Fig. 3From: Southern Hemisphere mid- and high-latitudinal AOD, CO, NO2, and HCHO: spatiotemporal patterns revealed by satellite observationsClimatological monthly mean distribution of the OMI nitrogen dioxide (NO2) tropospheric column (×1014 molecule cm−2) at 30–60° S. The color in each pixel reveals the median NO2 value for all available measurements from 2005 to 2016Back to article page