SAMI3‐RCM simulation of the 17 March 2015 geomagnetic storm
SAMI3‐RCM simulation of the 17 March 2015 geomagnetic storm
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DOI：
10.1002/2016ja023341
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发表时间：
2017-01
期刊：
影响因子：
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通讯作者：
J. Huba;S. Sazykin;A. Coster
中科院分区：
文献类型：
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作者：
J. Huba;S. Sazykin;A. Coster
我们使用耦合的 SAMI3-RCM 代码对电离层-等离子层系统对 2015 年 3 月 17 日地磁风暴的响应进行了自洽建模研究。这项工作的新颖之处在于，我们捕获了全球范围内电离层的重要风暴时间动态及其在等离子体层中的表现。我们发现与磁暴相关的穿透电场导致中低纬度电离层的风暴时间增强密度。我们将模拟的总电子含量 (TEC) 与美国区域 GPS 测量的 TEC 进行比较。此外，我们还观察到极冠“电离之舌”的发展以及日落后、午夜前区域极光等离子流的形成及其对等离子层的影响。然而，我们在这次事件中没有看到等离子层羽流的发展，我们将其归因于风暴的长主阶段（〜18小时）。
We present a self‐consistent modeling study of the ionosphere‐plasmasphere system response to the 17 March 2015 geomagnetic storm using the coupled SAMI3‐RCM code. The novel feature of this work is that we capture the important storm time dynamics of the ionosphere on a global scale and its manifestation in the plasmasphere. We find that the penetration electric fields associated with the magnetic storm lead to a storm time enhanced density in the low‐ to middle‐latitude ionosphere. We compare the modeled total electron content (TEC) with GPS‐measured TEC in the American sector. Additionally, we observe the development of polar cap “tongues of ionization” and the formation of subauroral plasma streams in the postsunset, premidnight sector, and its impact on the plasmasphere. However, we did not see the development of plasmaspheric plumes during this event which we attribute to the long main phase of the storm (∼18 h).