A long-term observation of CO2 exchange was
conducted above a broadleaved deciduous forest in Sapporo,
northern Japan.
The CO2 exchange was measured using the eddy covariance method with
closed-path gas analyzer and we obtained net ecosystem production (NEP). We estimated a carbon budget using a simple
empirical model. In this model, ecosystem respiration (RE) and gross primary
production (GPP) were parameterized by soil temperature and photosynthetically
active radiation (PAR)
respectively. The annual NEP
derived from an equation “NEP = GPP
-RE” ranged from 237 to 431 g C m-2
year-1 for 4 years (2000 - 2003).
Author: K. Kitamura, Y. Nakai, S. Suzuki, K. Yamanoi, et al (kitamu93 at ffpri dot affrc dot go dot jp)
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