In a temperate deciduous forest in Japan
situated complex terrain, net ecosystem CO2 exchange (NEE) was
estimated using micro-meteorological method, and net ecosystem products (NEP)
was estimated by measures of major carbon pools and fluxes using biometric and
chamber methods. In this study we evaluate the threshold value of u* for
interpolation in case stability was high using estimated NEP acquired by biometric
method. And the function which relate temperature to FCO2 for
interpolation was evaluated by the data acquired using automated chamber for
soil, CWD, trunk and foliage CO2 exchanges. Averaged net uptake of
CO2 measured by eddy covariance method from 1999 to 2002 was 3.4 tC
yr-1 ha-1 without compensation of nighttime underreport.
Increase of live under and above ground biomass from 1994 to 1999 was 1.56 tC
yr-1 ha-1. U* threshold values based on biometric and
chamber NEP were respectively 0.28 and 0.35 m sec-1
Author: Y. Kominami, T. Miyama, K. Tamai, Y. Goto, et al (kominy at ffpri dot affrc dot go dot jp)
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