Global Simulations, chapter 37
Global Simulations, chapter 37
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全球模拟，第 37 章
DOI：
10.1002/9781119815624
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Joachim Raeder, Kai Germaschewski
中科院分区：
文献类型：
--
作者：
Joachim Raeder, Kai Germaschewski
在过去的几十年里，全球模拟已经成为研究磁层-电离层-热层系统的一个有价值的新工具，其中一些被认为是社区模型，可以根据社区的需求在社区协调建模中心（CCMC）运行。大多数领先的全球模型仍然基于传统且行之有效的 MHD 近似；他们非常成功地再现了地球空间的主要特征和过程。在这里，我们简要回顾这些模型的目的和实用性、它们的历史、它们的基本结构、电离层-热层系统和内磁层子模型的需求，以及固有的模型局限性。讨论了主要的计算和数值限制，并提出了最近针对等离子体注入和锯齿振荡的模拟。
Over the past few decades global simulations have emerged as a valuable new tool to study the magnetosphere–ionosphere–thermosphere system, to the point where some of them are considered community models available for runs on demand by the community at the Community Coordinated Modeling Center (CCMC). Most leading global models are still based on the conventional and well-established MHD approximation; they are remarkably successful reproducing the major features and processes in geospace. Here, we briefly review the purpose and utility of such models, their history, their basic structure, the need for submodels of the ionosphere–thermosphere system and the inner magnetosphere, as well as inherent model limitations. The major computational and numerical constraints are discussed and recent simulations addressing plasma injections and sawtooth oscillations are presented.