To obtain the turbulent fluxes the eddy-correlation technique is used. The measuring system is based on a 3D ultrasonic anemometer (Gill R3-50) in combination with a fast open-path infrared gas analyser (Li-Cor LI-7500) and a Li-Cor LI-7700 placed on the top of a 3 m mast. A full description of the system is given by Moncrieff et al. (1997) and Aubinet et al. (2000).
All data are stored using a Campbell CR1000 with storage module at 5 Hz.
Every day the half-hourly diagnostic data stored on the datalogger are collected and graphs are created automatically. These graphs can be found on this web-site.
Aubinet M., Grelle A., Ibrom A., Rannik �., Moncrieff J., Foken T., Kowalski A.S., Martin P.H., Berbigier P., Bernhofer Ch., Clement R., Elbers J.A., Granier A., Gr�nwald T., Morgenstern K., Pilegaard K., Rebmann C. , Snijders W., Valentini R., Vesala T. Estimates of the Annual Net Carbon and Water Exchange of Forests: the EUROFLUX Methodology. Adv. Ecol. Research, 30 (2000), 113-175.
Moncrieff, J.B., J.A. Elbers, & others, 1997. A system to measure surface fluxes of momentum, sensible heat, water vapour and carbon dioxide. Journal of Hydrology 188-189/89-611, special issue on HAPEX-Sahel, 1997, Elsevier Science.