Climate scientists who worked on the United Nations panel on global warming have hit out at "sloppy" colleagues from other disciplines who introduced a mistake about melting glaciers into the landmark 2007 report.

The experts, who worked on the section of the Intergovernmental Panel on Climate Change (IPCC) report that considered the physical science of global warming, say the error by "social and biological scientists" has unfairly maligned their work. Some said that Rajendra Pachauri, the panel's chair, should resign, though others supported him.

The IPCC report combined the output from three independent working groups, which separately considered the science, impacts and human response to climate change, and published their findings several months apart.

The report from working group two, on impacts, included a false claim that Himalayan glaciers would melt away by 2035, which was sourced to a report from campaign group WWF. The IPCC was forced to issue a statement of regret, though Pachauri and senior figures on the panel have refused to apologize for the mistake. 

Speaking on condition of anonymity, several lead authors of the working group one (WG1) report, which produced the high-profile scientific conclusions that global warming was unequivocal and very likely down to human activity, told the Guardian they were dismayed by the actions of their colleagues.