Carbon dioxide measurements

Carbon dioxde was measured using a Non-dispersive Infrared Radiometer (NDIR), Li-COR model 7000 until September 2013. Since then CO2 is instead measured with a Picarro G2401 in cooperation with the Norwegian Institute for Air Research (NILU).

In addition flask samples are taken weekly and analyzed for CO₂, CH₄, CO, and 13CO₂, H₂, N₂O, SF₆ and ¹⁸O in CO₂ by NOAA/CMDL, Boulder, Colorado, USA (Don Neff).
For more info on this program, please visit the CCGG home page.