Spatial and Temporal Variability of Polycyclic Aromatic Hydrocarbons in Sediments from Yellow River-Dominated Margin

Figure 7

Historical profiles of diagnostic ratios of PAHs in sediment core from southern Bohai Sea, China. IcdP: indeno[1,2,3-cd]pyrene; Bpe: benzo[g,h,i]perylene; Fla: fluoranthene; Pyr: pyrene; BaA: benz[a]anthracene; Chr: chrysene; MP: methyl phenanthrenes; P: phenanthrenes. The dash lines represent the thresholds for different sources [1].