Eddy correlation fluxes of momentum, heat, water vapor and CO2 during ASGASEX
conference paper
During ASGASEX, TNO-FEL opertred a micrometeorological flux package consisting of an
ultrasonic anemometer (Solent) and two open path infrared H2O and CO2 concentration fluctuation meters (Advanet,
E0094A). The instruments were mounted upside down on the South side of the pronge at the end of the 21 m boom,
with their sampling volumes 67 cm (Sonic) and 25 cm (Advanet) below the boom; horizontal separation between
the two gas sensors 20 cm and distance to the anemometer 25 cm. The ultrasonic anemometer was tested in a wind
tunnel [Kunz, 1994]. During the experiment, the CO2 channels of the gas sensors were calibrated on a regular
base using N2 and two factory-calibrated gas mixtures with respectively 250 ppm and 450 ppm CO2 (balance
nitrogen). For water vapor, the factory calibration was used,
ultrasonic anemometer (Solent) and two open path infrared H2O and CO2 concentration fluctuation meters (Advanet,
E0094A). The instruments were mounted upside down on the South side of the pronge at the end of the 21 m boom,
with their sampling volumes 67 cm (Sonic) and 25 cm (Advanet) below the boom; horizontal separation between
the two gas sensors 20 cm and distance to the anemometer 25 cm. The ultrasonic anemometer was tested in a wind
tunnel [Kunz, 1994]. During the experiment, the CO2 channels of the gas sensors were calibrated on a regular
base using N2 and two factory-calibrated gas mixtures with respectively 250 ppm and 450 ppm CO2 (balance
nitrogen). For water vapor, the factory calibration was used,
TNO Identifier
94799
Publisher
Koninklijk Nederlands Meteorologisch Instituut
Source title
Report of the ASGASEX '94 workshop, October 3-5, 1994, KNMI, De Bilt, the Netherlands
Editor(s)
Oost, W.A.
Place of publication
De Bilt
Pages
12-16
Files
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