More problems for the climate models
Dec 11, 2015
Bishop Hill in Climate: Models, Climate: WG2

As I noted in my Spectator piece yesterday, the Met Office is really, really desperate to attribute floods and rainfall to global warming, particularly at this time of year when they can usually rely on taking advantage of a bit of human misery.

Unfortunately, some toad at the Lawrence Livermore laboratories in the US has rather gone and pooped the party by publishing a paper that shows that climate models are overestimating growth in rainfall (report here).

Lawrence Livermore researchers and collaborators have found that most climate models overestimate the increase in global precipitation due to climate change.

Specifically, the team looked at 25 models and found they underestimate the increase in absorption of sunlight by water vapor as the atmosphere becomes moister, and therefore overestimate increases in global precipitation.

The team found global precipitation increase per degree of global warming at the end of the 21st century may be about 40 percent smaller than what the models, on average, currently predict.

They are not the first to notice how bad climate models are, but it's good to be reminded of these things, particularly when there's rain - and the odd chief scientist - in the air.

Article originally appeared on (
See website for complete article licensing information.