In my model, tidal forces drive an electric current of sorts that could fit the bill. Basically, at high tide, pressure at depth is relieved, allowing rock that had been forcibly ionized to get neutralized. So that's electron uptake. At low tide, it's the opposite...
Charles, Then one must ask what comes before the ocean tides? That model, by its very complexity, suggests that it may be describing effects, rather than edifying causes.
. These aurorae are unique because they can cover the entire pole, whereas aurorae around Earth and Jupiter are typically confined by magnetic fields to rings surrounding the magnetic poles. The large and variable nature of these aurorae indicates that charged particles streaming in from the Sun are experiencing some type of magnetism above Saturn that was previously unexpected.
http://missionscience.nasa.gov/ems/07_i ... waves.html
I don't have a model, other than to offer a similarity in images; and to suggest a likely rotating electric influx at the poles, as a prime driver.
M. Mathis offers this relevant bit of observation:
The Earth is recycling charge and charge peaks in the infrared (infrared is longwave). Every particle and body in the universe—from the electron to the galaxy—is a charge reactor. It is a machine that recycles charge. It most cases, it does this by spinning. A spinning sphere in a charge field immediately and naturally sets up charge potentials, and if that sphere is porous to charge, the charge comes in the poles and is emitted at the equator. The Earth does this just like the proton does and the Sun does and the galaxy does.
We can SEE it doing this in this diagram! Look at the hole at the south pole. Also look up “coronal hole.” Coronal holes are most often at the Solar poles, just like this. This is where [~charges] are going IN.
Aren't the subterranean magma flows 'tides' in themselves ?