Model comparisons for estimating water and heat fluxes of reed wetland ecosystem in Panjin

Model comparisons for estimating water and heat fluxes of reed wetland ecosystem in Panjin were done among Profile gradient method,Bowen ratio energy balance method(BREB) and Eddy covariance method(EC),based on the data from July 1 to July 31,2005 by open-path eddy covariance system(Li-7500,Li-cor Inc,USA) and the micro-climate gradient observation system.The results showed that there was a consistency of the sensible and latent heat fluxes estimating by Profile gradient method,Bowen ratio energy balance method and Eddy covariance method,whereas the Eddy covariance method had an energy imbalance.In July,latent heat fluxes played an important role in reed wetland ecosystem.The daily maximal sensible and latent heat fluxes calculating by BREB were 164.25 W·m~(-2) and 294.18 W·m~(-2),respectively.Energy balance components took on inversUshapes according to their diurnal changes.After rain,the value of water and heat fluxes in reed wetland ecosystem increased and the peak value appeared ahead of time.