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首页> 外文期刊>Journal of Geophysical Research, A. Space Physics: JGR >Feature-based validation of the Lyon-Fedder-Mobarry magnetohydrodynamicalmodel
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Feature-based validation of the Lyon-Fedder-Mobarry magnetohydrodynamicalmodel

机译：基于功能的验证Lyon-Fedder-Mobarry magnetohydrodynamicalmodel

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摘要

Field-aligned currents (FACs) play an important role in the coupling between the ionosphere and magnetosphere. Numerical simulation of these phenomena is of increasing interest, but validation has been hampered by a lack of a formal framework to compare simulations to satellite-derived products. We develop a statistical approach to compare FAC simulations from global magnetohydrodynamical models against satellite products. We introduce a robust algorithm that automatically detects and defines regions 1 and 2 FACs. In an example, currents derived from the Iridium satellites are compared against simulated currents from two resolutions of the Lyon-Fedder-Mobarry model on one solar event. We assess both average and structured discrepancies, the former being a level shift of the physical model away from the satellite product, while structural discrepancy refers to time-varying, continuous differences. For this event, the lower resolution version of the Lyon-Fedder-Mobarry is shown to be a poor representation of the satellite-derived FACs, while the higher resolution version substantially reduces discrepancy.
机译：Field-aligned电流(流式细胞仪)发挥重要在电离层和之间的耦合磁气圈。现象的兴趣越来越浓厚,但是验证一直受限于缺乏正式的框架比较模拟采用卫星产品。统计方法比较FAC模拟从全球magnetohydrodynamical模型卫星产品。算法,自动检测和定义区域1和2流式细胞仪。源自于铱卫星进行了比较对模拟电流从两个决议Lyon-Fedder-Mobarry模型的太阳能事件。差异,前者的水平转变物理模型的卫星产品,而结构性差异是指时变、持续的差异。事件,低分辨率版本的Lyon-Fedder-Mobarry显示差表示采用卫星的流式细胞仪,而高分辨率版本减少差异。

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