This graphs shows the amendments to the real temperature record - the NOAA have added this sickle-shaped pattern on the data to suit their political masters. It’s completely fabricated.
Note that these fabricated, not true, amendments include a -0.1 degree C change to 1930’s/1940’s data and a +0.3 degree C change to most recent data. This turns the cooling trend since the 1930s into a straight increase.
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The next graph shows the difference between the 2012 version of the GISS US temperature graph, and 1999 version.
