Observed Global CO2 Fluxes Graphic | Scripps CO2 Program

Observed Global CO2 Fluxes


Blue Curve: CO2 rate of change based on Mauna Loa Record.

Black Curve: CO2 rate of change based on the Antarctic ice core record from Law Dome before 1958 (Macfarling Meure, C. et al., 2006: Law Dome CO2, CH4 and N2O ice core records extended to 2000 years BP. Geophysical Research Letters, 33.) and a seasonally detrended arithmetic average of monthly air measurements from Mauna Loa and the South Pole from the Scripps CO2 program after and including 1958. The records were combined without adjustment. Ice core data are rejected after 1958 which overlap direct measurements. The ice core data are interpolated to monthly resolution using a spline with a stiffness of 0.8. The curve is smoothed to suppress short-term interannual variability, for example, due to El Nino events.

Red Curve: Fossil fuel CO2 emissions.

Mauna Loa and South Pole data from Scripps CO2 Program.