fig2

Figure 2. (A) Vertical profiles of the concentrations (ng g^-1) of different Polycyclic aromatic hydrocarbons (PAH) congeners and Σ16PAHs in the sediment core collected from Phayao Lake, Thailand; (B) Vertical profiles of the concentrations (ng g^-1) of different PAH congeners and Σ16PAHs in the sediment core collected from Phayao Lake, Thailand.