Wednesday, January 25, 2012

Andrew wrong a year ago: still wrong today

It was almost exactly a year ago, after the Queensland floods,  that Andrew Bolt had a post up alleging that a 2009 report by the Queensland Office of Climate Change had only mentioned drought, not floods.  He was following the lead of another blogger who had originally made the claim.

As Tim Lambert pointed out (as I previously noted here) this was simply wrong:  the claim related to one chapter of the report only.   In fact, the report said that intensification of individual rainfall events in South East Queensland was predicted in at least one paper, even if overall there may be less rainfall in future over most of Queensland :
Climate change is also likely to affect extreme rainfall in south-east Queensland (Abbs et al. 2007). Projections indicate an increase in two-hour, 24-hour and 72-hour extreme rainfall events for large areas of south-east Queensland, especially in the McPherson and Great Dividing ranges, west of Brisbane and the Gold Coast. For example, Abbs et al. (2007) found that under the A2 emissions scenario, extreme rainfall intensity averaged over the Gold Coast sub-region is projected to increase by 48 per cent for a two-hour event, 16 per cent for a 24-hour event and 14 per cent for a 72-hour event by 2070. Therefore despite a projected decrease in rainfall across most of Queensland, the projected increase in rainfall intensity could result in more flooding events.
Did Andrew ever acknowledge such an error in his post?  Not as far as I can see.  In fact, he posts and moves on; just in the same way he never acknowledged at his blog that Anthony Watts' own paper proved his claims about the US temperature record being largely due to bad siting of weather stations.

So, today, after a couple of days of intense rainfall in South East Queensland, what do we find Andrew Bolt posting about again today?  Yes - "warmists" never predicted heavy rain and floods as a part of global warming.

No Andrew, this is not right.  Here is another paper from 2007, at the height of the drought (which, incidentally, was likely itself record breaking - there was a paper about this I have linked to before, and I'll track it down later) which concluded that all models showed:
Australia shows a shift towards warming of temperature extremes, particularly a significant increase in the number of warm nights and heat waves with much longer dry spells interspersed with periods of increased extreme precipitation, irrespective of the scenario used.
It is hard to credit Bolt as having any honesty at all in this debate when he never corrects his claims.

No comments: