Space Weather: Modeling Polar Cap Dynamics

研究人员将使用磁流体力学(MHD)程序研究极冠动力学与太阳风条件的相关性。模型的结果将与使用加拿大尤里卡的光学数据获得的极冠动力学观测结果进行比较。特别强调的是行星际磁场在方向上发生显着变化，光学数据显示出明显的极光行为的时期。模拟结果将被用来指定极地冰盖边界，如果有的话，将与尤里卡的测量或卫星图像进行比较。研究结果将为改进极地磁场模型、预测太阳粒子进入区以及预测卫星和电离层高度的轨迹奠定基础。这一结果还将加强对极冠极光的动力学和起源的理解。MHD模型在帮助减轻空间天气影响对技术系统的潜在危害方面具有巨大潜力。

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.