University of Southampton (via Science Daily) (archived copy that may be more readable) reports on work published in Nature Communications (open access; doi:10.1038/ncomms14845). Scientists combined previously published data regarding atmospheric carbon dioxide over the past ~420 million years with an estimate of solar irradiance based on previous work. One of the authors told the University of Southampton:
Our new CO2 compilation appears on average to have gradually declined over time by about 3-4 ppm per million years. This may not sound like much, but it is actually just about enough to cancel out the warming effect caused by the sun brightening through time, so in the long-term it appears the net effect of both was pretty much constant on average.
additional coverage:
Climate Central
related story:
Scott Wagner Explains Climate Change: 'We're Moving Closer to the Sun'
related comment:
Re:Not entirely wrong by Anonymous Coward
(Score: 2) by Runaway1956 on Monday April 10 2017, @06:48AM (2 children)
you need to worry more about the free oxygen content of the atmospher http://news.nationalgeographic.com/news/2011/08/110808-ancient-insects-bugs-giants-oxygen-animals-science/ [nationalgeographic.com]
(Score: 2, Touché) by aristarchus on Monday April 10 2017, @08:20AM
Worried more about the gluten saturation of the zoosphere, or the rising tide of right-wing politics, or the discounting of actual science, learning, and scholarship, and maybe about Bill O'really trying to offer me a "career opportunity". Why worry about giant bugs when you got jmorris?
(Score: 2) by isostatic on Monday April 10 2017, @10:41AM
the free oxygen content
Sounds a bit like a commie plot to me