New critical levels for ozone effects on young trees based on AOT40 and simulated cumulative leaf uptake of ozone. - Karlsson,P..E..; Uddling,J..; Braun,S..; Broadmeadow,M..; Elvira,S..; Gimeno,B..S..; Le Thiec,D..; Oksanen,E..; Vandermeiren,K..; Wilkinson,M..; Emberson,L.. (Atmospheric Environment, 2004)