Two eminent British scientists who questioned the accuracy of a Channel 4 programme that claimed global warming was an unfounded conspiracy theory have received an expletive-filled tirade from the programme maker.

In an e-mail exchange leaked to The Times, Martin Durkin, the executive producer of The Great Global Warming Swindle, responded to the concerns of Dr Armand Leroi, from Imperial College, and Simon Singh, the respected scientific author, by telling them to “go and f*** yourself”.

The tirade has caused Dr Leroi to withdraw his cooperation from another Channel 4 project with Mr Durkin on race, The Times has learnt.

The programme, broadcast by Channel 4 last Thursday, featured a number of scientists who disputed the consensus on the causes of global warming.

Dr Leroi was particularly concerned about a segment that featured a correlation between solar activity and global temperatures, which was based on a 1991 paper in the journal Science by Eigil Friis-Chris-tensen. He was surprised that the programme failed to mention that while these findings look convincing superficially, they have been revealed as flawed by subsequent research by Peter Laut.

Dr Leroi e-mailed Mr Durkin about his use of data, concluding: “To put this bluntly: the data that you showed in your programme were . . . wrong in several different ways.” He copied Mr Singh into the exchange.

Mr Durkin replied to both later that morning, saying: “You’re a big daft cock.” Less than an hour later, Mr Singh, who has worked for the BBC, intervened to urge Mr Durkin to engage in serious debate. He wrote: “I suspect that you will have upset many people (if Armand is right), so it would be great if you could engage in the debate rather than just resorting to one-line replies. That way we could figure out what went wrong/ right and how do things better/ even better in the future.” Mr Durkin replied nine minutes later: “The BBC is now a force for bigotry and intolerance . . . Since 1940 we have had four decades of cooling, three of warming, and the last decade when temperature has been doing nothing.

“Why have we not heard this in the hours and hours of shit programming on global warming shoved down our throats by the BBC?

“Never mind an irresponsible bit of film-making. Go and f*** yourself.”

Last night Dr Leroi said that he was amazed at the rudeness of Mr Durkin’s reply.

“It was rather a shocking response,” Dr Leroi said. “It was my intention to make a film with Martin Durkin and [the production company] Wag, but that is something I am seriously reconsidering now. I am no climate scientist, but I was very concerned at the way that flaws in these data were brushed over.”

He said that the global warming film had glossed over flaws in data that it used to make its case, and that it was critical that a documentary about a subject as controversial as race and biology did not make similar mistakes.

“As the subject of our proposed film was race, it is such a sensitive topic that it requires great care and great balance. That he has shown so little respect for scientific consensus and such little nuance is a cause for great concern. I cannot imagine it will go ahead now.”

The film would have addressed Dr Leroi’s thesis that race is a biologically meaning-ful and medically valuable concept, a view that is highly controversial among scientists.

Last night Mr Durkin apologised for his langauge. “As far as I was concerned these were private e-mails. They arrived when I was quite tired having just finished the programme in time for transmission,” he said.

“Needless, to say, I regret the use of intemperate language. It is so unlike me. I am very eager to have all the science properly debated with scientists qualified in the right areas and have asked Channel 4 if they will stage a live debate on this subject.”

Where Channel 4 got it wrong over climate change

Claim: Ice core data shows that carbon dioxide levels rise after temperatures go up, not before

Fact: This is correct, but climate scientists have a good explanation. There is a substantial feedback effect – initial small rises in temperature lead to substantial release of carbon dioxide from natural reservoirs in the oceans, which then produce much steeper warming later on

Claim: Temperatures in the troposphere, the lower part of the atmosphere, have not risen as predicted by the models

Fact: This was once the case, but it has been resolved now that initial measurement errors have been corrected

Claim: Temperatures rose for the first part of the century, then cooled for three decades before warming again. There is no link to carbon dioxide

Fact: Temperatures did follow this pattern, but again there is a good explanation. The mid-century effect fall came about chiefly because of sulphate aerosols – particles that have a cooling effect on the atmosphere. These are no longer produced so heavily by industry because of environmental regulations to combat other problems, such as acid rain

Source: Mark Henderson, Science Editor

Times Recommends

• Times Christmas appeal: Letter from the Editor
• Conferences — what a waste of money
• Schools supremo learns a painful lesson