Eddy Correlation Flux Measurement System (ECOR) - IOP
Instrument Categories: Surface/Subsurface Properties
General Overview
The eddy correlation (ECOR) flux measurement system provides in situ, half-hour measurements of the surface turbulent fluxes of momentum, sensible heat, latent heat, and carbon dioxide. The fluxes are obtained with the eddy covariance technique, which involves correlation of the vertical wind component with the horizontal wind component, the air temperature, the water vapor density, and the CO2 concentration. Instruments used are
- A fast-response, three-dimensional (3-D) wind sensor (sonic anemometer) to obtain the orthogonal wind components and the speed of sound (SOS) (used to derive the air temperature) and
- An open-path infrared gas analyzer (IRGA) to obtain the water vapor density and the CO2 concentration.
The ECOR systems are deployed at the locations where other methods for surface flux measurements (e.g., energy balance Bowen ratio systems) are difficult to employ, primarily at the north edge of a field of crops. To learn more about the calibration of this instrument, see Calibration of LI-7500 Sensor for the CO2flx and ECOR Systems.
IOPs Where the Instrument was Used
Mixed-Phase Arctic Cloud Experiment
North Slope Alaska, Sep 27-Oct 21 2004
Primary Measurements Taken
The following measurements are those considered scientifically relevant. Refer to the datastream (netcdf) file headers for the list of all available measurements, including those recorded for diagnostic or quality assurance purposes.
Mentor(s)
David Cook
(630) 252-5840
drcook@anl.gov
