To obtain the turbulent fluxes the eddy-correlation technique is used. The measuring system is based on a 3D ultrasonic anemometer (Gill Windmaster Pro) in combination with a fast open-path infrared gas analyser (Li-Cor LI-7500) placed on the top of a 2m mast. A full description of the system is given by Moncrieff et al. (1997) and Aubinet et al. (2000).
With a separate datalogger (Campbell CR10X) the following parameters are measured: incoming and reflected short wave radiation, net radiation, reflected PAR, relative humidity, air temperature (3 levels), windspeed (3 levels), CO2 concentation (5 levels), H2O concentration (5 levels), soil moisture, soil temperature and rainfall.
Every day the 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.