Storm-Time Magnetospheric Dynamic Processes: Periodic Substorms, Sawtooth Oscillations, and Steady Magnetospheric Convection

风暴期间磁层动态过程：周期性亚暴、锯齿振荡和稳定磁层对流

• 批准号: 0642955
• 负责人: John Foster
• 金额: --
• 依托单位: Massachusetts Institute of Technology
• 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: 2008-03-01 至 2008-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0642955&HistoricalAwards=false
• 关键词: Storm; Time; Magnetospheric; Dynamic; Processes

This project will examine the state of the magnetosphere during periods when quasi-periodic substorms, sawtooth events and steady magnetospheric convection are occurring. The project will examine four specific questions. The first topic is to generate a statistical study that will determine the magnetospheric state that leads to substorms, including periodic substorms and sawtooth events, that occur within major magnetic storms. The state of the magnetosphere will be defined in terms of the lobe magnetic field and the plasma sheet pressure. The second topic is to establish a quantitative relationship between the solar wind state and the onset of magnetospheric substorms. The third topic will use data from a variety of satellites, especially the Geotail satellite, to relate the solar wind state to the magnetospheric state during periods of steady magnetospheric convection. The fourth topic will be to determine whether or not steady magnetospheric convection represents a smooth transition from substorms when the solar wind driver becomes weak.

该项目将研究准周期亚暴、锯齿事件和稳定的磁层对流发生期间磁层的状态。该项目将研究四个具体问题。第一个主题是产生一项统计研究，以确定导致亚暴的磁层状态，包括发生在主要磁暴中的周期性亚暴和锯齿事件。磁层的状态将根据波瓣磁场和等离子体片压力来定义。第二个主题是建立太阳风状态和磁层亚暴爆发之间的定量关系。第三个专题将使用各种卫星，特别是GeoTail卫星的数据，将太阳风状态与稳定磁层对流期间的磁层状态联系起来。第四个主题将是确定稳定的磁层对流是否代表在太阳风驱动变弱时从亚暴平稳过渡。