Negacionistas do Aquecimento Global

Believe global warming is not occurring or has ceased:

• Timothy F. Ball, former Professor of Geography, University of Winnipeg: “[The world’s climate] warmed from 1680 up to 1940, but since 1940 it’s been cooling down. The evidence for warming is because of distorted records. The satellite data, for example, shows cooling.” (November 2004) “There’s been warming, no question. I’ve never debated that; never disputed that. The dispute is, what is the cause. And of course the argument that human CO₂ being added to the atmosphere is the cause just simply doesn’t hold up…” (May 18, 2006; at 15:30 into recording of interview) “The temperature hasn’t gone up. … But the mood of the world has changed: It has heated up to this belief in global warming.” (August 2006) “Temperatures declined from 1940 to 1980 and in the early 1970’s global cooling became the consensus. … By the 1990’s temperatures appeared to have reversed and Global Warming became the consensus. It appears I’ll witness another cycle before retiring, as the major mechanisms and the global temperature trends now indicate a cooling.” (Feb. 5, 2007)

• Robert M. Carter, geologist, researcher at the Marine Geophysical Laboratory at James Cook University in Australia: “the accepted global average temperature statistics used by the Intergovernmental Panel on Climate Change show that no ground-based warming has occurred since 1998 … there is every doubt whether any global warming at all is occurring at the moment, let alone human-caused warming.

• Vincent R. Gray, coal chemist, climate consultant, founder of the New Zealand Climate Science Coalition: “The two main ‘scientific’ claims of the IPCC are the claim that ‘the globe is warming’ and ‘Increases in carbon dioxide emissions are responsible’. Evidence for both of these claims is fatally flawed.”

Believe accuracy of IPCC climate projections is inadequate:

Individuals in this section conclude that it is not possible to project global climate accurately enough to justify the ranges projected for temperature and sea-level rise over the next century. They do not conclude specifically that the current IPCC projections are either too high or too low, but that the projections are likely to be inaccurate due to inadequacies of current global climate modeling.

• David Bellamy, environmental campaigner, broadcaster and former botanist: a doubling of atmospheric CO₂ “will amount to less than 1°C of global warming [and] such a scenario is unlikely to arise given our limited reserves of fossil fuels—certainly not before the end of this century.”
• Hendrik Tennekes, retired Director of Research, Royal Netherlands Meteorological Institute: “The blind adherence to the harebrained idea that climate models can generate ‘realistic’ simulations of climate is the principal reason why I remain a climate skeptic. From my background in turbulence I look forward with grim anticipation to the day that climate models will run with a horizontal resolution of less than a kilometer. The horrible predictability problems of turbulent flows then will descend on climate science with a vengeance.”
• Antonino Zichichi, emeritus professor of physics at the University of Bologna and president of the World Federation of Scientists : “models used by the Intergovernmental Panel on Climate Change (IPCC) are incoherent and invalid from a scientific point of view”.

 fonte: List of scientists opposing the mainstream scientific assessment of global warming .