Et av kronargumentene til klimaskeptikere er at Solen indirekte står for hoveddelen av global oppvarming, og at å redusere CO2 -utslipp derfor er meningsløst og uten effekt. Channel4 laget i 2007 en dokumentar ved navn «The Great Global Warming Swindle» som hevdet at kosmisk stråling var hovedårsaken til den globale oppvarmingen:
[…] the amount of low altitude cloud seems to follow changes in the rate at which cosmic rays fall on Earth.[…]Such particles produce ionizing radiation in the atmosphere; under certain conditions water droplets condense on the ions formed […]
[…]
The observation that low cloud cover decreases as the cosmic ray rate drops led to the proposal that ionization from cosmic rays is responsible for the production of clouds i.e. less ionization leads to less cloud. The rate at which cosmic rays fall on the Earth has been observed to decrease over the past century or so.
[…]
So if cosmic rays produce clouds and there are fewer cosmic rays nowadays we will have less cloud cover than we once had, allowing more of the sun’s heat to penetrate to the Earth’s surface and produce the observed global warming.
Og hva har Solen med dette å gjøre?
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