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. 2020 Dec 26;270:129435. doi: 10.1016/j.chemosphere.2020.129435

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Fig. 6 — Maps of concentration weighted trajectories for the complete sampling period (a)18 Feb-31 July 2020, (b) PL, (c) L1, (d) L2, (e) L3, (f) L4, (g) UN1, and (h) UN2 phases. The values shown in the legend represents the BC mass concentration in μg/m³.