Global Stations CO2 Concentration Trends Graphic | Scripps CO2 Program

Global Stations CO2 Concentration Trends


Black Dots: Monthly average atmospheric carbon dioxide concentration versus time at stations in the Northern and Southern Hemispheres where CO2 concentration is in parts per million in the mole fraction (p.p.m.).

Black Curves: The sum of 4 seasonal harmonics and a spline function to the stations CO2 concentration data. The seasonal harmonics include a linear gain factor, to represent increasing amplitude with time.

Station code names are as follows: PTB = Point Barrow, LJO = La Jolla, MLO = Mauna Loa Observatory, CHR = Christmas Island, SAM = Samoa, and SPO = South Pole.

Data from Scripps CO2 Program.