Exploring the Role of Shelf Sediments in the Arctic Ocean in Determining the Arctic Contamination Potential of Neutral Organic Contaminants
Cited 0 times inCited 3 times in
- Exploring the Role of Shelf Sediments in the Arctic Ocean in Determining the Arctic Contamination Potential of Neutral Organic Contaminants
- Armitage, James M.; Choi, Sung-Deuk; Meyer, Torsten; Brown, Trevor N.; Wania, Frank
- Air-water; Arctic contamination potentials; Arctic ocean; Emission scenario; Hydrophobic organic chemicals; Long term simulation; Organic contaminant; Partition coefficient; Pelagic food web; Polychlorinated biphenyl congener; Primary emissions; Shelf sediment; Surface ocean; Total mass
- Issue Date
- AMER CHEMICAL SOC
- ENVIRONMENTAL SCIENCE & TECHNOLOGY, v.47, no.2, pp.923 - 931
- The main objective of this study was to model the contribution of shelf sediments in the Arctic Ocean to the total mass of neutral organic contaminants accumulated in the Arctic environment using a standardized emission scenario for sets of hypothetical chemicals and realistic emission estimates (1930-2100) for polychlorinated biphenyl congener 153 (PCB-153). Shelf sediments in the Arctic Ocean are shown to be important reservoirs for neutral organic chemicals across a wide range of partitioning properties, increasing the total mass in the surface compartments of the Arctic environment by up to 3.5-fold compared to simulations excluding this compartment. The relative change in total mass for hydrophobic organic chemicals with log air water partition coefficients >= 0 was greater than for chemicals with properties similar to typical POPs. The long-term simulation of PCB-153 generated modeled concentrations in shelf sediments in reasonable agreement with available monitoring data and illustrate that the relative importance of shelf sediments in the Arctic Ocean for influencing surface ocean concentrations (and therefore exposure via the pelagic food web) is most pronounced once primary emissions are exhausted and secondary sources dominate. Additional monitoring and modeling work to better characterize the role of shelf sediments for contaminant fate is recommended.
- ; Go to Link
Appears in Collections:
- UEE_Journal Papers
can give you direct access to the published full text of this article. (UNISTARs only)
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.