Figure 9 : Average diurnal MeOH and AA concentrations and AA/MeOH ratios together with air temperature during the growing season above (a ) a mixed forest in Alabama, USA (Suet al., 2016) and (b ) a citrus grove in California, USA (Parket al., 2013) during the growing season. Average diurnal MeOH (blue) and AA (green) ambient concentrations with air temperature together with AA/MeOH concentration ratios are plotted.