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AOD (midvisible wavelength) simulations compared with data from 72 AERONET sites from 2009 to 2011. Blue (red) line is fitted line forced thru the origin for rural (urban) sites, 1:1 line is shown in solid black, 1:2 and 2:1 lines are shown in dashed black. Urban sites are denoted by red circles, while rural or remote sites are denoted by blue circles. Error bars denote year‐to‐year variability of observations.
