Deres konklusioner er, at lave skyer er den vigtigste faktor i kontrollen af temperaturen, og at at computermodeller ikke gælder som eksperimentelle beviser.
In a paper ‘No experimental evidence for the significant anthropogenic climate change’, a team of scientists at Turku University in Finland determined that current climate models fail to take into account the effects of cloud coverage on global temperatures.
Models used by official bodies such as the Intergovernmental Panel on Climate Change (IPCC) “cannot compute correctly the natural component included in the observed global temperature,” the study said, adding that “a strong negative feedback of the clouds is missing” in the models.
Adjusting for the cloud coverage factor and accounting for greenhouse gas emissions, the researchers found that mankind is simply not having much of an effect on the Earth’s temperature.
The study’s authors make a hard distinction between the type of model favored by climate scientists at the IPCC and genuine evidence, stating “We do not consider computational results as experimental evidence,” noting that the models often yield contradictory conclusions.
Japanese researchers at the University of Kobe arrived at similar results as the Turku team, finding in a paper published in early July that cloud coverage may create an “umbrella effect” that could alter temperatures in ways not captured by current modeling.