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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >New Developments in the Comprehensive Inner Magnetosphere-Ionosphere Model
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New Developments in the Comprehensive Inner Magnetosphere-Ionosphere Model

机译：新发展的全面的内部Magnetosphere-Ionosphere模型

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A Comprehensive Inner Magnetosphere-Ionosphere (CIMI) model was developed to study the dynamic variations of the radiation belts, ring current, and plasmasphere as well as the couplings between these populations and with the ionosphere. The CIMI model has been used in multiple studies to simulate a number of magnetic storms and reproduce many observable features that involve cross-region and cross-energy processes. This model has been continuously validated and improved. In this study, we report on two major recent advancements in CIMI. The first improvement is transforming coordinates in both configuration and velocity space into uniform grids. Numerical schemes, especially those of high order, are generally more stable on such uniform grids. The second advancement is to solve both advection and diffusion in the CIMI equation in a single coordinate system. Previously, the phase space distribution was expressed in terms of the first two adiabatic invariants when solving for particle drift, whereas particle distributions were transformed into energy and pitch angle for calculating wave diffusion. In the new approach in CIMI, particles and distribution functions are identified by their momentum. This change avoids interpolation errors inherent in the mapping of the phase space distribution when switching back and forth between advective and diffusive transport. We describe the detailed implementation of these recent advancements in the CIMI model, and demonstrate how the newly improved model provides better predictions of the ring current and radiation belt dynamics.
机译：一个全面的内部Magnetosphere-Ionosphere(会)模型是研究开发动态变化的辐射带,环电流,和等离子体层以及之间的耦合这些人口和电离层。CIMI模型被用于多种研究模拟一个磁性风暴和数量可观察到的许多特性,包括繁殖区域和cross-energy流程。不断验证和模型改善。最近会进步。改进是在转换坐标配置和速度空间分成制服网格。高阶,通常更稳定等统一的网格。平流和扩散CIMI方程在一个坐标系。相空间分布表达的前两个绝热不变量的时候求解粒子漂移,而粒子转化为能源和分布螺旋角计算波扩散。会的新方法,粒子和分布函数是确定的的势头。内在的相空间的映射分布在来回切换之间的对流和扩散运输。描述实现的详细最近的进步CIMI模型,证明新模型提供了改善更好的戒指当前和预测辐射带动态。

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