Book chapter
The effects of air temperature, wind direction and the Chicago urban plume on spatial and temporal variability of gas-phase PCB congeners
IAGLR '99. International Association for Great Lakes Research: Great Lakes, Great Science, Great Cities. Program and Abstracts, pp.A-39
01/01/1999
Abstract
A predictive model for gas-PCBs over Lake Michigan has been constructed. Using air temperature, wind direction and a shoreline atmospheric PCB concentration dataset, the model predicts the concentration of PCB congeners ( similar to 100) over the lake. The model was parameterized for Lake Michigan with the Lake Michigan Mass Balance Project eight shoreline atmospheric sampling station datasets. The model shows that gas-phase PCB concentrations over Lake Michigan vary considerably as a function of temperature, wind direction, and distance from the urban-industrial region of southwest Lake Michigan. Whole lake mean PCB ranged from 0.125 ng/m3 in February to 1.5 ng/m3 in August. The combined effects of southerly winds and high temperatures cause a large summertime 'plume' of gas-phase PCBs from Chicago. Predicted PCBs concentrations averaged in concentric areas from Chicago range from 4.85 ng/m3 within 10 km of the southwest shore, falling to 1.5 ng/m3 in the 30-40 km area away from shore. The Chicago urban effect shows about a factor of three reduction in concentrations between the southwest shoreline and 30-40 km into the open lake. This factor is larger for congeners that are more enriched in Chicago (higher molecular weight congeners) and less for congeners that delivered to the region by long range atmospheric transport (lower molecular weight congeners).
Details
- Title: Subtitle
- The effects of air temperature, wind direction and the Chicago urban plume on spatial and temporal variability of gas-phase PCB congeners
- Creators
- M L GreenK C HornbuckleJ V Depinto
- Resource Type
- Book chapter
- Publication Details
- IAGLR '99. International Association for Great Lakes Research: Great Lakes, Great Science, Great Cities. Program and Abstracts, pp.A-39
- Language
- English
- Date published
- 01/01/1999
- Academic Unit
- Occupational and Environmental Health; Civil and Environmental Engineering
- Record Identifier
- 9983997973902771
Metrics
18 Record Views