Paper finds solar activity at end of 20th century was highest in 9,400 years: ‘Published in Proceedings of National Academy of Sciences
Study 'examines ice core and tree ring radionuclides and finds solar activity at the end of the 20th century was at the highest levels of the record spanning the past 9,400 years. The paper adds to several others demonstrating that an increase in solar activity and concomitant decrease in cloudiness during the latter 20th century are more than sufficient to explain observed global warming'
