Essay by four NASA scientists explains why 2005 (not 1998) was the hottest year, what caused recent cold snap, and the source of the “gullibility” of those “so readily convinced of a false conclusion, that the world is really experiencing a cooling trend”
The bottom line is this: there is no global cooling trend. For the time being, until humanity brings its greenhouse gas emissions under control, we can expect each decade to be warmer than the preceding one. Weather fluctuations certainly exceed local temperature changes over the past half century. But the perceptive person should be able to see that climate is warming on decadal time scales.
The quote and figure are from a fascinating draft essay, “If It’s That Warm, How Come It’s So Damned Cold?” by NASA’s James Hansen, Reto Ruedy, Makiko Sato, and Ken Lo. It is posted on Hansen’s Columbia University website, and he sent out a note to his email list asking for comments: