In 1997, GISS showed the 1880-1996 Southern Hemisphere land temperature trend at .43ºC/century. Now it is 0.65ºC/century. That is an increase of 52% in the same data set since 1997.
Archived 1997 version : http://www.giss.nasa.gov/Data/GISTEMP/ZonAnn.Ts.txt
2013 version : http://data.giss.nasa.gov/gistemp/tabledata_v3/ZonAnn.Ts.txt
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Not technically Mann-made global warming, since it was Mann’s friends, rather than Mann, himself who made it.. Mann’s mates-made global warming, I guess.
Odd that they always have to decrease the temperatures in the 1930’s more than other decades.