Tuula Aalto 
,
Pertti Hari,
Timo Vesala
Comparison of an optimal stomatal regulation model and a biochemical model in explaining CO2 exchange in field conditions
Aalto T., Hari P., Vesala T. (2002). Comparison of an optimal stomatal regulation model and a biochemical model in explaining CO2 exchange in field conditions. Silva Fennica vol. 36 no. 3 article id 529. https://doi.org/10.14214/sf.529
Abstract
Gas exchange of Pinus sylvestris L. was studied in subarctic field conditions. Aspects on optimal control of the gas exchange were examined using approach by Hari et al. (Tree Phys. 2: 169–175, 1986). Biochemical model by Farquhar et al. (Planta 149: 78–90, 1980) was utilized to describe the photosynthetic production rate of needles. The model parameters were determined from field measurements. The results from the optimization approach and biochemical model were compared and their performance was found quite similar in terms of R2 calculated using measured exchange rates (0.89 for optimization model and 0.85 for biochemical model). Minor differences were found in relation to responses to intercellular carbon dioxide concentration and temperature.
Keywords
photosynthesis;
Scots pine;
optimization;
Pinus sylvestris L.;
CO2 exchange;
biochemical model
-
Aalto,
Finnish Meteorological Institute, Air Quality Research, Sahaajankatu 20 E, FIN-00810 Helsinki, Finland
E-mail
tuula.aalto@fmi.fi
- Hari, University of Helsinki, Dept. of Forest Ecology, P.O. Box 27, FIN-00014 University of Helsinki, Finland E-mail ph@nn.fi
- Vesala, University of Helsinki, Dept. of Physics, P.O. Box 64, FIN-00014 University of Helsinki, Finland E-mail tv@nn.fi
Received 3 October 2000 Accepted 3 April 2002 Published 31 December 2002
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