No impact of tropospheric ozone on the gross primary productivity of a Belgian pine forest

Abstract: High stomatal ozone (O-3) uptake has been shown to negatively affect crop yields and the growth of tree seedlings. However little is known about the effect of O-3 on the carbon uptake by mature forest trees. This study investigated the effect of high O-3 events on gross primary productivity (GPP) for a Scots pine stand near Antwerp Belgium over the period 1998-2013. Stomatal O-3 fluxes were modelled using in situ O-3 mixing ratio measurements and a multiplicative stomatal model which was parameterised and validated for this Scots pine stand. Ozone-induced GPP reduction is most likely... Mehr ...