EDDY COVARIANCE AND BOWEN RATIO ESTIMATES OF WATER VAPOR AND CO_2 FLUXES OVER CRESTED WHEATGRASS

摘要

The two systems have reasonable agreement for water vapor fluxes for each season, especially when EC values adjusted for closure. However, EC fluxes are biased lower. The EC CO_2 fluxes were always larger than those of BR. Adjusting CO_2 fluxes for energy balance closure in an analogous way as water vapor reduced the agreement. Both methods indicate that the crested wheatgrass was a net source of carbon over the season, which was abnormally warm and dry. Clearly we need evaluate further the causes of the discrepancies between these approaches before the two data sets can be easily integrated.