Hundreds of scientists and government officials from around the world are meeting in Bangkok, preparing to issue a May 4 report on what steps should be taken to combat global warming. But a new study released May 1 showed that one of the group's predictions on climate change, made in an earlier February report, may already be too conservative.

The Intergovernmental Panel on Climate Change (IPPC) had said that Arctic sea ice was shrinking by as much as 5.4 percent per decade. At that rate, it could disappear entirely toward the end of this century.

But new analysis from scientists at the National Center for Atmospheric Research and the National Snow and Ice Data Center (NSIDC), both in Boulder, Colo., shows that the rate from 1953 to 2006 was more like 7.8 percent per decade. The earlier IPCC models suggested that about half the polar melting was due to global warming. The NSIDC study says greenhouse gases may play an even more significant role.

"Because of this disparity, the shrinking of summertime ice is about 30 years ahead of the [IPCC] climate model projections,'' said Ted Scambos, an NSIDC scientist, in an article by the Bloomberg news service.

Meanwhile, media reports from Bangkok indicate that the IPCC meeting had become contentious, as countries including the United States and China strove to shape the document to their liking. The report, the third of four the IPCC will issue this year, won't be binding, but it will influence actions taken by governments, including the G-8 summit of industrialized countries in June and negotiations on updating the 10-year-old Kyoto climate treaty in December, said a story from the BBC. It quoted UN Environment Programme spokesman Michael Williams as saying:

"The IPCC plays an incredibly important role in the political negotiations so people can point and say 'Look, this is what is going to happen in 50 years, these are the options available for us to take actions.'"

A Reuters correspondent talked to an unnamed delegate willing to discuss the meeting's contentious atmosphere.

"This process is agreement by exhaustion. It's not the smartest way to work out key issues which should be driving the world forward, but that's the way it's done. ... nothing is agreed until it's all agreed. That's where the negotiation by exhaustion comes in. It's the last person standing here that wins."

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