Almost every year, NASA finds a new
valid scientific reason excuse to further cool the past and warm the present, and they are still at it.
2000 version : www.giss.nasa.gov/data/update/gistemp/graphs/FigD.txt
2001 version : www.giss.nasa.gov/data/update/gistemp/graphs/FigD.txt
2012 version : data.giss.nasa.gov/gistemp/graphs_v3/Fig.D.txt
2014 version : data.giss.nasa.gov/gistemp/graphs_v3/Fig.D.txt
The next graph shows the hockey stick of changes they have made just since 2012.
The next graph shows the slope of changes per year to the temperature record since 2000. With each passing year, 1999 gets warmer by an average of 0.02 degrees, and 1944 gets colder by an average of 0.008 degrees. (h/t to Steve Case for the new graph.)
Climate experts on both sides of the debate say that these constant changes which cool the past and warm the present are first rate science, and that I am stupid to worry about massive data tampering which turns a long term cooling trend into a warming trend.
Science is the belief in the ignorance of the experts
– Richard Feynman