A Different Approach to the Dynamo Mechanism

The study of the Earth’s magnetic field is the subject of a continuous and complex research effort. Practically, almost all studies on the geomagnetic field are based on the heat provided by the inner core. Other sources of heat are also invoked, such as the decay of radioactive elements, gravitational force, chemical reactions. However, solutions are still sought for a coherent understanding of the geodynamo mechanism that leads to the generation of the Earth’s magnetic field in the rotating fluid outer core and good conductor of electricity. After studying the elements that participate in the operation of the dynamo mechanism through the prism of the basic principles of physics, an operating model was found that provides a coherent understanding of the geodynamo, based on the phenomena that occur at the place of contact between the lower mantle and the outer core. At the same time, this model reconfirms and consolidates the dynamo theory formulated by Sir Edward Crisp Bullard.