GEM: Study of ULF Wave Energy Transport Through the Polar CUSP

多机构美国全球变化战略的一个组成部分 研究计划（我们不断变化的星球，”地球委员会 Sciences，1991）正在理解和模拟地球空间 环境 作为其对美国全球贡献的一部分， 美国国家科学基金会的变化研究计划 大气科学部建立了一个新的研究 地球空间环境建模倡议，目标是 支持基础研究的动力和结构 地球空间的性质，导致全球建设 具有预测能力的地理空间模型。 第一次创业板运动的主题是 磁层边界，磁鞘超出它，和 从边界到磁层的连接 电离层 最近的观察表明， 磁层顶和边界层区域附近可以 被传送到极尖。 这项赠款涉及 纵波在震源区传播研究 磁层顶附近进入极尖， 注入极区离子的不稳定性 磁层的尖点 对于这两项研究， 将考虑将结果与观察结果进行比较 磁脉动信号

An integral component of the multi-agency U.S. Global Change Research Program (Our Changing Planet," Committee on Earth Sciences, 1991) is understanding and modeling the geospace environment. As part of its contribution to the U.S. Global Change Research Program, the National Science Foundation's Division of Atmospheric Sciences has established a new research initiative, Geospace Environment Modeling (GEM), with the goal of supporting basic research into the dynamical and structural properties of geospace, leading to the construction of a global geospace model with predictive capability. The subjects of the first GEM campaign are the magnetospheric boundary, the magnetosheath beyond it, and the connection from the boundary through the magnetosphere to the ionosphere. Recent observation suggest that waves generated in the vicinity of the magnetopause and boundary layer regions may be transported into the polar cusp. THis grant involves the study of compressional wave propagation from a generation region near the magnetopause into the polar cusp and an examination of the instabilities associated with ion injected into the polar cusp from the magnetosheat. For both studies a primary consideration will be to compare the results with observed magnetic pulsation signatures.