You might have read last week the scientific report that as a result of climate change butterflies are emerging 10 days earlier than 65 years ago.
It turns out that once again this is the result of modelling not observation, and that the modelling is based on a single temperature record at Laverton on Melbourne's outskirts... chosen to accentuate the effects of urbanisation.
Andrew Bolt looks at the data:
Last week brought the latest shocking news about global warming’s horrific effects:
Researchers have found that because of a rise in temperature, caused by an increase in greenhouse gas emissions by humans, the common brown butterfly now emerges from its cocoon 10 days earlier than it did 65 years ago.
Alarmist Professor David Karoly seized on the study as proof of man-made global warming:
This new work has tied the earlier emergence of butterflies directly to a regional temperature increase, and has tied the temperature increase very strongly to increases in greenhouse gas concentrations caused by humans...
Two things are strange about this claim of early-emerging butterflies. First, it relies entirely on modelling the effects on butterflies, using old temperature records, rather than on a history of direct observation.
Read the full article here
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