January 22, 2013
Remember the news about "the warmest July since 1895?"
Scam. Here's a little sample of how it works...
The Science and Public Policy Institute has been asked to comment on the apparent inconsistency between the news that July 2012 was the warmest July since 1895 in the contiguous United States and the news that the Meteorological Office in the UK has cut its global warming forecast for the coming years. The present paper is a response to that interesting question.Posted by John Weidner at January 22, 2013 8:02 AM
Early in August 2012, the NOAA issued a statement to the effect that July 2012 had been the hottest month in the contiguous U.S. since records began in 1895. NOAA said the July 2012 temperature had been 77.6 degrees Fahrenheit, 0.2 F° warmer than the previous July record, set in 1936.
However, NOAA's statement was based on incomplete information that has since been revised. Updated data available at the NCDC website (NCDC is the division of NOAA that maintains national climatic data for the United States) show that July 2012's temperature was not 77.6 °F, as NOAA had previously claimed, but 76.9 °F, half a degree Fahrenheit below the record 77.4 °F set in July 1936
Even this revised value may be a considerable exaggeration. In response to criticisms of the siting of U.S. temperature monitoring stations, in 2008 NOAA introduced a new network of carefully sited stations with up-to-date, standardized, properly monitored equipment. The Climate Reference Network, as it is called, shows that the July temperature for the continental U.S. was 75.6 °F, lower by 1.3 °F than stated by the NOAA in August 2012 based on incomplete data from its older, poorly-sited stations influenced by urban heat-island effects, and lower by 2 full Fahrenheit degrees than the 77.6 °F that NOAA had published in August 2012. .
For some unaccountable reason, NOAA has not issued any statement correcting its original false claim that July 2012 was the warmest July since 1895. Indeed, the accurately-sited and properly-maintained Climate Reference Network is consistently delivering significantly lower contiguous-US temperatures than the older network: yet, again unaccountably, NOAA finds it expedient not to draw attention to the inconvenient results from its new network....