Validation of meteorological and ground-level ozone WRF-CHIMERE simulations in a mountainous grapevine growing area for phytotoxic risk assessment

Ozone is the most damaging phytotoxic air pollutant to crop yield quantity and quality. This study presents validation of a simulation with WRF-CHIMERE modelling system in order assess risk phytotoxicity by tropospheric ozone for an important characteristic Mediterranean crop, i.e. grapevine. The region was Douro wine Portugal, which characterized rugged relief climate. covered reference grapevine growing season Northern Hemisphere (from April September 2017), during particular measuring campaign also carried out. meteorological simulations on daily hourly time resolution performed based data from three weather stations, namely temperature, global solar radiation, relative humidity, wind speed direction values. assessed two stations. A specific growth parameter monitored phenological observations introduced stomatal uptake assessment. Concerning meteorology, statistics were acceptable within range what has been found other regional climate simulations. Ground-level ozone-based values calculated better assessment risk, cumulative standards vegetation protection. Stomatal flux estimates those measured local cultivars field when there not severe water stress limitation. Both statistically adjusted model indicate that considerable areas Demarcated Region Portugal can exceed critical exposure according current European legislation standards. Moreover, simulated results impact quality target because exposure- flux-based indices criteria open-top-chamber experimental knowledge.