Pacific Decadal Oscillation (PDO)

Check out this Canadian article concerning the roughly 25 year cycles of warming and cooling that have been going on since at least 1650. Warning: this article contains serious science, not Algore/Chickenlittle fear mongering. The bottom line is the following:

The new Jason oceanographic satellite shows that 2007 was a “cool” La Nina year—but Jason also says something more important is at work: The much larger and more persistent Pacific Decadal Oscillation (PDO) has turned into its cool phase, telling us to expect moderately lower global temperatures until 2030 or so.

Golly, do you suppose there are more important forces at work in the world than the by-products of human activity? Really? No kidding....