A draft of the next report of the Intergovernmental Panel on Climate Change (IPCC) has been leaked on climate skeptic websites.
The 14-chapter draft report was posted on a US-based blog site called stopgreensuicide and then posted on another site critical of climate science.
The leaker and other climate sceptics have isolated one section of the draft to suggest that cosmic rays such as those of the Sun may have a greater influence on warming than had been claimed.
Professor Steve Sherwood, the director of the Climate Change Research Centre at the University of NSW, was the lead author of the chapter in question.
He says the idea that the chapter he authored confirms a greater role for solar and other cosmic rays in global warming is "ridiculous."
In a statement released today, the IPCC said:
Material appearing to be the draft of an Intergovernmental Panel on Climate Change (IPCC) report has been published on several websites.
The IPCC is looking into this and will issue a more detailed statement later.