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Environmental controls on ozone fluxes in a poplar plantation in Western Europe

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Abstract

Tropospheric O-3 is a strong oxidant that may affect vegetation and human health. Here we report on the O-3 fluxes from a poplar plantation in Belgium during one year. Surprisingly, the winter and autumn O-3 fluxes were of similar magnitude to ones observed during most of the peak vegetation development. Largest O-3 uptakes were recorded at the beginning of the growing season in correspondence to a minimum stomatal uptake. Wind speed was the most important control and explained 44% of the variability in the nighttime O-3 fluxes, suggesting that turbulent mixing and the mechanical destruction of O-3 played a substantial role in the O-3 fluxes. The stomatal O-3 uptake accounted for a seasonal average of 59% of the total O-3 uptake. Multiple regression and partial correlation analyses showed that net ecosystem exchange was not affected by the stomatal O-3 uptake. (C) 2013 The Authors. Published by Elsevier Ltd. All rights reserved.

Agriculture Air Pollutants Air Pollution Belgium Ecosystem Environmental Monitoring Forestry Humans Ozone Populus Seasons Wind 66H7ZZK23N Ozone ENVIRONMENTAL LEAF GAS-EXCHANGE SURFACE OZONE POPULUS-TREMULOIDES EDDY-CORRELATION FOLIAR INJURY AMBIENT OZONE WATER-VAPOR LONG-TERM OXIDATION-PRODUCTS TROPOSPHERIC OZONE Eddy covariance AOT40 Stomatal O-3 uptake Deposition velocity Western Europe Palearctic region autumn season winter season Dicotyledones Angiospermae Spermatophyta Plantae (Angiosperms Dicots Plants Spermatophytes Vascular Plants) - Salicaceae [26695] poplar common plantation crop ozone 10028-15-6 pollutant 10060 Biochemistry studies - General 37015 Public health - Air water and soil pollution 53004 Horticulture - Tropical subtropical fruits and plantation crops 53012 Horticulture - Miscellaneous and mixed crops 54512 Phytopathology - Nonparasitic diseases Horticulture Pollution Assessment Control and Management Stomatal O3 uptake Correlation methods Vegetation Environmental engineering ozone biological uptake deposition velocity eddy covariance growing season multiple regression net ecosystem exchange plantation seasonal variation stomatal conductance troposphere wind velocity air pollution article atmospheric deposition autumn controlled study ecosystem nonhuman ozone layer plant development wind wind speed winter Western Europe Deposition velocities Environmental control Mechanical destruction Multiple regressions Net ecosystem exchange Stomatal O3 uptake