CERN Update: Cosmic Ray Data will Force Climate Models to be ‘Substantially Revised'
...The first results from the lab’s CLOUD (“Cosmics Leaving OUtdoor Droplets”) experiment published in Nature today confirm that cosmic rays spur the formation of clouds through ion-induced nucleation. Current thinking posits that half of the Earth’s clouds are formed through nucleation. The paper is entitled Role of sulphuric acid, ammonia and galactic cosmic rays in atmospheric aerosol nucleation.

This has significant implications for climate science because water vapour and clouds play a large role in determining global temperatures. Tiny changes in overall cloud cover can result in relatively large temperature changes.

Unsurprisingly, it’s a politically sensitive topic, as it provides support for a “heliocentric” rather than “anthropogenic” approach to climate change: the sun plays a large role in modulating the quantity of cosmic rays reaching the upper atmosphere of the Earth.

CERN’s director-general Rolf-Dieter Heuer warned his scientists “to present the results clearly but not interpret them”. Readers can judge whether CLOUD’s lead physicist Jasper Kirkby has followed his boss’s warning.

“Ion-induced nucleation will manifest itself as a steady production of new particles that is difficult to isolate in atmospheric observations because of other sources of variability but is nevertheless taking place and could be quite large when averaged globally over the troposphere.”...

...“[I]t is clear that the treatment of aerosol formation in climate models will need to be substantially revised, since all models assume that nucleation is caused by these vapours [sulphuric acid and ammonia] and water alone...