A New Model for the Response of the Plasmasphere to Time- and Spatially-Varying Magnetospheric Convection Electric Fields

等离子体层对时空变化磁层对流电场响应的新模型

• 批准号: 9116858
• 负责人: Craig Rasmussen
• 金额: $ 8.65万
• 依托单位: Regents of the University of Michigan - Ann Arbor
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1992
• 资助国家: 美国
• 起止时间: 1992-08-01 至 1995-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9116858&HistoricalAwards=false
• 关键词: New; Model; Response; Plasmasphere; Time

We propose to model the temporal evolution of the large-scale density structures of the plasmasphere as they are created and controlled by the dynamics of refilling and convection. These structures are a prominent features appearing in measurements of the plasmasphere and will be theoretically examined with a two- dimensional plasmaspheric model ıRasmussen et al., 1990! patterned after Chen and Wolf ı1972!. Our approach will be to parametrically study plasmaspheric features created by a variety of temporally- and spatially-varying electric fields and to compare these features with recent measurements of the plasmasphere. Areas of specific interest are the two-dimensional structure of regions of relatively dense plasma, which appear to be detached from the main body of the plasmasphere when seen from the perspective of an orbiting satellite, as well as the creation of various characteristic plasmaspheric density profiles ısee Horwitz et al., 1990!. This modeling study is, in part, motivated by new observations of structures in the plasmasphere ıe.g., Carpenter et al., 1990; Horwitz et al., 1990; Anderson et al., 1990!.

我们建议模拟大规模的时间演化 等离子体的密度结构，因为它们被创建， 由再填充和对流的动力学控制。 这些 结构是一个突出的特点，出现在测量 等离子体，并将在理论上检查与两个- 三维等离子体层模型<$Rasmussen等人，1990年！图案化 1972年陈和沃尔夫之后！ 我们的方法是参数化地 研究等离子体层的特征， 和空间变化的电场，并比较这些特征 最近对等离子体的测量 具体领域 感兴趣的是区域的二维结构， 稠密的等离子体，似乎是从主体分离的， 从轨道上看， 卫星，以及创造各种特色， 等离子体密度分布参见Horwitz等人，1990年！。 这 建模研究的部分动机是新的观察， 等离子体中的结构例如，Carpenter等人，1990年; Horwitz等人，1990;安德森等人，1990年！