Receptor Modeling

Epiphytic Lichens:

Epiphytic Lichens have been used to map the extent of sulphur and nitrogen deposition and spatial patterns. These data will be used to validate deposition patterns as predicted by routine regional dispersion modeling.

Real-World Emissions Characterization:

Real-World Emissions Characterization quantifies emission rates and chemical fingerprints for fixed and mobile sources under actual operating conditions. Measurements have been made for an extensive list of substances emitted from two stacks at an oil sands upgrader.

WBEA has completed the first-ever emission measurements on 400-ton mine heavy haulers under routine operating conditions using specially designed, portable emissions monitoring systems linked with on-board computers.

WBEA has also conducted a regional dust characterization project. Size distribution and chemical fingerprinting for a variety of urban, on-road, off-road, mine and other surfaces in the region was completed in 2013.

Lichen Receptor Modeling Project:

TEEM has completed an integrated, multi-disciplinary receptor modeling project. Lichens collected at 359 sites in the region have been analyzed for 42 trace elements, sulphur and nitrogen, polycyclic aromatic hydrocarbons, and stable isotopes of lead and mercury using state of the art analytical procedures. Five models have been applied to source fingerprints and lichen elemental concentrations. On a regional scale, most of the variability in elemental concentrations measured in an ecosystem receptor (lichens) can be explained. Contributions to lichens have been attributed to regional sources such as oil sands processing, mining, urban transport, forest fires and dust. These results are essential to inform stakeholders and decision makers of the linkage between air emissions and their environmental effects.