权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Solar Wind - Magnetosphere - Ionosphere Coupling

太阳风-磁层-电离层耦合

基本信息

批准号：
9117484
负责人：
George Siscoe
金额：
$ 28.22万
依托单位：
University of California-Los Angeles
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
1992
资助国家：
美国
起止时间：
1992-02-01 至 1994-01-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=9117484&HistoricalAwards=false
关键词：
Solar Wind Magnetosphere Ionosphere Coupling

项目摘要

Our understanding of the dynamics of the magnetosphere will be advanced by this proposed research in three ways: (1) to carry to a new and significantly greater level of completeness the assembly of the basic engine that drives magnetospheric circulation, (2) specify the global geometry of magnetospheric circulation for times when it appears to operate in reverse (up to 50% of the time), and (3) graphically demonstrate and quantitatively evaluate over an entire magnetospheric cross section the coupling by which the solar wind powers the engine that drives magnetospheric circulation. The first project will combine for the first time separate and distinct models for three major components of the engine (voltage generator, current generator, and ring current energy storage element) into a single, physically explicit, self-consistent, quantitative model that predicts the distribution of currents and voltages over the ionospheric surfaces on which magnetospheric circulation is expressed. The second project will produce quantitatively explicit, global magnetic field maps showing for the first time how hemispherical asymmetry plays a critical role in establishing reverse circulation. The third project will produce empirically derived magnetic field maps (from IMP 8 magnetic field data) showing how the solar wind magnetic field - the coupling field - drapes over and attaches to the magnetosphere to deliver the power to the engine that drives magnetospheric circulation.

这项拟议的研究将以三种方式推进我们对磁层动力学的理解：(1) 将驱动磁层环流的基本引擎的组装提升到一个新的、显着更高的完整性水平，(2) 指定磁层环流似乎反向运行时的全局几何形状（最多 50% 的时间），以及 (3) 以图形方式演示和定量评估整个磁层横截面太阳风为驱动磁层循环的发动机提供动力的耦合。第一个项目将首次将发动机三个主要部件（电压发生器、电流发生器和环流能量存储元件）的独立且不同的模型组合成一个物理明确的、自洽的定量模型，该模型可预测表达磁层环流的电离层表面上的电流和电压的分布。第二个项目将生成定量明确的全球磁场图，首次显示半球不对称性如何在建立逆循环中发挥关键作用。第三个项目将生成凭经验得出的磁场图（来自 IMP 8 磁场数据），显示太阳风磁场（耦合场）如何覆盖并附着在磁层上，以向驱动磁层循环的发动机提供动力。