Keeling Curve Website Wants You To Know When CO2 Levels Hit 400 Parts Per Million

On Monday, Hawaii’s Mauna Loa Observatory measured CO2 levels in the air of 398.36 parts per million (ppm).

And that means carbon dioxide, the main gas driving climate change, will soon hit 400 ppm for the first time in human existence.

The world’s longest unbroken record of atmospheric CO2 levels is the “Keeling Curve” measured at Mauna Loa since 1958. The curve was initiated by Charles David Keeling and is maintained by his son, Ralph F. Keeling, at the Scripps Institution of Oceanography (where I did my Ph.D. research on the physical oceanography of the Greenland Sea).

The Scripps folks want you to know precisely when we hit 400 ppm so they have set up a website and even a twitter feed, @Keeling_curve, that will tweet out the CO2 level every day.

Read full text at Think Progress