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

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 to oc... Mehr ...