Formation and Variation of Geomagnetic Field and Other Planetary Magnetic Fields as Well as Geomagnetic Declination and Geomagnetic Reversal

摘要

Although geomagnetic field has been found and utilized for a long time, and many hypotheses have been proposed about the cause of geomagnetic field, so far none of them is able to completely answer every question about the geomagnetic field. Thus the author has researched the formation and evolution of the geomagnetic field again, and discovered that during an interglacial period, under the action of solar ultraviolet rays and cosmic rays, Earth's atmosphere can produce a large amount of positive ions and negative ions, then form the positive charge layer at the top of cloud and the negative charge layer at the bottom of the cloud; with the rotation of Earth, the two charge layers generate a superposition of geomagnetic fields. This kind of magnetic field conforms to all the known characteristics of geomagnetic field. It can well explain the inhomogeneity of the spatial distribution of geomagnetic field and its characteristic of constant change over time, including geomagnetic declination and reversal. If the Earth enters a glacial period, the land and the sea would be covered by ice, then the bottom of the clouds would touch the ground, making the charge at the bottom of clouds become 0 and the surface charge be approximately equal to 0. At this time only the positive charge layer at the top of cloud has an effect on forming geomagnetic field, therefore realizing geomagnetic reversal. The formation and reversal of other planets’ magnetic fields are similar with that of geomagnetic field.