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

该项目将研究准周期性亚暴、锯齿状事件和稳定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个统计研究，将确定导致亚暴的磁层状态，包括周期性亚暴和锯齿状事件，发生在主要磁暴中。磁层的状态将根据叶状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与磁层亚暴发生之间的定量关系。第三个主题将使用来自各种卫星，特别是Geotail卫星的数据，将稳定磁层对流期间的太阳风状态与磁层状态联系起来。第四个主题将是确定当太阳风驱动变弱时，稳定的磁层对流是否代表从亚暴的平稳过渡。

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.