Space Weather: Modeling Polar Cap Dynamics

太空天气：极冠动力学建模

• 批准号: 0001638
• 负责人: Joel Fedder
• 金额: --
• 依托单位: George Mason University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-08-01 至 2004-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0001638&HistoricalAwards=false
• 关键词: Space; Weather; Modeling; Polar; Cap

The investigators will study the dependence of polar cap dynamics on solar wind conditions using a magnetohydrodynamic (MHD) code. The model results will be compared with observations of polar cap dynamics obtained using optical data from Eureka, Canada. Particular emphasis will be placed on periods when the interplanetary magnetic field makes pronounced changes in direction and the optical data show distinct auroral behavior. Simulation results will be used to specify the polar cap boundaries which will be compared to the Eureka measurements or satellite images, when available. The research results will form the basis for improved models of the polar magnetic field, for prediction of solar particle entry regions, and for predicting trajectories to satellite and ionospheric altitudes. The results will also enhance understanding of the dynamics and origins of polar cap aurora. MHD models have great potential in helping to mitigate the potential hazards on technological systems due to space weather effects.

研究人员将使用磁流体动力学（MHD）代码研究极帽动力学对太阳风条件的依赖性。该模型的结果将与利用加拿大尤里卡的光学数据获得的极帽动力学观测结果进行比较。将特别强调行星际磁场在方向上发生明显变化和光学数据显示明显极光行为的时期。模拟结果将用于确定极帽边界，并与尤里卡的测量结果或卫星图像（如果有的话）进行比较。研究结果将成为改进极磁场模型、预测太阳粒子进入区域以及预测卫星和电离层高度轨迹的基础。研究结果还将加强对极地极光动力学和起源的理解。MHD模型在帮助减轻由于空间天气影响对技术系统造成的潜在危害方面具有很大的潜力。