ice free planet

The world could be tracking towards irreversible climate change as warming takes place much quicker than previously thought, an Adelaide academic has warned. Climate change expert Barry Brook, of Adelaide University, told a Canberra conference — Imagining the Real Life on a Greenhouse Earth — atmospheric carbon dioxide levels were headed towards 600 parts a million, and forecast global temperature increases of up to six degrees.

Professor Brook said a global temperature increase of three degrees might result in the collapse of the Amazon rainforest, a four-degree increase would lead to the displacement of hundreds of million of people and the extinction of up to half the world’s species, and a five-degree increase would create an ice-free planet and sea-level increases of 80 metres.
The Age, 12 Jun 2008