Collaborative Research: GEM: System Study of the Plasmasphere in Solar Wind-Magnetosphere Coupling

合作研究：GEM：太阳风磁层耦合中等离子体层的系统研究

• 批准号: 1502436
• 负责人: Brian Walsh
• 金额: $ 12.41万
• 依托单位: Trustees of Boston University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-03-01 至 2020-02-29
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1502436&HistoricalAwards=false
• 关键词: Collaborative; Research; GEM; System; Study

The Geospace Environment Modeling (GEM) Program is a broad-based, community-initiated research program on the physics of the Earth's magnetosphere and the coupling of the magnetosphere to the atmosphere and to the solar wind. The work of GEM is accomplished in a series of campaigns and focus groups that solve specific problems leading to the construction of a global Geospace General Circulation Model (GGCM) with predictive capability. This project will contribute essential results to this goal pertaining to understanding the role of the magnetospheric plasma distribution and density in determining the efficiency of the solar wind-magnetosphere coupling. In addition, the project supports the development of independent research careers for two early-career space physics scientist. It also will offer educational opportunities for undergraduate students both at University of California Berkeley and University of Michigan Ann Arbor. The ultimate goal of this project is the development and validation of a global model capable of reproducing accurate plasmasphere dynamics and the self-consistent effects of the plasmasphere on the dayside reconnection rate and overall magnetopause dynamics. Utilizing existing state-of-the-art models, two different approaches for incorporating the plasmasphere in a global MHD model will be developed and evaluated using multipoint spacecraft measurements from the THEMIS, Van Allen Belts Probes, and LANL satellites missions. The best, and fully validated, approach will then be used to model three different storm events and measure the reconnection rates in a variety of ways with and without inclusion of the plasmasphere.

地球空间环境建模方案是一个基础广泛的社区发起的研究方案，研究地球磁层物理学以及磁层与大气层和太阳风的耦合。 全球地球观测系统的工作是通过一系列活动和重点小组来完成的，这些活动和小组解决了导致建立具有预测能力的全球地球空间大气环流模型的具体问题。该项目将为实现这一目标提供重要成果，有助于了解磁层等离子体分布和密度在确定太阳风-磁层耦合效率方面的作用。 此外，该项目还支助两名早期职业空间物理科学家发展独立的研究事业。 它还将为加州伯克利大学和密歇根大学安阿伯的本科生提供教育机会。 该项目的最终目标是开发和验证一个全球模型，该模型能够再现准确的等离子体磁层动态以及等离子体磁层对昼侧重联率和整体磁层顶动态的自洽效应。 利用现有的最先进的模型，将两种不同的方法，将等离子体磁共振纳入全球MHD模型将开发和评估使用多点航天器测量THEMIS，货车艾伦带探测器，和LANL卫星任务。 最好的，并充分验证，方法将被用来模拟三个不同的风暴事件和测量的重连率以各种方式包括和不包括的等离子体。