May 21, 2013
In a story on the New York Times, Andy Revkin used Hansen’s global temperature plot to blog “Cooler Year on a Warming Planet”.
A better title would have been “A cooler year on a cooling planet.” The Pacific Decadal Oscillation switched from its warm mode (1977-1998) to its cool mode in 1999 and we’ve had global cooling since. Each time this has happened in the past 100 years we've had three decades of cool global climate. We switched from the Pacific cool mode to the warm mode in 1977 (The Great Climate Shift) and that ended in 1998 with the switch to the Pacific cool mode. We’re going to have three decades of global cooling, just like we've always had when this happens. CO2 has nothing to do with it.
We’ve been doing this for hundreds of years, long before atmosphere CO2 increased from human emissions. The isotope record from the Greenland ice core (see below) confirms the 25-30 years oscillating pattern between warm and cool. We are right on schedule for 30 years of global cooling.
(see much more at icecap.us)
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