Not everybody agrees with the Bureau of Meteorology claim that Australia has just had its “hottest summer on record”March 15th, 2013 by Warwick Hughes
Scientists at NOAA/NWS/NCEP Climate Prediction Center & RS Information System, Inc. McLean, Virginia have developed a “…station observation based global land monthly mean surface air temperature dataset at 0.5° x 0.5° latitude-longitude resolution for the period from 1948 to the present…”
The gridded data – 1948-now: CPC GHCN/CAMS t2m analysis (land) – is available at KNMI Climate Explorer Monthly Observations page and a 515KB pdf paper can be downloaded.
Choosing CPC GHCN/CAMS t2m data from 45°South to 10°South and 110°East to 155°East and comparing with the data constructing the BoM “Time series graphs” for Mean Temperature for Australia for Summer – then downloading the “Raw data set”.
Here is the comparison graphed.
It is obvious that the CPC GHCN/CAMS t2m analysis produces a very different ranking of Australian historic summer heat. While 2013 was the hottest summer in the BoM heavily adjusted ACORN SAT data – the CPC GHCN/CAMS t2m analysis finds that 1983 was a clear winner for the hottest summer and 1973 missed out by only 0.00135°C.
Here are the rankings of the top ten hot summers for each data set.