CO₂ Concentration at Mauna Loa Observatory, Hawaii

Keeling Curve

Mauna Loa Observatory

For daily updates, see keelingcurve.ucsd.edu

Measurements by the Scripps CO₂ program are supported by the U.S. Department of Energy (DOE) and by Earth Networks, a technology company that is collaborating with Scripps to expand the global GHG monitoring network.