Atmospheric Radiation Measurement Climate Research Facility US Department of Energy

co2flx > Carbon Dioxide Flux Measurement SystemsInstrument Type(s) > Baseline • Guest

The Southern Great Plains (SGP) carbon dioxide flux (CO2FLUX) measurement systems provide half-hour average fluxes of CO2, H2O (latent heat), sensible heat, and momentum. The systems use the eddy covariance technique, which computes the fluxes from the vertical wind speed in combination with the concentrations of CO2 and H2O, temperature, and horizontal wind speed, respectively. A 3D sonic anemometer obtains the wind components and the temperature, while an infrared gas analyzer measures CO2 and H2O.

A sub-system also measures half-hour averages of radiation, meteorological, and soil measurements.


  • Fixed
  • AMF1
  • AMF2
  • AMF3

Active Locations

Facility Name Start Date
Central Facility, Lamont, OK 2001-01-01


Gibbs JA and E Fedorovich. 2016. "Sensitivity of turbulence statistics in the lower portion of a numerically simulated stable boundary layer to parameters of the Deardorff subgrid turbulence model." Quarterly Journal of the Royal Meteorological Society, 142(698), 10.1002/qj.2818.


Feldman DR, WD Collins, PJ Gero, MS Torn, EJ Mlawer, and TR Shippert. 2015. "Observational determination of surface radiative forcing by CO2 from 2000 to 2010." Nature, 519(7543), 10.1038/nature14240.


Chandra AS, P Kollias, SE Giangrande, and SA Klein. 2010. "Long-Term Observations of the Convective Boundary Layer Using Insect Radar Returns at the SGP ARM Climate Research Facility." Journal of Climate, 23(21), 21, 10.1175/2010jcli3395.1.
Research Highlight

Xiao J and A et. 2010. "A continuous measure of gross primary production for the conterminous United States derived from MODIS and AmeriFlux data." Remote Sensing of Environment, 114(3), 10.1016/j.rse.2009.10.013.


Riley WJ, SC Biraud, MS Torn, ML Fischer, JA Berry, and D Billesbach. 2009. "Regional CO2 and latent heat surface fluxes in the Southern Great Plains: measurements, modeling, and scaling." Journal of Geophysical Research, 114(G4), ISI:000270190300014, 10.1029/2009jg001003.

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