10 June 2008

Global Oceanic Currents And Climate Change

The hand wringers of climate change refer to the present scenario as Global Warming. Something else is also happening. We can call this scenario Global Cooling. The two work together because that is how the planetary climate engine works. You cannot have one without the other.

The weather on this planet is controlled by the sun and the oceans working in concert. Without this synergy much of the inhabited areas of the northern and southern hemispheres would be uninhabitable.

Simplistically speaking, the sun transmits most of its solar radiation to the earth along the equatorial belt, heating the oceans of the world and setting up outflowing currents that emanate north and south from the equator. At the same time, cold water from the polar regions sinks to the ocean floor establishing a flow pattern in the direction of the equator as they under ride the warm water flowing on the surface.

So, under ideal conditions a massive exchange of hot water from the equator and cold water from the poles occurs, giving we hominids the benign weather conditions that we enjoy over much of this planet.

All of this circulation occurs automatically because of the forces at play, hydrodynamics in other words. With climate change the dynamics change. British scientists have reported that the warm water currents flowing toward northwestern Europe have declined by 30% since the 1950's. There also appears to be a 50% reduction in the amount of cold water flowing from the poles. Computer models of this dynamic predict that the North Atlantic current will cease to exist in 50-100 years. National Geographic News, James Owen, November 30, 2005.

The same article points to the fact that the melting Arctic and Antarctic ice is diluting the salt water of the Arctic and Antarctic Oceans. The dynamic of circulation dependent on sinking cold water flowing south from the north pole, or north from the south pole, to bring the warm water of the equatorial seas north and south, is stalling as a result.

This fact will make the northern and southern hemisphere much colder within the next 50-100 years. The last time we humans had a warm cycle, the Medieval Warm Period, led into the Mini Ice Age, a period when life in the northern and the southern hemisphere became difficult at best.

Now there are 6B people on the planet. Will the mechanics of global climate change have an impact on us? Absolutely! We can expect war, pestilence, and famine to occur on an unprecedented scale. What can we do about it? Very little. That will become abundantly clear as conditions worsen in the marginal areas of this planet, where the huddled masses of the have-nots reside. http://www.vinlandpublishing.com/

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