December 18, 2009

Apparently the Hadley Center for Climate Change based at the headquarters of the British Meteorological Office in Exeter (Devon, England) and the Climate Research Unit of the University of East Anglia (CRU) in Norwich (England) cherry-picked Russian climate data, according to a study issued by the Moscow-based Institute of Economic Analysis (IEA).

The IEA report shows that Russian meteorological-station data in the last 130 years did not substantiate the rate of warming on Russian territory suggested by the Hadley Climate Research Unit Temperature (HadCRUT) database, which has now been partially released:

  • Russian meteorological stations cover most of the country's territory, while the HadCRUT used data from only 25 percent of such stations in their calculations.
  • Over 40 percent of Russian territory was not included in their global temperature calculations even though there was no lack of meteorological stations and observations.
  • The data of stations located in areas not listed in the HadCRUT survey often shows slight cooling or no substantial warming in the second part of the 20th century and the early 21st century.

IEA analysts found that the climatologists used the data of stations located in large populated centers that are influenced by the "urban heat effect" more frequently than the unbiased data from the stations located in less populated places:

  • The IEA authors calculated that the scale of actual warming for the Russian territory in 1877-1998 was probably exaggerated by 0.64°C.
  • Since Russia accounts for 12.5 percent of the world's land mass, such an exaggeration for Russia alone should have an impact on the IPCC claim that the global temperature in the last century has risen by 0.76°C.

If similar procedures have been used for processing climate data from other national data sources, the impact on the rate of change in global temperature would be considerable.

The IEA report concludes that it is necessary to recalculate all global temperature data in order to assess the real rate of temperature change during the last century. Global temperature data will have to be modified because the calculations used by Copenhagen Conference on Climate Change analysts are based on HadCRUT research.

Source: Andrei Illarionov, "New Study: Hadley Center and CRU Apparently Cherry-picked Russia's Climate Data," Cato Institute, December 17, 2009.


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