Anthony has a post reporting NOAA’s 2008 results, with NOAA reporting:
For 2008, the average temperature of 53.0 degrees F was 0.2 degree above the 20th Century average.
Anthony showed the following image from NOAA:
Readers need to keep in mind that there is a substantial “divergence” between NOAA US and NASA US temperatures as shown in the graphic below. Since 1940, NOAA’s US has increased relative to NASA’s US at a rate of 0.39 deg C/century, thus 0.27 deg C since 1940.
At present, we don’t know very much about the NOAA calculation. To my knowledge, they make no effort to make a UHI adjustment along the lines of NASA GISS. As I’ve mentioned before, in my opinion, the moral of the surfacestations.org project in the US is mainly that it gives a relatively objective means of deciding between these two discrepant series. As others have observed, the drift in the GISS results looks like it’s going to be relatively small compared to results from CRN1-2 stations – a result that has caused some cackling in the blogosphere. IMO, such cackling is misplaced. The surfacestations results give an objective reason to view the the NOAA result as biased. It also confirms that adjustments for UHI are required. Outside the US, the GISS meta-data on population and rural-ness is so screwed up and obsolete that their UHI “adjustment” is essentially random and its effectiveness in the ROW is very doubtful. Neither NOAA nor CRU even bother with such adjustments as they rely on various hokey “proofs” that UHI changes over the 20th century do not “matter”.