You may have heard this from a conservative friend already, but NASA recalculated its temperature records for 1998 and the year is no longer the hottest in the 48 states (1934 is). Hill Heat has a good synopsis of the political fallout- sometimes more interesting than the science itself. RealClimate has a good rundown on the science. What your conservative friend did not tell you is that the differences are statistically insignificant. Anyway, the problem with the NASA data was found by a blogger from http://www.climateaudit.org/. Nice work, Steve McIntyre. You get the gold star for analyzing primary data and for paying attention.
The data record still indicates that temperatures on the surface of the Earth are getting warmer. The data corrections are for anomalies of surface air temperatures for the 48 states and do not change the fact that temperatures in 19 of the past 26 years globally have been setting records, and that 2005 was the warmest year on record for the globe. According to RealClimate:
More importantly for climate purposes, the longer term US averages have not changed rank. 2002-2006 (at 0.66 Continue reading