摘要
为探讨地球磁场的形成机理,应用经典电磁理论以微分的思维方式建立起三种自激发电机模型,用球形自激发电机模型简明地描述地球磁场的形成和分布;从分析地轴参考系中相对于自转地球静止的电荷间洛仑兹力的特点以及地球上的电荷在地球电场和地球磁场作用下的漂移规律,阐述中心磁场的形成及反转机理;分析电荷相对于地球的漂移以阐述偏磁场的形成.理论分析表明:地球上每一点的磁场都可以看成是由该点的几个分磁场叠加而成;地球具有自身的电场;地球电场与地球磁场同时产生、同时变化,且都源自于地球的自转和地球上正负电荷的非对等分布.
To explore the formation mechanisms of the earth＇s magnetic field, three types of the models of self-evoking generator are set up with the classic electromagnetism theory and the differential analyzing method. The model of spherical self-evoking generator is used to illustrate the formation and distribution of the earth＇s magnetic field. The formation and reverse turn mechanisms of the central magnetic field are clarified through analyzing the characteristics of Lorenzo force in the earth＇s axis reference system among the charges of the earth which are motionless relative to the self-rotating earth, and with the drifting law of electric charges under the action of the earth electric field and the earth magnetic field. The formation mechanism of the deflecting magnetic field is also illustrated by the drift of electric charges relative to the self rotating earth. It is claimed that the magnetic field at every point of the earth can be regarded as the overlaying of its several sub-magnetic fields. The earth has its own electric field. The earth electric field and the earth magnetic field are generated and change at the same time, and originate from the self-rotation of the earth and the nonequivalent distribution of the earth＇s positive and negative charges.
出处
《地球物理学进展》
CSCD
北大核心
2008年第4期1071-1084,共14页
Progress in Geophysics
关键词
形成机理
地球电场
地球磁场
自激发电机模型
地轴参考系
formation mechanism, earth electric field, earth magnetic field, model of self-evoking generator, earth＇s axis reference system
