Environmental Science and Pollution Research

, Volume 19, Issue 6, pp 1971–1980

Long-term trends of continental-scale PCB patterns studied using a global atmosphere–ocean general circulation model

POPs Workshop, ten years after the signature of the Stockholm convention

DOI: 10.1007/s11356-012-0943-8

Cite this article as:
Stemmler, I. & Lammel, G. Environ Sci Pollut Res (2012) 19: 1971. doi:10.1007/s11356-012-0943-8

Abstract

Continental-scale distribution and inter-continental transport of four polychlorinated biphenyl (PCB) congeners (28, 101, 153, 180) from 1950 to 2010 were studied using the global multicompartment chemistry transport model MPI-MCTM. Following identical primary emissions for all PCB congeners into air, most of the burden is stored in terrestrial (soil and vegetation) compartments. Thereby, PCB-28, PCB-101 and PCB-153 show a shift of the soil burden maxima from source to remote regions. This shift is downwind with regard to the westerlies for Eurasia and upwind for North America and more prominent for the lighter PCBs than for PCB-153 or PCB-180. In meridional direction, all congeners’ distributions underwent a northward migration in Eurasia and North America since the 1950s. Inter-continental transport from Eurasian sources accounts largely for contamination of Alaska and British Columbia and determines the migration of the PCB distribution in soil in North America. Trans-Pacific transport occurs mainly in the gas phase in boreal winter (December–January–February) at 3–4 km altitude and is on a multi-year time scale strongly linked to the atmospheric pressure systems over the Pacific. Inter-continental transport of the lighter, more volatile PCBs is more efficient than for the heavier PCBs.

Keywords

Polychlorinated biphenyls Trans-Pacific transport Long-range transport Inter-continental transport Persistent organic pollutants Modelling 

Supplementary material

11356_2012_943_MOESM1_ESM.doc (4.3 mb)
ESM 1(DOC 4442 kb)

Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.Max Planck Institute for ChemistryMainzGermany
  2. 2.Research Centre for Toxic Compounds in the EnvironmentMasaryk UniversityBrnoCzech Republic