UN climate change panel based claims on student dissertation and magazine article

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The revelation will cause fresh embarrassment for the The Intergovernmental Panel on Climate Change (IPCC), which had to issue a humiliating apology earlier this month over inaccurate statements about global warming.

The IPCC's remit is to provide an authoritative assessment of scientific evidence on climate change.

In its most recent report, it stated that observed reductions in mountain ice in the Andes, Alps and Africa was being caused by global warming, citing two papers as the source of the information.

However, it can be revealed that one of the sources quoted was a feature article published in a popular magazine for climbers which was based on anecdotal evidence from mountaineers about the changes they were witnessing on the mountainsides around them.

The other was a dissertation written by a geography student, studying for the equivalent of a master's degree, at the University of Berne in Switzerland that quoted interviews with mountain guides in the Alps.

The revelations, uncovered by The Sunday Telegraph, have raised fresh questions about the quality of the information contained in the report, which was published in 2007.

It comes after officials for the panel were forced earlier this month to retract inaccurate claims in the IPCC's report about the melting of Himalayan glaciers.

Sceptics have seized upon the mistakes to cast doubt over the validity of the IPCC and have called for the panel to be disbanded.

UN climate change expert: there could be more errors in report

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The IPCC’s 2007 report, which won it the Nobel Peace Prize, said that the probability of Himalayan glaciers “disappearing by the year 2035 and perhaps sooner is very high”.

But it emerged last week that the forecast was based not on a consensus among climate change experts, but on a media interview with a single Indian glaciologist in 1999.

The IPCC admitted on Thursday that the prediction was “poorly substantiated” in the latest of a series of blows to the panel’s credibility.

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