The scientist at the heart of the climate change scandal was under growing pressure to quit last night.
George Monbiot, a leading environmentalist, said Phil Jones should resign from the Climatic Research Unit over leaked emails that appear to show researchers suppressed scientific data.
More emails came to light yesterday, including one in which an American climatologist admitted it was a travesty that scientists could not explain a lack of global warming in recent years.
In another note, UK researchers dismissed the work of scientists challenging global warming as 'crap'.
Another appeared to call for pressure on the BBC after a reporter suggested that evidence for rising temperatures since 2001 was thin.
In one of the most damning messages, Professor Jones appeared to respond to the death of a climate sceptic with the words 'in an odd way this is cheering news!'.
The leak has been a huge embarrassment to the climate unit at the University of East Anglia, which is a global leader in its field.
Although there is no hint of evidence that climate change is not real, the emails appear to show researchers manipulating raw data and discussing how to dodge Freedom of Information requests.
Yesterday, Mr Monbiot, who writes on green issues, said the emails could scarcely be more damaging.