研究期間：10108~10207;The purpose of this study is to integrating flux measurements, simulations, and parameterizations for investigating land processes. The study site is the Lien-Hua-Chih (LHC) experimental watershed having a natural broadleaf forest with mixed shrubs and ferns in lower canopy. Flux measurements will involve momentum, energy, water, and CO2 fluxes. Simulations will combine integrated hydrometeorological and flux observations for calibrating and validating land process models. Parameterizations will focus on estimating land processes parameters, such as canopy and aerodynamic resistances of the local site. Further studies will deliver parameterization schemes for evapotranspiration and soil respiration. Finally, the net ecosystem exchange of the study site will be estimated. With long measurements, we will be able to investigate seasonal variability of land process fluxes. We have designed an automatic open/close soil respiration and CO2 profile instruments with low costs. Based on previous results of energy and water fluxes measurements with the eddy covariance (EC) technique at the LHC, the energy closure can reach as high as 90% which is internationally recognized as a suitable site for EC measurement. Based on the progresses of NSC supported project for 2011, 2 more years are expected for conducting fundamental research. In year 2011, CO2 flux measurement was added to accomplish complete land process flux observations and develop a flux gap-filling model for estimating long term fluxes. In Year 2012, we will focus on investigating long-term and seasonal flux variability and land process simulations and parameterizations. In year 2013, we will develop parameterization schemes for describing evapotranspiration and soil respiration and build flux databases for promoting international cooperation and domestic researchers.
