantitatively account for the increase in energy content associated with magnetic storms. This study will build upon the existing model to gain a better understanding of the unresolved physical processes responsible for growth and decay of the ring current. The modeling efforts will determine the role of electrons, assess the stability of the ring current against ion cyclotron wave growth, investigate the role of the waves in ring current decay, and quantify the relative importance of ionospheric and solar wind plasmas in the ring current. The simulation results will be applied to observations obtained by the Combined Release and Radiation Effects Satellite.

这是一个开发和使用动态模型来研究风暴时环电流的增长和衰减的项目。环电流是磁层的一个复杂区域，其中粒子输运和损失、磁场和电场以及等离子体波效应是关键过程。研究人员开发了一个引导中心模拟模型和一个环电流离子输运模型，以测试对风暴时环电流形成的基本机制的理解。这些模型能够定量地解释与磁暴相关的能量含量的增加。这项研究将建立在现有模型的基础上，以更好地理解导致环电流增长和衰减的尚未解决的物理过程。建模工作将确定电子的作用，评估环电流对离子回旋波增长的稳定性，研究波在环电流衰减中的作用，并量化电离层和太阳风等离子体在环电流中的相对重要性。模拟结果将应用于释放与辐射效应联合卫星获得的观测结果。