Month of May, Global Temperature Recap

Month of May, Global Temperature Recap « Watts Up With That?

Global Data All In - NASA GISS Biggest Outlier Again
By Joseph D’Aleo, CCM, AMS Fellow
All the data sources have now reported for global May temperatures with Hadley coming in today. University of Alabama MSU was the coldest with a -0.18C. RSS MSS was a close second with -0.083C. Hadley had a +0.278C and NASA GISS came in at +0.36C.

UAH and RSS MSU satellite data uses a base period of 1979-1998. NASA uses the coldest period of the last century 1951 to 1980. Hadley uses 1961 to 1990 as a base period. Obviously satellite provides the best coverage of the low and middle latitudes land and oceans. The other data bases are at the mercy of the country governments and of spotty imperfect ocean temperature measurements.