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Sceptics denounce climate science

A group of US scientists says the accepted wisdom on climate change remains unproved.

They say rising greenhouse gas emissions may not be the main factor in global warming. They argue that temperature rise projections this century are "unknown and unknowable".

They claim it is "a media myth" to suppose that only a few scientists share their scepticism.

The scientists, convened by the American George C. Marshall Institute, were headed by former CIA director and defence secretary James Schlesinger, and include Richard Lindzen, professor of meteorology at Massachusetts Institute of Technology.

Their report Climate Science and Policy: Making the Connection says the IPCC's conclusions "have become politicised and fail to convey the underlying uncertainties that are important in policy considerations".

Its detailed criticisms of the IPCC include:

projections of climate change based on models and assumptions which "are not only unknown, but unknowable within ranges relevant for policy-making"
models which "do not adequately characterise clouds, water vapour, aerosols, ocean currents and solar effects"
a failure "to reproduce the difference in trends between the lower troposphere and surface temperatures over the past 20 years".

The authors conclude: "The IPCC simulation of surface temperature appears to be little more than a fortuitous bit of curve-fitting rather than any genuine demonstration of human influence on global climate."

Philip Stott, emeritus professor of biogeography at the University of London and a prominent British climate sceptic said.

 

"The authors challenge the key contradiction at the heart of the Kyoto Protocol, the global climate agreement - that climate is one of the most complex systems known, yet that we can manage it by trying to control a small set of factors, namely greenhouse gas emissions. Scientifically, this is not mere uncertainty: it is a lie."

 

"The problem with a chaotic coupled non-linear system as complex as climate is that you can no more predict successfully the outcome of doing something as of not doing something. Kyoto will not halt climate change. Full stop."

 

Click here to read the report in full.

 

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Last modified: February 05, 2006