March 9, 2009

Huge Urban Heat Island UHI contamination in Hadley Centre-Jones-IPCC CRUT3 land temperature data over Eastern China

Errors in IPCC climate science

Now that the NASA-UAH satellite temperature data extends over a clear 30 years 1979-2008, this is a timely opportunity to check again the old IPCC canard that the various global temperature datasets are in agreement. In this case I compare the Hadley Centre CRUT3 land only data 1979-2008 with the NASA MSU LT data from University of Alabama at Huntsville, all data downloaded from the KNMI Climate Explorer.

For this grid-box over Eastern China 110 to 120 degrees East and 20 to 40 degrees North, satellites show the lower troposphere warms at 0.20 degrees per decade while the Hadley Centre land data warms at 0.46 degrees per decade. This suggests that there is 0.26 degrees per decade of urban warming in the Hadley Centre-IPCC data. A rate equivalent to 2.6 degrees per century.
This is twenty years after the UHI contamination in these Jones et al datasets was brought to the authors attention by Dr Fred Wood.

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