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Simultaneous measurements of particle scattering coefficient (B scat ) and absorption coefficient (B abs ) were conducted at Xi'an from mid-August to mid-October 2012 to estimate the particle single scattering albedo (SSA) and the Ångström coefficients in highly polluted urban air. The hourly averaged B scat was 272Mm −1 at 532nm and 82Mm −1 at 870nm, while...
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