M-I Coupling: Geospace Environment Modeling (GEM) Investigation of Field-Aligned Ionospheric Plasma Transport at Polar Latitudes

M-I 耦合：极地纬度场对准电离层等离子体传输的地球空间环境建模 (GEM) 研究

• 批准号: 0334388
• 负责人: James Horwitz
• 金额: $ 24.24万
• 依托单位: University of Alabama in Huntsville
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-11-15 至 2005-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0334388&HistoricalAwards=false
• 关键词: Coupling; Geospace; Environment; Modeling; GEM

This proposed project will utilize a combination of advanced modeling and analysis of observations to investigate magnetosphere-ionosphere mass exchange along high-latitude magnetic field lines. The Dynamic Fluid-Kinetic (DyFK) model combines a moment-based fluid treatment for the 120-1000 km region with a Generalized SemiKinetic (GSK) treatment of the region from 800 km altitude out to several earth radii. The project will investigate the coupling of F-region, topside and lower magnetospheric physical and chemical processes involved in the outflow (and return downflow) of ionospheric ions along high-latitude magnetic field lines. Two of the primary areas of the simulation investigation will be: (1) The systematic and detailed simulation of the dynamics of the O+/H+ collisional-to-collisionless transition region, and (2) the investigation of molecular ion production, loss and transport. Observational data from the Dynamics Explorer-2 satellite, the DMSP spacecraft, and incoherent scatter radars will be used to measure F-region/topside ionospheric parameters such as field-aligned flows, ion and electron temperatures, and densities. The observational data will be compared with the simulations to test the model predictions. The project will support graduate student training and postdoctoral researcher training. In addition, the results will have a societal impact by advancing our ability to predict space weather.

这个拟议的项目将利用先进的建模和观测分析相结合的方法，调查沿沿着高纬度磁场线的磁层-电离层质量交换。动态流体动力学（DyFK）模型将120-1000公里区域的基于动量的流体处理与从800公里高度到几个地球半径的区域的广义半动力学（GSK）处理相结合。该项目将调查电离层离子沿高纬度磁场线沿着流出（和向下返回）所涉及的F区、上部和下部磁层物理和化学过程之间的耦合。模拟研究的两个主要领域是：（1）O+/H+碰撞到无碰撞过渡区动力学的系统和详细模拟，以及（2）分子离子产生，损失和传输的研究。来自动力学探索者-2号卫星、DMSP航天器和非相干散射雷达的观测数据将用于测量F区/顶部电离层参数，如场向流、离子和电子温度以及密度。观测数据将与模拟进行比较，以检验模型预测。该项目将支持研究生培训和博士后研究人员培训。此外，这些结果将通过提高我们预测空间天气的能力而产生社会影响。