地球基本磁场的形成与变化的探讨  

Research into the formation and change of the basic geomagnetic field

作　　者：李安生[1] 李振亭[2] 

机构地区：[1]安阳师院物理系,安阳455002 [2]河南师大物理与信息工程学院,新乡453007

出　　处：《地球物理学进展》2007年第3期750-758,共9页Progress in Geophysics

摘　　要：本文在铁磁体假说的基础上,探讨地球基本磁场的形成与变化的原因.地球的偶极磁场是由于地球的回转和内核中特殊的磁化环境,使内核中心形成的饱和磁化的永磁球体(即磁核)产生的,磁核的大小和温度负相关.地球的非偶极磁场,由外核内几个可确定的磁偶极子产生,这些磁偶极子,是外核中液态金属的流动,切割磁核的磁场而产生的涡流形成的.This article explores the formation and the cause of its change of the basic geomagnetic field on the basis of the ferromagnetic hypothesis. Because of Earth＇s rotation and special magnetization environment in the kernel of the earth, it makes the magnetic field of saturated magnetic permanent spheroid in the earth＇s core which produces dipole magnetic field on earth. The magnetic core in size is related to temperature. （magnetic core）, Non- dipole magnetic field on earth may be possibly produced by several definite magnetic dipoles outside the earth＇s core. These magnetic dipoles are liquid metal flowing outside in core, which cuts the magnetic core of magnetic field, producing eddy, which forms these magnetic dipoles.

关 键 词：地球磁场 磁化 居里点 磁核 非偶极磁场 磁偶极子 

分 类 号：P318[天文地球—固体地球物理学]