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Some of the heat on the surface of the earth is a result of the energy contained within the earth. The magnetic field experienced on the surface of the earth is a result of the internal energy within the earth. The internal heat of the earth causes ionization within the earth and separation of the electrons from the donor atoms. If the separation is great enough and the number of atoms ionized great enough, the result will be sufficient to cause a magnetic field within, on, and above the surface of the earth. This field is known as a dipole field.
The magnetic field of the earth has been decreasing and we are approaching the end of a warming cycle and will be entering a cooling cycle with the onset of a magnetic reversal. How are these three things related, namely, warming, cooling, and magnetic field of the earth? The controlling mechanism is the magnetic field of the earth. When global warming is great enough, then the electrons will tend to migrate closer to the surface of the earth where the observer is located. When the electrons are at the surface of the earth then there is no relative motion between the observer and the electrons and no magnetic field will be produced by these electrons. In order for charges to produce a magnetic field there has to be relative motion between the observer and the charges. If the charges and the observer are at the same distance from the center of the earth, then there is no relative motion, in spite of the fact that they are both rotating at a high speed. Now electrons are not expected to migrate to the surface but rather will move towards the surface with a resulting decrease in magnetic field. By the same token, the positive charges which are locked into position at or near the center of the earth will experience a large relative motion which will produce a large magnetic field due to their high relative velocity. If the magnetic field is decreasing with an increasing of internal heat of the earth, then one can expect a reversal of the earth's magnetic field. This could occur within a decade, a century, or a millennium1.
With a reversal, one can expect global cooling, which will bring on a glacial period that will last possibly for a million years. This global cooling will cause the electrons to move inward due to electrostatic forces between positive charges in the center of the earth and the electrons, which were moved away from the center due to the heat of the earth.
As the electrons move nearer to the center of the earth, their relative velocity will increase and result in a greater magnetic field due to electrons. When the electrons have moved near enough to the center of the earth, the resulting magnetic field will be great enough to overcome the magnetic field produced by the positive charges. The result will be a reversal from a reversed field to a normal field.
The two paragraphs above explain how a normal magnetic field can change to a reverse magnetic field and then can be made to reverse again to a normal field. This process has been going on for at least the last 65 million years. Prior to that time the intervals between normal and reverse was much greater; however the theory is still applicable. The evidence is scant; however there is evidence of glacial periods as far back as 2.2 billion years ago2.
From the above, one can theorize that the normal magnetic field such as we are in today is a global warming period and the reverse field would be a global cooling period (glacial period). What is the cause of this switching process from warm to cool? From the above paragraphs the switching process is activated by the earth's magnetic field. If the earth gets too hot the magnetic field causes a switch. If the earth gets too cold then the earth's magnetic field reverses and the heating of earth begins again. How the earth's magnetic field controls the internal heat of the earth so that switching can occur is unknown.
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1 E-book and computer models located on website, www.earthsgeomotor.com
2 Physical Geology by Sheldon Judson and Marvin E. Kauffman eighth edition p 348
The above material is covered
by copyrights issued to Eugene D. Richard.
The computer model referenced above is covered by a copyright issued to David R.
Richard