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Sources: a Hoff et al., 1996; b Baker et al., 1997;c Nelson et al., 1998.

Figure 27.8. Atmospheric deposition fluxes (|g m-2 yr-1) of three PAHs measured at Liberty Science Center via gas absorption (striped), wet deposition (black), and dry particle deposition (white).

Phenanthrene Pyrene Benzo[a]pyrene

Figure 27.8. Atmospheric deposition fluxes (|g m-2 yr-1) of three PAHs measured at Liberty Science Center via gas absorption (striped), wet deposition (black), and dry particle deposition (white).

absorptive input of gaseous PAHs dominates the atmospheric signal for the more volatile phenan-threne but plays no significant role for the mostly particle-bound BaP. The elevated atmospheric deposition of PAHs to the New York/New Jersey Harbor Estuary is consistent with the proximity of higher local and regional emissions in the estuary and near the monitoring stations.

Figure 27.8 depicts the atmospheric deposition of phenanthrene, pyrene, and BaP at Liberty Science Center. Whereas the deposition of phenanthrene (which exists largely in the gas phase) is overwhelmingly dominated by gas absorption, dry particle deposition and precipitation inputs dominate for BaP, which exists primarily in the particle phase in the atmosphere. Phenanthrene deposition is more or less uniform over the seasons, whereas BaP is dominated by higher deposition in the winter months due to higher particulate emissions.

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