By Warwick Hughes
So sceptics have been correct for decades.
Yes you have to pinch yourself, the old canard so long clung to by the IPCC, that the urban influence in large area gridded data is “an order of magnitude less than the warming seen on a century timescale” is now severely compromised.
The IPCC drew that conclusion from the
Jones et al 1990 Letter to Nature which examined temperature data from regions in Eastern Australia, Western USSR and Eastern China, to conclude that “In none of the three regions studied is there any indication of significant urban influence.” That has led to the IPCC claim that for decades, urban warming is less than 0.05 per century.
Now
Jones et al 2008 are saying in their Abstract, “Urban-related warming over China is shown to be about 0.1 degree per decade”, hey that equates to a degree per century.
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