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The influence of climate change on stomatal ozone flux to a mountain Norway spruce forest

Zapletal, Miloš, Pretel, Jan, Chroust, Petr, Cudlín, Pavel, Edwards-Jonášová, Magda, Urban, Otmar, Pokorný, Radek, Czerný, Radek, Hůnová, Iva
Environmental pollution 2012 v.169 pp. 267-273
Picea abies, climate change, climatic factors, forests, growing season, meteorological data, models, ozone, phytotoxicity, solar radiation, stomatal movement, troposphere, Czech Republic
Daily stomatal ozone flux to a mountain Norway spruce forest stand at the Bily Kriz experimental site in the Beskydy Mts. (Czech Republic) was modelled using a multiplicative model during the 2009 growing season. The multiplicative model was run with meteorological data for the growing season 2009 and ALADIN-CLIMATE/CZ model data for the 2030 growing season. The exceedance of the flux-based critical level of O₃ (Phytotoxic Ozone Dose) might be lower for Norway spruce at the Bily Kriz experimental site in a future climate (around 2030), due to increased stomatal closure induced by climate change, even when taking into account increased tropospheric background O₃ concentration. In contrast, exceedance of the concentration-based critical level (AOT40) of O₃ will increase with the projected increase in background O₃ concentration. Ozone concentration and stomatal flux of ozone significantly decreased NEP under both present and future climatic conditions, especially under high intensities of solar radiation.