Recent efforts coupling our Sun-to-Earth magnetohydrodynamics (MHD) model and lower-corona magnetofrictional (MF) model are described. Our Global Heliospheric MHD (GHM) model uses time-dependent three-component magnetic field data from the lower-corona MF model as time-dependent boundary values. The MF model uses data-assimilation techniques to introduce the vector magnetic field data from the Solar Dynamics Observatory/Helioseismic and Magnetic Imager, hence as a whole this simulation coupling structure is driven with actual observations. The GHM model employs a newly developed interface boundary treatment that is based on the concept of characteristics, and it properly treats the interface boundary sphere set at a height of the sub-Alfvnic lower corona (1.15 R _⊙ in this work). The coupled model framework numerically produces twisted nonpotential magnetic features and consequent eruption events in the solar corona in response to the time-dependent boundary values. The combination of our two originally independently developed models presented here is a model framework toward achieving further capabilities of modeling the nonlinear time-dependent nature of magnetic field and plasma, from small-scale solar active regions to large-scale solar wind structures. This work is a part of the Coronal Global Evolutionary Model project for enhancing our understanding of Sun–Earth physics to help improve space weather capabilities.

描述了最近将我们的太阳对地磁流体动力学 (MHD) 模型和低日冕磁摩擦 (MF) 模型结合起来的努力。我们的全球日球层 MHD (GHM) 模型使用来自低日冕 MF 模型的时间相关的三分量磁场数据作为时间相关的边界值。MF模型使用数据同化技术引入来自太阳动力学天文台/日震和磁成像仪的矢量磁场数据，因此整个模拟耦合结构是由实际观测驱动的。的GHM模型采用新开发的接口是基于特征的概念边界处理，而且它适当地对待界面边界球组在子Alfvnic下电晕（1.15的高度- [R _⊙在这项工作中）。耦合模型框架在数值上产生扭曲的非势磁特征和随后的日冕爆发事件，以响应与时间相关的边界值。我们在此介绍的两个最初独立开发的模型的组合是一个模型框架，可进一步实现对磁场和等离子体的非线性时间相关性质进行建模的能力，从小型太阳能活动区到大型太阳风结构。这项工作是日冕全球演化模型项目的一部分，旨在增强我们对太阳-地球物理学的理解，以帮助提高空间天气能力。