Characteristics of Heat, Water Vapor, and CO2 Fluxes above a Mountainous Cypress Forest in Taiwan

Results from 2-year measurements of sensible heat, water vapor, and CO2 fluxes above a homogeneous mountainous Cypress forest are presented. The site is located at 1650 m a.s.l. in northeastern Taiwan, close to a nature preserve. Vertical turbulent scalar fluxes are obtained by eddy- covariance method. The data were collected during the period from April 2005 to May 2007. Two gap filling strategies, including linear and nonlinear regressions between net radiation and scalar fluxes, were discussed and applied for filling the missing and rejected data. We examined the seasonal patterns of net radiation, sensible heat, latent heat, and CO2 fluxes. The results showed that all three fluxes change seasonally, in consist with net radiation. Bowen ration variation with season and relative transport efficiencies between heat and water vapor and carbon dioxide under different atmospheric stabilities were also discussed.