Table B3b. CHAiOS Instrumentation for Aerosol and Ancillary Data Measurements

Species/Parameter	Reference	Technique	Averaging Time	Detection Limit
Aerosol bulk and size-segregated ionic composition	Pszenny et al. [2004]	bulk filters and cascade impactors/ion chromatography	15 hours (daytime) or 9 hours (nighttime)	~0.2 to ~50 ng m-3 for individual species
Aerosol total Br and I	Pszenny et al. [2004] and Rahn et al. [1976]	bulk filters and cascade impactors/neutron activation	15 hours (daytime) or 9 hours (nighttime)	Br ~ 0.2 ng m-3, I ~ 1.5 ng m-3
Aerosol organic functional groups	Gilardoni et al. (submitted manuscript, 2006)	FTIR spectroscopy of <1 mum particles on Teflon filters	4-12 hours	1 mug
Aerosol number	Russell et al. (submitted manuscript, 2006)	CNC (TSI 3025)	1 s	~5 cm-3
Aerosol size distribution	Russell et al. (submitted manuscript, 2006)	DMA and APS	3 m	¦
Photolytic flux		Bentham spectroradiometer, model DMc 150 FC	5 m	unknown