Some interesting analysis of the temperature records in the State of Victoria in Australia from Ken Stewart. The analysis seems to have been prompted by a statement by Australia's Bureau of Meteorology that adjustments to the raw station data should be random because they were fixing random station moves:
On the issue of adjustments you find that these have a near zero impact on the all Australian temperature because these tend to be equally positive and negative across the network (as would be expected given they are adjustments for random station changes).
Stewart has tested this and foundsomething rather different:
By these calculations (averaging the trend at each site) the raw trend is 0.35 degrees C per 100 years, and the [corrected] state trend is 0.83C. That’s a warming bias of 133%!
Worth a look, I would say.
(H/T David Stockwell)