Compare that to the 1000 year cosmic ray intensity above. (judithcurry.com)
The scientists» main approach was simple: to look at solar output and cosmic ray intensity over the last 30 - 40 years, and compare those trends with the graph for global average surface temperature. (news.bbc.co.uk)
Our model suggests that the effect of changes in cosmic ray intensity on CCN is small and unlikely to be comparable to the large variations in natural primary aerosol emissions. (kiwithinker.com)