This is one of the many “adjustments” I found had been done to temperature data.
“The Australian Bureau of Meteorology declared 2013 the hottest year on record.”
But we find out later (graph below) that they took a cooling trend (blue) and turned it into a warming trend (red) …
“…This is significant. The Bureau now admits that it changes the temperature series and quite dramatically through the process of homogenisation*.
I repeat the Bureau has not disputed the figures. The Bureau admits that the data is remodelled*.”
*Those are just two examples of the way they spell in Britain and Australia. Many non-English-speaking countries adopt the same for their English writing. I put up with that for 17 years while working for a Norwegian Company -Steve