Reproduction of Ground Magnetic Variations During the SC and the Substorm From the Global Simulation and Biot-Savart's Law

T. Tanaka; Y. Ebihara; M. WatanabeM. DenS. FujitaT. KikuchiK. K. HashimotoR. Kataoka

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Reproduction of Ground Magnetic Variations During the SC and the Substorm From the Global Simulation and Biot-Savart's Law

机译：地磁场变化的再生产从全球SC和亚暴仿真和毕奥萨伐尔定律

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In this paper, currents causing the sudden commencement (SC), the AU/AL indices, and the positive bay during the substorm are identified from the global simulation and Biot-Savart's law. Candidate currents assumed as causes of these ground magnetic variations are the ionospheric Hall current, the ionospheric Pedersen current, the field-aligned current (FAC), and other magnetospheric currents than the FAC. In general, FAC effect and Pedersen current effect cancel out each other under the restriction of Fukushima's theorem. During the SC, for instance, the midlatitude preliminary positive impulse appears in the prenoon and midlatitude preliminary reverse impulse (PRI) appears in the postnoon, due to the remaining effect of the Hall current. However, violations of the Fukushima's theorem are also common such as in the cases of the equatorial PRI, the auroral electrojet, and the positive bay. The equatorial PRI caused by the Pedersen current appears both in the prenoon and postnoon regions. In the auroral region, the Hall current effect prevails over other currents so much and determines the AU/AL indices only from it regardless other currents. The midlatitude positive bay on the nightside is generated by the effect of the FAC. From these diverse reproduction of ground magnetic variations, a further verification is given for the global simulation in reproductions of the magnetosphere-ionosphere coupling process.

机译：摘要电流造成的突然毕业典礼(SC),非盟/ AL指数和积极湾在识别亚暴从全球模拟和毕奥萨伐尔定律。候选人电流假设这些的原因地磁场的变化是电离层彼得森电离层电流霍尔电流,field-aligned电流(FAC)等比FAC磁性层的电流。彼得森FAC效应和电流效应抵消了福岛的限制下定理。中间纬度初步出现积极的冲动prenoon和中间纬度初步的反向脉冲(PRI)出现在postnoon,由于剩下的霍尔电流的影响。然而,违反福岛的定理也等常见的情况下赤道革命制度党,极光电喷流,积极的海湾。皮德森当前prenoon和出现postnoon地区。目前效果高于其他电流,决定了非盟/ AL指数仅从它不管其他电流。积极湾阴面是生成的FAC的效果。地磁场变化的繁殖进一步验证了全球模拟的复制品magnetosphere-ionosphere耦合过程。

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《Journal of Geophysical Research, A. Space Physics: JGR》 |2020年第2期|e2019JA027172-1-e2019JA027172-15|共15页
作者
T. Tanaka; Y. Ebihara; M. WatanabeM. DenS. FujitaT. KikuchiK. K. HashimotoR. Kataoka;
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作者单位

Space and Upper Atmospheric Group, National Institute of Polar Research, Tachikawa, Japan;

Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Japan,;

International Center for Space Weather Science and Education, Kyushu University, Fukuoka, Japan,Department of Agriculture, Kibi International University, Minamiawaji, Japan,Meteorological College, Kashiwa, Japan,Institute of Space-Earth Environmental Research, Nagoya University, Nagoya, Japan,Space Environment Laboratory, National Institute of Information and Communications Technology, Tokyo, Japan,;

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正文语种英语
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关键词
magnetic variations; ground; Pedersen currentssubstormsHall current;

机译：磁性变化,地面;他currentssubstormsHall当前;

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Reproduction of Ground Magnetic Variations During the SC and the Substorm From the Global Simulation and Biot-Savart's Law

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