Wednesday, March 09, 2022

A reminder: record rains and climate change

I wrote this in 2011 (unfortunately without a link to the CSIRO report it extracts):

In terms of the climate change debate, I have never paid all that much attention to the particular regional rainfall changes for Australia forecast by CSIRO and the like. I just always assumed that regional forecasts under climate models were going to be more rubbery than the general effect of increased heat waves, which I consider a big enough worry. This explains why I wasn't really aware that there had been predictions of both extended droughts and intense rainfall under AGW. But as Tim Lambert notes, the report Bolt tries to slur as being warmenist propaganda that puts the emphasis all on drought, has this:

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.
Very prescient, as it turns out. (Not to say that you can directly attribute any particular extreme weather event to AGW yet.)

Last week, I pointed out a different paper which indicated the same thing (modelling indicates longer droughts but broken by intense rain) at Catallaxy, a.k.a the "centre right" blog where climate science goes to die. This was followed by the glib "so, everything's consistent with AGW" response that shows that even though a weather event may (after all) be consistent with climate modelling of some years ago, they will insist on claiming that it either isn't, or that it doesn't matter.

And what is Andrew Bolt doing today, 11 years later?:

 


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