Atmospheric dynamo
Encyclopedia
The Atmospheric dynamo is a pattern of electrical currents that are set up in the Earth's ionosphere
Ionosphere
The ionosphere is a part of the upper atmosphere, comprising portions of the mesosphere, thermosphere and exosphere, distinguished because it is ionized by solar radiation. It plays an important part in atmospheric electricity and forms the inner edge of the magnetosphere...

by multiple effects, mostly the Sun's solar wind, but also the tides of the moon and Sun.The currents flow in circuits between the poles and the equator, but they are not well understood.
The source of this article is wikipedia, the free encyclopedia.  The text of this article is licensed under the GFDL.
 
x
OK