It is my contention that the core of the Earth influences the climate of the Earth. I believe firmly that the great cyclical variations in the Earth’s surface temperature have in fact been determined by variations in the Earth’s core temperature. This not to say that I believe that the core of the Earth will vary as does the climate of the Earth, that is nearly impossible, but rather that the Earth’s core is generating heat that is escaping to the surface and as it does reach the surface by means of convection and other variations in the various layers of the Earth’s sub-surface, the climate above is also influenced and this influence is quite significant. I have held this view as true for many years now. As the core radiates heat to the surface it affects the Earth’s climate significantly.
The original inspiration for this realization was that once, upon thinking of San Francisco and its tendency to remain warm in winter yet cool in summer, even while Los Angeles only a short distance away experienced vastly greater variation in seasonal temperature, I realized that if the ocean currents could keep San Francisco warm in winter and cool in summer, imagine what the heat currents of the Earth can do! As my thinking progressed I came to the conclusion that if the core of the Earth were cold, and much colder than it is now for example, the surface of the Earth would also be much much colder than it is now. I do not believe this argument can easily be refuted. The Earth’s sub-surface generates an extreme amount of heat with great thermal inertia. If this inertia were not there we would experience a much colder surface environment. But as I have discussed in the previous matter presented, the core heat must exist in a highly dynamic structure that would likely show variation throughout its entire structure. My main contention is that there are currents to the surface from the core that likely vary in both intensity and temperature and as they do the surface temperature also varies.
In the essay “Snowball Earth” I have made the point that the Earth likely undergoes enormous variations over millions of years that most probably result in long periods of volcanic productivity and eruption. These eruption probably are responsible for the creation of new land and are also responsible for the increase in surface temperature! After these eruptions subside however, the Earth’s core having expended great amounts of excess heat likely cools, and produces a powerful ice age as likely happened in the “Snowball Earth” phenomenon which was preceded by huge land formation and resulted afterwards in a massive cooling.
There is a small possibility that we are viewing some kind of core radiation phenomenon now which might account for the warming of the seas. However, to be honest, it would be very unlikely that we could see anything at all of such an event in the conscious space of a few hundred years since such cycles are likely of a much greater order. Yet, it would be well to keep in mind the possibility that excess Carbon Dioxide, produced by human kind, could well influence in some small way the core radiation at the level of the lithosphere. For though I maintain that we do not have a proven and demonstrable model for the man made causes of Global Warming as yet, there are some troubling aspects of this current global rise in temperature which does suggest that Carbon Dioxide emissions may in fact be influencing the surface temperature. It is likely true that any significant warming at the surface, will also have a corresponding warming of the lithosphere, so if in fact there is a human cause behind a greenhouse effect, it could very well influence the temperature of the lithosphere. What that might mean is difficult to say, but certainly some volcanic activity is possible, as well as seismic activity. There has been an increase of seismic activity over the past thirty years, though its causes are now disputed or attributed to the expansion of the surface rock as the ice melts above.