Carbon Dioxide Flux Measurement Systems (CO2FLX)
Instrument Categories: Atmospheric Carbon
General Overview
The Southern Great Plains (SGP) carbon dioxide flux (CO2 flux) measurement systems provide half-hour average fluxes of CO2, H2O (latent heat), and sensible heat. The fluxes are obtained by the eddy covariance technique, which computes the flux as the mean product of the vertical wind component with CO2 and H2O densities, or estimated virtual temperature. A three-dimensional sonic anemometer is used to obtain the orthogonal wind components and the virtual (sonic) temperature. An infrared gas analyzer is used to obtain the CO2 and H2O densities. A separate sub-system also collects half-hour average measures of meteorological and soil variables from separate 4-m towers.
Primary Measurements Taken
The following measurements are those considered scientifically relevant. Refer to the netCDF File Header Descriptions (Data Object Design Files) for the list of all available measurements, including those recorded for diagnostic or quality assurance purposes.
- Atmospheric moisture
- Atmospheric pressure
- Atmospheric temperature
- Atmospheric turbulence
- CO2 concentration
- CO2 flux
- Friction velocity
- Horizontal wind
- Longwave broadband downwelling irradiance
- Longwave broadband upwelling irradiance
- Shortwave broadband total downwelling irradiance
- Shortwave broadband total upwelling irradiance
- Latent heat flux
- Precipitation
- Sensible heat flux
- Soil heat flux
- Soil moisture
- Soil moisture flux
- Soil temperature
- Vertical velocity
- Virtual temperature
Available Datastreams
- 30co2flx25m - Eddy Correlation CO2 Flux Data: 25 m samples, 30-min stats
- 30co2flx4m - Eddy Correlation CO2 Flux Data: 4 m samples, 30-min stats
- 30co2flx4mmet - Eddy Correlation CO2 Flux Data: 4 m samples, meteorological data, 30-min stats
- 30co2flx60m - Eddy Correlation CO2 Flux Data: 60 m samples, 30-min avg
Sites / Facilities
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- Southern Great Plains (SGP)
- Central Facility, Lamont, OK (C1)
Mentor(s)
Marc Fischer
(510) 486-5539
mlfischer@lbl.gov
Sebastien Biraud
associate
510-486-6084
scbiraud@lbl.gov