Fig. 4: Biosphere-atmosphere interaction pathways of greening effects on ozone air pollution.
From: Co-benefit of forestation on ozone air quality and carbon storage in South China

a Schematic of the three interaction pathways: the “canopy” effect, the “deposition” effect, and the “emission” effect described in the text. b Changes in surface MDA8 ozone concentrations over South China averaged for the growing season due to the “canopy” (blue), “deposition” (green), “emission” effect (red), and total greening effects (gray; including “canopy”, “deposition”, and “emission” effects). Box-and-whisker plots show the 10th, 25th, median, 75th, and 90th percentiles of ozone changes over South China. Extreme values (dots outside the 10th and 90th percentiles) and the mean value (star) are also shown.