Fractionation and current time trends of PCB congeners: Evolvement of distributions 1950-2010 studied using a global atmosphere-ocean general circulation model
| Authors | |
|---|---|
| Year of publication | 2012 |
| Type | Article in Periodical |
| Magazine / Source | Atmospheric Chemistry and Physics |
| MU Faculty or unit | |
| Citation | |
| Web | http://www.atmos-chem-phys-discuss.net/12/11699/2012/ |
| Doi | http://dx.doi.org/10.5194/acp-12-7199-2012 |
| Field | Air pollution and control |
| Keywords | PERSISTENT ORGANIC POLLUTANTS; POLYCHLORINATED BIPHENYL CONGENERS; HISTORICAL EMISSION INVENTORY; AIR PARTITION-COEFFICIENT; LONG-RANGE TRANSPORT; UK BACKGROUND AIR; 3-D DYNAMIC-MODEL; TEMPORAL TRENDS; ORGANOCHLORINE PESTICIDES; LATITUDINAL FRACTIONATION |
| Description | PCBs are ubiquitous environmental pollutants expected to decline in abiotic environmental media in response to decreasing primary emissions since the 1970s. A coupled atmosphere-ocean general circulation model with embedded dynamic sub-models for 5 atmospheric aerosols and the marine biogeochemistry and air-surface exchange processes with soils, vegetation and the cryosphere is used to study the transport and fate of four PCB congeners covering a range of 3–7 chlorine atoms. The results suggest furthermore that the effectiveness of emission control measures may significantly vary among substances: trends of decline in abiotic environmental media do not only vary with latitude (slow in high latitudes), but do also show longitudinal gradients. |
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