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Guelph Aerosol and Visibility Monitoring

Guelph Scanning Proton Microprobe (GSPM) laboratory ran three monitoring sites in Canada. The objective was to measure the following characteristics of the fine atmospheric aerosol:

Sampling and analytical protocols are compatible with the Interagency Monitoring of Protected Visual Environments (IMPROVE) program, sampling schedule followed the IADN/NAPS 1-in-6 days protocol. The aerosol samples were analyzed by a suite of analytical techniques: gravimetric analysis, Laser Integrating Plate Method (LIPM), Proton Elastic Scattering Analysis (PESA), and Proton Induced X-ray Emission (PIXE). The final elemental air concentrations are subjected to multivariate statistical analysis and wind back-trajectory modelling.

The Guelph PIXE Group maintains data archives of regular monitoring results, Egbert98 study, etc for registered users.

Financial support for this project was provided by Environment Canada and Natural Sciences and Engineering Research Council of Canada.


The Interagency Monitoring of Protected Visual Environments (IMPROVE) program is run by the Air Quality Group, Crocker Nuclear Laboratory, University of California, Davis, California. The original IMPROVE sampler consists of four modules with the following analytical measurements:

  1. Module A .. fine .. mass, light absorption, elemental composition (H, Na-Pb)
  2. Module B .. fine .. nitrate
  3. Module C .. fine .. organic and elemental carbon
  4. Module D .. PM10 .. mass

Visibility and fine particulate program of the Guelph Scanning Proton Microprobe laboratory is focussed on the Module A studies only.

For more information, please, see: