Figure 4.

Adjusted mean FUMO concentration according to mean monthly temperatures in July and October. The mean monthly temperature for July is shown on the x-axis (COOL-TO-NORMAL, HOT). The adjusted mean FUMO concentration obtained by applying the mixed linear model (lmer(FUMO ~ July monthly temperature*October monthly temperature + (1|Year)) to a database of 738 observations is shown on the y-axis. Green bars correspond to observations for cool-to-normal temperature Octobers, whereas yellow bars correspond to data for hot Octobers. Different letters (a, b and c) above the bars indicate significant differences at p-value < 0.05 in Tukey’s multiple comparison test.