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提出一种可能产生行星际磁场南北分量扰动的物理机制 ,并将此物理机制运用于三维运动学模型 ,对原模型作了改进 .使用改进后的模型模拟研究了 1 997年 5月 1 2日 0 6:30UT爆发的晕状 (halo)日冕物质抛射 (CME)事件对行星际磁场和等离子体的扰动 ,以及1 978— 1 981年间 1 7个与CME有关的行星际扰动事件 .在 1 7个事件中有 1 4个事件可准确预测出行星际磁场南北分量的方向 ,准确率为 82 % .结果表明 ,模型计算出的行星际磁场南北分量的扰动方向与观测的方向是基本一致的 .
A physical mechanism that may cause the north-south component perturbation of the interplanetary magnetic field is proposed, and the physical mechanism is applied to the three-dimensional kinematics model to improve the original model.Using the improved model to simulate the May 12, 1997 The disturbance of interplanetary magnetic field and plasma by the halo coronal mass ejection event (CME) at 06:30 to 18:30 and the 17 CME-related interplanetary disturbances during 1978-1981, One of four events can accurately predict the direction of the north-south component of the interplanetary magnetic field with an accuracy rate of 82%. The results show that the perturbation direction of the north-south component of the interplanetary magnetic field calculated by the model is basically consistent with the observed direction.