“Every 25 to 30 years the oceans undergo a natural cycle (the PDO) where the colder water below churns to replace the warmer water at the surface, and that affects global temperatures.”
Sorry Global Warming Alarmists, The Earth Is Cooling
By Peter Ferrara, Contributor to Forbes.com
(Excerpts) – Climate change itself is already in the process of definitively rebutting climate alarmists who think human use of fossil fuels is causing ultimately catastrophic global warming. That is because natural climate cycles have already turned from warming to cooling, global temperatures have already been declining for more than 10 years, and global temperatures will continue to decline for another two decades or more.
Central to these natural cycles is the Pacific Decadal Oscillation (PDO).
Don Easterbrook, Professor Emeritus of Geology at Western Washington University, publicly predicted in 2000 that global temperatures would decline by 2010. He made that prediction because he knew the PDO had turned cold in 1999, something the political scientists at the UN’s IPCC did not know or did not think significant.
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Thanks to Gordon Davies for this link