Article Tags: World Temperatures
A new SPPI paper examines the raw and adjusted historical temperature records for Pennsylvania and finds the mean temperature trend from 1895 to 2009 to be minus .08°C/century, but after unexplained adjustments the official trend becomes positive .7°C/century.
The difference between the raw and adjusted data exceeds the .6°C/century in global warming claimed for the 20th century. An example of the raw and adjusted datasets is shown above for Lebanon, PA:
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Source: hockeyschtick.blogspot.com