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Ozone flux over a Norway spruce forest and correlation with net ecosystem production |
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| Authors: | Zapletal Miloš Cudlín Pavel Chroust Petr Urban Otmar Pokorný Radek Edwards-Jonášová Magda Czerný Radek Janouš Dalibor Taufarová Klára Večeřa Zbyněk Mikuška Pavel Paoletti Elena |
| Institution: | a Ekotoxa s.r.o. - Centre for Environment and Land Assessment, Otická 37, 746 01 Opava, Czech Republic b Silesian University at Opava, Faculty of Philosophy and Science, Masarykova 37, 746 01 Opava, Czech Republic c Institute of Systems Biology and Ecology of the AS CR, v.v.i., Na Sádkách 7, 37005 ?eské Budějovice, Czech Republic d Institute of Systems Biology and Ecology of the AS CR, v.v.i., Po?í?í 3b, 60300 Brno, Czech Republic e Institute of Analytical Chemistry of the AS CR, v.v.i., Veve?í 97,60200 Brno, Czech Republic f Institute of Plant Protection, National Research Council of Italy, via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy |
| Abstract: | Daily ozone deposition flux to a Norway spruce forest in Czech Republic was measured using the gradient method in July and August 2008. Results were in good agreement with a deposition flux model. The mean daily stomatal uptake of ozone was around 47% of total deposition. Average deposition velocity was 0.39 cm s−1 and 0.36 cm s−1 by the gradient method and the deposition model, respectively. Measured and modelled non-stomatal uptake was around 0.2 cm s−1. In addition, net ecosystem production (NEP) was measured by using Eddy Covariance and correlations with O3 concentrations at 15 m a.g.l., total deposition and stomatal uptake were tested. Total deposition and stomatal uptake of ozone significantly decreased NEP, especially by high intensities of solar radiation. |
| Keywords: | Ozone deposition Stomatal conductance Deposition velocity Friction velocity Gradient method Tropospheric ozone Net ecosystem production |
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