In 2005, NASA showed that Antarctica had been strongly cooling for 20 years
Gavin Schmidt (current GISS head) reported that Antarctica temperatures “decreased significantly”
Shindell and Schmidt 2004
Shindell, D.T., and G.A. Schmidt 2004. Southern Hemisphere climate response to ozone changes and greenhouse gas increases. Geophys. Res. Lett. 31, L18209, doi:10.1029/2004GL020724.
While most of the Earth warmed rapidly during recent decades, surface temperatures decreased significantly over most of Antarctica.
But that story wan’t going to scare anyone into giving up their money, so in 2007 they simply changed Antarctica’s history from cooling to warming.