Ozone deposition to a coniferous and deciduous forest in the Czech Republic

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Abstract

Estimates of ozone concentration and deposition flux to coniferous and deciduous forest in the Czech Republic on a 1 × 1 km grid during growing season (April-September) of the year 2001 are presented. Ozone deposition flux was derived from ozone concentrations in the atmosphere and from its deposition velocities. To quantify the spatial pattern in surface concentrations at 1 km resolution incorporating topography, empirical methods are used. The procedure maps ozone concentrations from the period of the day when measurements are representative for the forest areas of countryside. The effects of boundary layer stability are quantified using the observed relationship between the diurnal variability of surface ozone concentration and altitude. Ozone deposition velocities were calculated according to a multiple resistance model incorporating aerodynamic resistance (R a), laminar layer resistance (R b) and surface resistance (R c). Surface resistance (R c) comprises stomatal resistance (R sto). R sto was calculated with respect to global radiation, surface air temperature and land cover. Modelled total and stomatal ozone fluxes are compared with the maps describing equivalent values of AOT40 (accumulated exposure over threshold of 40 ppb). for forests, the critical level (9,000 ppbh May-July daylight hours) is exceeded over 50% of forested territory. © 2007 Springer Science+Business Media B.V.

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Zapletal, M., & Chroust, P. (2007). Ozone deposition to a coniferous and deciduous forest in the Czech Republic. In Acid Rain - Deposition to Recovery (pp. 187–200). Springer Netherlands. https://doi.org/10.1007/978-1-4020-5885-1_21

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