ACORN-SAT- the gift that keeps on giving!
Unfortunately for doomsayers, the fact that 2013 was the hottest year on record in Australia is no evidence for the effects of greenhouse warming. In fact, it is the very opposite.
Why? Any sort of warming will eventually produce the hottest year on record. But warming due to the enhanced greenhouse effect is quite special. Warming due to greenhouse gases is evidenced by
“greater warming of night time temperatures than daytime temperatures”
amongst other things, according to Dr Karl Braganza (http://theconversation.com/the-greenhouse-effect-is-real-heres-why-1515)
I discussed this in April last year. Now, with the updated data for 2013, it’s time for a reality check to see whether there is now evidence of greenhouse warming in Australia (a region as large as Antarctica, Greenland, the USA, or Europe, and supposed to be especially vulnerable to the effects of global warming.)
Once again I am using data straight from the Bureau’s website.
Fig. 1: Monthly maxima and minima with 12 month smoothing, December 1978 – December 2013, from http://www.bom.gov.au/climate/change/index.shtml#tabs=Tracker&tracker=timeseries&tQ%5Bgraph%5D=tmax&tQ%5Barea%5D=aus&tQ%5Bseason%5D=01&tQ%5Bave_yr%5D=0
For the past 35 years, there is much LESS warming of night time temperatures than daytime temperatures. And the divergence is increasing:
Sorry, but this is not evidence of greenhouse warming over the period of the satellite era, when greenhouse gases have been increasing rapidly. It is merely evidence of warming.
Tags: Australia, Australia’s Bureau of Meteorology, bom, Bureau of Meteorology, climate, greenhouse gases, greenhouse warming, Karl Braganza, maximum temperatures, minimum temperature anomaly, Surface Air Temperatures, temperature anomaly, temperature change