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. 2016 Dec 22;4:e2827. doi: 10.7717/peerj.2827

Figure 2. Particle concentrations by wind direction.

Figure 2

Mean fine and coarse aerosol particle concentrations for all sampling events. X-axis denotes the wind direction during sampling offshore (wind coming over land from the southeast) and onshore (wind coming over water from the northeast). Aerosol particles are characterized as coarse (>1.0 um in diameter) or fine (<1.0 um in diameter).