Comparison of different stomatal conductance algorithms for ozone flux modelling

• Published in: Environmental pollution (1987) 2007-04, Vol.146 (3), p.726-735
• Main Authors: Büker, P., Emberson, L.D., Ashmore, M.R., Cambridge, H.M., Jacobs, C.M.J., Massman, W.J., Müller, J., Nikolov, N., Novak, K., Oksanen, E., Schaub, M., de la Torre, D.
• Format: Article
• Language: English
• Subjects: Algorithms; Animal, plant and microbial ecology; Applied ecology; assimilation; atmosphere; Betula - drug effects; Betula - physiology; Betula pendula; Biological and medical sciences; c-3 plants; carbon-dioxide; Circadian Rhythm; co2; Crops, Agricultural - drug effects; Crops, Agricultural - physiology; ecosystems; Ecotoxicology, biological effects of pollution; Environmental Exposure - adverse effects; Environmental Monitoring - methods; Fagus - drug effects; Fagus - physiology; Fagus sylvatica; Fundamental and applied biological sciences. Psychology; gas exchange; grapes; h2o gas-exchange; mathematical models; Modelling; Models, Biological; Oxidants, Photochemical - toxicity; ozone; Ozone - toxicity; Parameterisation; Photosynthesis; photosynthesis model; Plant Leaves - drug effects; Plant Leaves - physiology; Seasons; Stomatal conductance; Terrestrial environment, soil, air; Triticum - drug effects; Triticum - physiology; Triticum aestivum; Triticum turgidum subsp. durum; vegetation; Vitaceae; Vitis - drug effects; Vitis - physiology; Vitis vinifera; water
• ISSN: 0269-7491; 1873-6424
• DOI: 10.1016/j.envpol.2006.04.007

A multiplicative and a semi-mechanistic, BWB-type [Ball, J.T., Woodrow, I.E., Berry, J.A., 1987. A model predicting stomatal conductance and its contribution to the control of photosynthesis under different environmental conditions. In: Biggens, J. (Ed.), Progress in Photosynthesis Research, vol. IV. Martinus Nijhoff, Dordrecht, pp. 221–224.] algorithm for calculating stomatal conductance ( g s) at the leaf level have been parameterised for two crop and two tree species to test their use in regional scale ozone deposition modelling. The algorithms were tested against measured, site-specific data for durum wheat, grapevine, beech and birch of different European provenances. A direct comparison of both algorithms showed a similar performance in predicting hourly means and daily time-courses of g s, whereas the multiplicative algorithm outperformed the BWB-type algorithm in modelling seasonal time-courses due to the inclusion of a phenology function. The re-parameterisation of the algorithms for local conditions in order to validate ozone deposition modelling on a European scale reveals the higher input requirements of the BWB-type algorithm as compared to the multiplicative algorithm because of the need of the former to model net photosynthesis ( A n). A comparison of an empirical and a semi-mechanistic stomatal conductance algorithm for European crop and forest species reveals a similar predictive capability.