Reported By wattsupwiththat.com on 2015-09-24
“Overall, from 1880 to the present, approximately 66% of the temperature data in the adjusted GHCN temperature data consists of estimated values produced by adjustment models, while 34% of the data are raw values retained from direct measurements…. The estimates produced by NOAA for the GHNC data introduce a warming trend of approximately a quarter degree C per century…. Approximately 7% of the raw data is discarded. If this data were included as-is in the final record it would likely introduce a warming component from 1880 to 1950, followed by a cooling component from 1951 to the present….”