Here’s the most likely cause of global warming and/or cooling: changes in the Earth’s axis. Many scientists think that the Chilean earthquake changed the Earth’s rotation enough to change our climate–get us into our out of an ice age. Read on:
March 11, 2010: Pictures of widespread devastation leave no doubt: Last month’s 8.8 magnitude earthquake in coastal Chile was extremely strong. Indeed, say NASA scientists, it might have shifted the axis of Earth itself.
“According to our calculations, the quake moved Earth’s figure axis by about 3 inches (8 cm),” says geophysicist Richard Gross of the Jet Propulsion Laboratory in Pasadena, California.
If the Earth tilted over 3 inches, you probably think you would have noticed. But that’s not how the “figure axis” works. “The figure axis defines not how Earth is tilted, but rather how it is balanced,” says Gross.
Consider the following:
Earth is not a perfect sphere. Continents and oceans are distributed unevenly around the planet. There’s more land in the north, more water in the south, a great ocean in the west, and so on. As a result of these asymmetries, Earth slowly wobbles as it spins. The figure axis is Earth’s axis of mass balance, and the spin axis wobbles around it.
“The Chilean quake shifted enough material to change the mass balance of our entire planet,” Gross says.(more)