1. Probing the Properties of Particulate Pollution Greg Evans, University of Toronto

2. Data Analysis Techniques
LAMS
Particles
Particle
Types
ART
Seasonal
Trends
Diurnal
Source
Identification
Apportionment
Geographic
PMF
PSCF

3. Episodes from Long Range Sources
300
Average Hit Rate
(Hits/Hour)
Jan 2002
Feb 2002
Mar 2002
Apr 2002
May 2002
Jun 2002
Jul 2002
Aug 2002
Sep 2002
Oct 2002
Nov 2002
Dec 2002
Jan 2003
Feb 2003
200
Average Hit Rate
(Hits/Hour)
Jan 2002
Feb 2002
Mar 2002
Apr 2002
May 2002
Jun 2002
Jul 2002
Aug 2002
Sep 2002
Oct 2002
Nov 2002
Dec 2002
Jan 2003
Feb 2003
Sand storm
Forrest fires

4. Temporal Trends Road Salt
Jan 2002
Feb 2002
Mar 2002
Apr 2002
May 2002
Jun 2002
Jul 2002
Aug 2002
Sep 2002
Oct 2002
Nov 2002
Dec 2002
Jan 2003
Feb 2003
100
Average Hit Rate (Hits/Hour) 3 1
0: : : : :00

5. Temporal Trends Organic Nitrate70
Jan 2002
Feb 2002
Mar 2002
Apr 2002
May 2002
Jun 2002
Jul 2002
Aug 2002
Sep 2002
Oct 2002
Nov 2002
Dec 2002
Jan 2003
Feb 2003
Average Hit Rate (Hits/Hour) 5 4
0: : : : :00

6. Nitrate Episodes Particle types5 14
Hit Rate (hits/hour)
Particle Type
Mass Concentration (mg/m3)
PM2.5 Nitrate
3/11/02 17:00
3/13/02 4:00

7. Applications Regulations: Health Impact: Environmental Impact:
source identification/apportionment
temporal and spatial variations
speciation based PM2.5 limits
Health Impact:
time series for epidemiology
identification of physiologically important components
Environmental Impact:
chemical transformation (lab and/or field based)
gas-particle interactions
role of PM in climate change
transport and deposition of metals
PM reduction:
Study of emission sources (e.g. combustion chemistry, cars)
Model evaluation/validation,
Rapid analysis during an emergency