2000年10月5日磁暴主相两个不同时段太阳风参数特征告诉我们什么?  

What insights can the solar wind parameters and their influence on the ring current during the two distinct periods of the main phase of the geomagnetic storm on 2000 October 5?

作　　者：李琪[1] 乐贵明[2,3] LI Qi;LE GuiMing(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China;Key Laboratory of Radiometric Calibration and Validation for Environmental Satellites,National Satellite Meteorological Center(National Center for Space Weather),China Meteorological Administration,Beijing 100081,China;Innovation Center for FengYun Meteorological Satellite(FYSIC),Beijing 100081,China)

机构地区：[1]中国地震局地球物理研究所,北京100081 [2]中国气象局空间天气重点开放实验室/国家卫星气象中心(国家空间天气监测预警中心),北京100081 [3]许健民气象卫星创新中心,北京100081

出　　处：《地球物理学报》2025年第1期45-53,共9页Chinese Journal of Geophysics

基　　金：国家自然科学基金面上项目(41774085,41074132,41274193,41474166);中国地震局地球物理研究所基本科研业务费专项(DQJB24X25和DQJB22X12)资助。

摘　　要：本文研究了2000年10月5日磁暴主相两个不同时段期间环电流的变化速度与相应太阳风参数的关系.研究发现,磁暴主相期间环电流的变化速度并不取决于行星际磁场南向分量的平均值和最大值,也不取决于太阳风电场的平均值和最大值.本文的研究证明,磁暴环电流增强期间环电流的变化速度,不仅取决于行星际磁场南向分量和太阳风的速度,还取决于太阳风的动压,而且太阳风的动压起着非常重要的作用.研究还发现,采用Burton et al.(1975)方程和O′Brien,McPherron (2000a)方程估算得到的2000年10月5日的两次地磁活动的强度远低于实际的观测值.We studied the relationship between the rate of change of the ring current and corresponding solar wind parameters during two different periods of the main phase of the geomagnetic storm on October 5,2000.Our findings indicate that the rate of change of the ring current during this phase is not determined by the average or peak values of the southward component of the interplanetary magnetic field or the solar wind electric field.This study reveals that the rate of change of the ring current,particularly during the intensification of the storm's ring current,is influenced not only by the southward component of the interplanetary magnetic field and solar wind velocity but also significantly by the dynamic pressure of the solar wind.Additionally,we discovered that the SYM-H index variations during the two different periods of the main phase,as predicted by the models of Burton et al.(1975)and O'Brien,McPherron(2000a),significantly underestimated the actual observed values.

关 键 词：行星际磁场南向分量 太阳风电场 太阳风动压 磁暴环电流 

分 类 号：P353[天文地球—空间物理学]