Fig. 1From: Southern Hemisphere mid- and high-latitudinal AOD, CO, NO2, and HCHO: spatiotemporal patterns revealed by satellite observationsClimatological monthly mean distribution of the MODIS aerosol optical depth (AOD) at 550 nm (dimensionless) at 30–60° S. The color in each pixel reveals the median AOD value for all available measurements from 2005 to 2016Back to article page