In actuality, we now have adequate proxy data from other sources, most particularly from Fredrick Ljungqvist and David Anderson. Their separate publications agree that there has been little if any temperature rise since about 1940! However, there was a real temperature increase between 1920 and 1940, which can be seen also in the various proxy as well as thermometer data.
Read more: http://www.americanthinker.com/2014/01/the_inventor_of_the_global_warming_hockey_stick_doubles_down.html#ixzz2r3OBJvlh
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