Gavin shows 1.5C Northern Hemisphere surface temperature warming, which he accomplished using a couple of tricks. Yesterday I showed how he shifted the baseline and cooled the past for pre-1969 temperatures, which gave him an extra 0.3C of imaginary warming.
This is the actual comparison, without the baseline shift.
Now lets look at the tricks he uses since 1969. He shows a huge discontinuity at the PDO shift of 1977, which does appear in Alaska, but does not appear in the US, Greenland or European temperature records.
I created a complete 1880-2013 Northern Hemisphere land temperature record by merging and normalizing temperatures from 1975 NAS (1880-1969), NOAA Angell (1970-1979) and UAH (1979-2013) Note that the NOAA data does not show a discontinuity at 1977.