GEM: Why Does the Magnetosphere Enter a Steady Mode of Energy Transport Instead of an Oscillatory Mode?

该奖项是根据2009年《美国复苏和再投资法案》(公法111-5)资助的。该项目的目标是更好地了解稳定磁层对流(SMC)过程中涉及的磁层过程。这项研究有两个主要的科学目标，一是调查稳定的磁层对流事件期间爆发的块流的作用，二是调查为什么磁层进入稳定的能量转移模式，而不是振荡模式(“锯齿振荡”模式)。第二个目标将被分解为两个子组成部分，第一个子组成部分将比较具有BBF的活跃SMC与全球锯齿振荡。第二个组件将启动SMC的亚风暴与锯齿事件中的第一次注入进行比较。在调查主要目标之前，必须创建一种改进的、更健壮的方法来确定中小企业。将测试三种不同的方法。一旦选择了一种方法，就会生成一份SMC的综合清单。这份清单还将与地球空间环境建模(GEM)社区共享，以便其他人也可以调查这些事件，并将它们与其他能量转移模式进行比较。通过研究SMC的特定方面，并将它们与锯齿振荡进行比较，这项研究将增加对SMC以及磁层如何进入稳定状态的理解。虽然以前对SMC和其他磁层传输模式的研究主要集中在太阳风驱动因素上，但本项目将研究在确定磁层何时以及为什么进入不同的能量传输模式方面发挥作用的磁层参数。识别中小企业的新方法不仅将允许创建一个更全面的中小企业名单，而且还将有助于在未来找到中小企业。本次调查期间创建的SMC名单将与创业板社区共享。这份清单将有助于更深入地研究SMC事件，并将SMC与其他能源运输方式进行比较研究。

This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5).The goal of this project is to better understand the magnetospheric processes involved during steady magnetospheric convection (SMC). There are two main scientific objectives of the research, to investigate the role of bursty bulk flows (BBFs) during steady magnetospheric convection events (SMCs) and to investigate why the magnetosphere enters a steady mode of energy transfer instead of an oscillatory mode (the "sawtooth oscillation" mode). The second objective will be broken down into two sub-components, the first will compare active SMCs that have BBFs to global sawtooth oscillations. The second component will compare the substorm that initiates an SMC to the first injection in a sawtooth event. Before investigating the main objectives, an improved, more robust method for identifying SMCs must be created. Three different methods will be tested. Once a method is chosen, a comprehensive list of SMCs will be generated. This list will also be shared with the Geospace Environment Modeling (GEM) community so that others may also investigate the events and compare them to other modes of energy transfer. By studying specific aspects of SMCs and comparing them to sawtooth oscillations this research will increase the understanding of SMCs and how the magnetosphere enters into a steady state. While previous studies of SMCs and other modes of magnetospheric transport have focused mainly on the solar wind drivers, this project will study the magnetospheric parameters that play a role in determining when and why the magnetosphere enters into different modes of energy transfer. The new method for identifying SMCs will not only allow for a more comprehensive list of SMCs to be created, it will also help to find SMCs in the future. The list of SMCs created during this investigation will shared with the GEM community. This list will allow for more in-depth studies of SMC events and for comparative studies of SMCs to other modes of energy transport.