In 1978, NOAA published this graph showing nearly a full degree cooling in the southern latitudes between 1955 and 1970.
GISS has erased 90% of this cooling.
The next graph overlays the 1978 NOAA data in blue on the current GISS data. They bear no resemblance.
Much of the excuse for getting rid of northern hemisphere cooling was because they didn’t see it in the southern hemisphere. Apparently that was because they got rid of the southern hemisphere cooling first.
Then -after they got rid of the northern hemisphere cooling, the IPCC was able to throw out Briffa’s trees and create the hockey stick.
h/t to Alec aka Daffy Duck for the NOAA graph