Nature trumpets “2014 was the hottest year on record” and cites the Japan Meteorological Agency, the World Meteorological Organization, and the National Oceanic and Atmospheric Administration (NOAA). However, NOAA and several other principal terrestrial temperature datasets – which are subject to measurement, coverage, and bias uncertainties and have been repeatedly revised in a questionable fashion over the past year to show ever greater rates of warming– have not yet reported their December 2014 values.Not to mention that the Satellite data sets report no warming at all over the last 18 years.
It is immediately apparent that 2014 was not “the warmest year on record.” Several previous years had been warmer, including the El Niño years 1998 and 2010.
Figure 1 also shows the rate of global warming since 1979 is the equivalent of just 1.3° Celsius per century – hardly anything to worry about.
Since 1990, when the Intergovernmental Panel on Climate Change (IPCC) first predicted how temperatures would evolve in the short to medium term, the measured rate of global warming – taken as the mean of all five principal global-temperature datasets – has been just under half of the warming IPCC had predicted with “substantial confidence” that year (Figure 2).
Given that not all of the data sets have updated for December, this might seem premature to you. I'm certain that it's entirely coincidental that the report was issued immediately before the State Of The Union Address. Oh hum - just more politicized junk science from the Democrats.