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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | DongSheng Cai Xiaoyang Yan Lembege, B. Nishikawa, K.-I. |
| Copyright Year | 2004 |
| Description | Author affiliation: Inst. of Syst. & Informatics, Univ. of Tsukuba, Japan (DongSheng Cai; Xiaoyang Yan) |
| Abstract | The energy transfer from the solar wind to the Earth magnetosphere, and the cause of magnetic storms have been mysteries for decades. Axford proposed that the reconnection of magnetic field at the dayside magnetopause is one of the candidates to explain the huge energy transfer from the solar wind to the Earth magnetic field. However, the mechanism of reconnection has not been understood well in magnetospheric physics. Using a 3D full electromagnetic particle model (ENMM), we have investigated the structural stability of the Earth magnetosphere at the day-side magnetopause with a time-varying southward IMF. The distance between the magnetopause and the Earth, R/sub mp/ was measured with varying southward IMF step by step slowly. Suppose that the Earth magnetic field motion evolves according to the time-dependent equation in the general form B/sub t/=G(B,/spl lambda/). Solutions of G(B,/spl lambda/)=0 represent steady magnetic fields which we have been considering. When the parameter /spl lambda/ (IMF B/sub z/) is varied, one mean magnetic field may persist. but become unstable to small perturbations as A crosses a critical value. At such a transition point, a new magnetic field may bifurcate with breaking symmetry, which shows dissipative structures. The hysteresis in the IMF B/sub z/-R/sub mp/ plot indicates that the energy transfer system from the solar wind to the magnetosphere is dissipative, which is caused by the subcritical bifurcation. The differences of local and global steady reconnections are discussed with 3D magnetic field structures. |
| Starting Page | 372 |
| Ending Page | 374 |
| File Size | 186463 |
| Page Count | 3 |
| File Format | |
| ISBN | 0780384040 |
| DOI | 10.1109/APRASC.2004.1422487 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2004-08-24 |
| Publisher Place | China |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Earth Magnetic field measurement Storms Energy exchange Bifurcation Electromagnetic modeling Topology Magnetic fields Magnetosphere Physics |
| Content Type | Text |
| Resource Type | Article |
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