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Satellites disagree with BoM that September 2013 was a record hot month for Australia

We have all seen and heard the media blitz on the subject – 2013 was hottest year on record in Australia, Bureau of Meteorology says
Most of us have little idea of the extent to which the BoM ACORN SAT temperature series has older data adjusted cooler to increase the warming trend.
This chart shows the monthly mean temperature ACORN SAT data that the BoM rely upon for their statements and shows the strongly cyclic nature of the 12 month average.

RSS satellites measure brightness temperature anomalies in the lower troposphere (TLT) – that thin skin of air centred on about 2 to 3km high. It is interesting that the rankings of the anomalies for the hottest months over Australia from the BoM go, Sep 2013 2.75 – Apr 2005 2.66 – Aug 2009 2.47.
However when you make global temperature anomaly maps for the RSS satellites lower troposhere series and eyeball the maps – the ranking looks to be – Aug 2009 hottest – Apr 2005 2nd hottest and Sep 2013 3rd hottest.
Aug 2009

Apr 2005

Sep 2013

RSS do not publish an Australian anomaly time series.
I put these maps up to show that all might not be as cut and dried as the BoM would have you believe.

4 comments to Satellites disagree with BoM that September 2013 was a record hot month for Australia

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