Fig. 5.
a, Relationship between the total intensity of microbial-derived organic matter (MOM; carbohydrate and protein-like compounds) and number concentration of Aitken mode particles (CNAitken; 25–100 nm in diameter). b, Relationship between the total intensity of terrestrial-derived organic matter (TOM; lignin and tannin-like compounds) and number concentration of accumulation mode particles (CNAccum; 100–400 nm in diameter). Unfilled gray circles indicate the cases with high rainfall rates >0.03 mm h−1 (along the air-mass transport pathway), presumably affected by wet deposition. In the regression plots, the solid lines indicate the best fit. c–d, The size-resolved correlation coefficients between particle number concentration (PNC) within the range of 25–400 nm with the intensity of MOM (c) and TOM (d). The shaded areas highlight the particle diameter range strongly correlated with the MOM and TOM intensities.