GEM: A Combined Simulation Model for the Magnetosphere: Global MHD Meets the Rice Convection Model

其目标是通过合并现有的两个模型来开发一个新的地球磁层大尺度动力学计算模型：(I)海军研究实验室组织开发的全球3D MHD代码，以及(Ii)赖斯对流模型。合并后的代码将保留MHD代码的自我一致性和全面性，并将包括弓形激波、磁鞘、太阳-风/磁层相互作用以及遥远的尾巴。但合并后的代码也将利用赖斯对流模型对内磁层和近地等离子体片的精细网格、多流体表示。此外，通过使用MHD模型提供的自洽随时间变化的磁场，RCM对磁层内部的表示将得到实质性的改进。两个法规的合并将分三个阶段完成，每一步都要进行仔细的测试和分析。在每个阶段，代码将被用来模拟特定的、观测良好的磁层事件，模拟结果将与在GEM战役中获得的观测结果进行检验。

The objective is to develop a new computational model of the large- scale dynamics of the Earth's magnetosphere by merging two existing models: (i) the global 3d MHD code that was orginially developed at the Naval Research Laboratory, and (ii) the Rice Convection Model (RCM). The merged code will retain the self-consistency and comprehensiveness of the MHD code and will include the bow shock, magnetosheath, solar-wind/magnetosphere interactions, as well as the distant tail. But the merged code will also utilize the Rice Convection Model's finely gridded, many-fluid representation of the inner magnetosphere and near-Earth plasma sheet. In addition, the RCM's representation of the magnetospheric interior will be substanitally improved through the use of the self-consistent time- dependent magnetic field supplied by the MHD model. Merger of the two codes will be accomplished in three phases, with careful testing and analysis at each step. In each phase, the code will be used to simulate specific, well-observed magnetospheric events, and simulation results will be tested against observations obtained in GEM campaigns.