worse than we thought – air pressure!

Climate predictions for many regions of the world may have to be rethought, following the discovery that global warming may have a bigger effect on air pressure than anyone thought.

Nathan Gillett at the University of East Anglia, UK, compared observed changes in air pressure in the northern hemisphere over the past 50 years with simulations from nine modern climate models.

The models only simulated around 10 per cent of the pressure changes actually observed. Even when Gillett factored in external influences such as ozone depletion, the changes were underestimated.

New Scientist, 24 Sep 2005