Invasion of the land : mosses, bryophytes and climate change.
by Chris, 12 March, 2012, 3 comments
Throughout the twentieth century, stations like that at Manua Loa have monitored the level of carbon dioxide in the air. It is clear that atmospheric concentrations of carbon dioxide have risen from about from about 300 ppm in the 1960’s to nearly 400 ppm by 2010.
However, if we look back some 480 million years (to the Ordivician Period) the level of carbon dioxide was some sixteen times higher than the present level and the average global temperature was about 25 oC, that is, about 10 oC higher than today’s average. So how and why has global temperature fallen ? Read more...
