Tag Archive for 'Keeling curve'

Scripps tweets daily atmospheric C02 reading as it nears 400 ppm

April 23rd, 2013 by Scripps Institution of Oceanography

For the first time in human history, concentrations of the greenhouse gas carbon dioxide (CO2) could rise above 400 parts per million (ppm) for sustained lengths of time throughout much of the Northern Hemisphere as soon as May 2013. To provide a resource for understanding the implications of rising CO2 levels, Scripps Institution of Oceanography […]