by applying the WPL correction to avoid density fluctuation.After this correction ,reliable LE and H together with CO2 exchange were obtained from the measured EC data as half-hourly averages from instantaneous data
The other two components of the energy balance ,Rn and Gp,were measured with a net radiometer at 1.5 m above surface,and two soil heat flux plates buried about 5 cm below the soilcsurface,respectively.The Gp value was obtained by averaging measuremts of both plates,one bur