Instrument : 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.
Output 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
Primary Measurements
The following measurements are those considered scientifically relevant.
- Atmospheric moisture
- Atmospheric pressure
- Atmospheric temperature
- Atmospheric turbulence
- CO2 concentration
- CO2 flux
- Friction velocity
- Horizontal wind
- Latent heat flux
- Longwave broadband downwelling irradiance
- Longwave broadband upwelling irradiance
- Precipitation
- Sensible heat flux
- Shortwave broadband total downwelling irradiance
- Shortwave broadband total net irradiance
- Shortwave broadband total upwelling irradiance
- Soil heat flux
- Soil moisture flux
- Soil surface temperature
- Virtual temperature
Locations
- Southern Great Plains (SGP)
- Central Facility, Lamont, OK (C1)
Contact(s)
Marc Fischer
(510) 486-5539
mlfischer@lbl.gov
Sebastien Biraud
associate
510-486-6084
SCBiraud@lbl.gov
