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(A, C, E, G) Normalized high-resolution aerosol mass spectra (colored by the ion type) and elemental ratios of the PMF factors. (B, D, F, H) Time series of the PMF factors and tracer compounds, along with their correlation coefficient. (I) Diurnal trends of PMF factors with (solid line) and without (dash line) multiplying by boundary layer height (BLH).
