Merging of coronal and heliospheric numerical two‐dimensional MHD models
Merging of coronal and heliospheric numerical two‐dimensional MHD models
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DOI：
10.1029/2002ja009334
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发表时间：
2002-12
影响因子：
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通讯作者：
D. Odstrcil;J. Linker;R. Lionello;Z. Mikić;P. Riley;V. Pizzo;J. Luhmann
中科院分区：
文献类型：
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作者：
D. Odstrcil;J. Linker;R. Lionello;Z. Mikić;P. Riley;V. Pizzo;J. Luhmann
空间天气研究需要研究太阳和地球之间在不同时空尺度上同时发生的一系列复杂的耦合动力现象。专门的基于物理的数值模型已经开发出来，以解决整个系统的特定方面。但是，必须采用综合的模式方法，以提供适合于解释各种远距离和现场观测和发展预报能力的全貌。在本文中，我们展示了一个涉及磁云、激波、流带和电流片的二维假设情况下日冕和日球MHD模型的合并。被剪切的头盔流带的破坏会发射日冕物质抛射（CME）（由日冕模型模拟），并在其通过行星际空间（由日球层模型模拟）的传播过程中演变。这些模型采用不同的物理近似和数值网格来模拟各自空间和时间域中的物理现象。这两个模型的合并使得从太阳大气层起源到到达地球的日冕物质抛射的精确跟踪成为可能。
[1] Space weather research requires investigation of a complex chain of coupled dynamic phenomena occurring simultaneously on various spatial and temporal scales between the Sun and Earth. Specialized physically based numerical models have been developed to address particular aspects of the entire system. However, an integrated modeling approach is necessary to provide a complete picture suitable for interpretation of various remote and in situ observations and for development of forecasting capabilities. In this paper we demonstrate merging of coronal and heliospheric MHD models for a two-dimensional hypothetical case involving a magnetic cloud, shock, streamer belt, and current sheet. The disruption of a sheared helmet streamer launches a coronal mass ejection (CME) (simulated by the coronal model), which evolves during its propagation through interplanetary space (simulated by the heliospheric model). These models employ different physical approximations and numerical grids to simulate physical phenomena over their respective spatial and temporal domains. The merging of the models enables accurate tracking of a CME from its origin in the solar atmosphere to its arrival at Earth.