Monday, August 21, 2017

Delusions of climate

ABC once again uncritically report on some BOM figures that show "record" temperatures for the NT.
Here's the script...

Duty forecaster at the BOM in Darwin, Peter Markworth, said during the weekend Borroloola and the Tiwi Islands both experienced their hottest recorded August days.

Borroloola reached 37.7 degrees Celsius, beating its previous record of 37.3C, Mr Markworth said.

Batchelor, about 70 kilometres south of Darwin, hit 37C on Friday, beating its previous record of 36.8C.

On Saturday it hit 37.2C, breaking the record again.

The article ends by claiming: 

Mr Browning (BOM regional manager of climate services) said the NT had experienced a different weather pattern to normal. "We seem to have been seeing more of the winds coming from the east than the south-east," Mr Browning said. "The south-easterlies really bring the cool temperatures from down south, but we're just not seeing that as much." He said the warmer-than-expected weather seen in July and so far this month were "consistent with global warming signals".

Now there are quite a number of definitions of climate. One used by the WMO is as follows:
What is Climate?
Climate in a narrow sense is usually defined as the "average weather," or more rigorously, as the statistical description in terms of the mean and variability of relevant quantities over a period of time ranging from months to thousands or millions of years. The classical period is 30 years, as defined by the World Meteorological Organization (WMO). 
The "records" claimed for both Borroloola and Batchelor are from weather stations with less than 30 years of data!!!Unfortunately for the BOM these stations are unable to say anything about climate change as they have not measured more than one "Climate Cycle". Seriously bad science!

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