Measurements and Instruments

Various instruments and methodologies are used to conduct the aerosol measurements:

• Aerosol Light Absorption 
• Aerosol Light Scattering 
• Aerosol Size Distribution 
• Aerosol Chemistry 

The following table provides a summary of all aerosol measurements and instruments at the four Canadian sites.

Aerosol samples for chemical analyses are collected onto various filter matrices.

Site & Size-cut	Light Absorption	Light Scattering	EC/OC Conc. & isotope	Inorganics and Metal Speciation	Particle # & size
Alert 1 & 10 µm	1-w PSAP 3-w PSAP	TSI 3-w Nephelometer (with backsplatter)	Quartz filter-pack *14-days integrated	high-volume sampler- Whatman 41D *seven days integrated; TSP	CPC-3010 DMA
BERMS 2.5 µm 1.0 µm (Sept. 2009)	1-w PSAP	Ecotech 1-w Nephelometer 2005-Aug 2008 TSI 3-w Nephelometer from Sept 2008	Quartz filter-pack *seven days integrated	Quartz filter-pack – *seven days integrated	None
Whistler 2.5 µm	1-w PSAP	Alquihst- 3-w Nephelometer (no backscatter), 2005-March 2008 TSI 3-w Nephelometer from March 2008	Quartz filter-pack *seven days integrated *seven days integrated day & night separated	Teflon filter-pack *2 days integrated- day & night separate	UCPC 3025 DMA OPC
Egbert 2.5 µm 1.0 µm (Oct. 2009)	1-w PSAP	Radiance 1-w Nephelometer, 2005-Oct 2008 TSI 3-w Nephelometer from Oct 2009	Quartz filter-pack *seven days	Teflon filter-pack *daily	CPC DMA APS
*Sample frequency w = wavelength