太阳风和地球磁层相互作用的两种可能类型

本文对太阳活动20周不同活动期间的太阳风参数与地磁活动性指数分别进行了相关分析,并进一步对太阳活动极大和极小年分别对B_z和太阳风参数V、T、N的时均值日方差作了分析比较。结果指出,除目前普遍认为的IMF与地磁场重联导致的磁扰外,还有一类与B_z无关,而是由高温、高速、热不均匀太阳风等离子体导致的地磁扰动类型。 

Two Possible Modes of the Interactions Between the Solar Wind and the Magnetosphere

The correlation analyses between the solar wind parameters (V,T,N and Bz) and the geomagnetic activity for the different periods of solar activity of 20th solar cycle are carried out.Further more,the solar wind parameters and its daily RMS of hourly mean values are compared to geomagnetic activity via regression analyses for the solar maximum and minimum years of the same cycle.The results show that in addition to the magnetic storms due to the reconnection between the IMF and the earth's magnetic field,which is accepted generally,there is another geomagnetic disturbance which is independent of Bz and is caused by solar wind with high temperature,high speed and thermo-nonumiform.