Aerosols and Clouds
Airborne measurement of inorganic ionic components of fine aerosol particles using the particle-into-liquid sampler coupled to ion chromatography technique during ACE-Asia and TRACE-P
Article first published online: 13 SEP 2003
Copyright 2003 by the American Geophysical Union.
Journal of Geophysical Research: Atmospheres (1984–2012)
Volume 108, Issue D23, 16 December 2003
How to Cite
2003), Airborne measurement of inorganic ionic components of fine aerosol particles using the particle-into-liquid sampler coupled to ion chromatography technique during ACE-Asia and TRACE-P, J. Geophys. Res., 108, 8646, doi:10.1029/2002JD003265, D23., et al. (
- Issue published online: 13 SEP 2003
- Article first published online: 13 SEP 2003
- Manuscript Accepted: 28 MAR 2003
- Manuscript Revised: 7 MAR 2003
- Manuscript Received: 1 DEC 2002
 Eight inorganic ions in fine aerosol particles (Dp < 1.3 μm) were measured on board the NCAR C130 and NASA P-3B aircraft during the 2001 Aerosol Characterization Experiment (ACE)-Asia and the Transport and Chemical Evolution over the Pacific (TRACE-P) experiments, respectively. Concentrations of NH4+, SO42−, NO3−, Ca2+, K+, Mg2+, Na+, and Cl− were determined using a particle-into-liquid sampler coupled to ion chromatography (PILS-IC) technique at a 4-min resolution and a limit of detection <0.05 μg m−3. The maximum total ion concentrations observed on the C130 and the P-3B were 27 μg m−3 and 84 μg m−3, respectively. During ACE-Asia, NH4+ and SO42− dominated, with the dust-derived Ca2+ contributing nearly equally as SO42− in mixing ratios. The sea-salt-derived Na+ and Cl− were comparable to biomass-burning tracer K+, showing >1 ppbv only in the top 1% sample population. During TRACE-P, NH4+ dominated, followed by SO42−, Cl−, Na+, NO3−, Ca2+, and K+, in decreasing order of importance. In addition to a sea-salt origin, Cl− showed a source in urban emissions possibly related to biofuel combustion. Both sea salt and dust contributed to Mg2+. In both experiments, NH4+, SO42−, NO3−, and CO were strongly correlated, indicating that combustion was the dominant source of these species and that NH3 and other alkaline materials were in sufficient supply to neutralize H2SO4. The [NH4+] to ([NO3−] + 2[SO42−]) ratio was ∼0.70 in the two campaigns, with deviations found only in volcano plumes, whereby SO42− was found to correlate with SO2. Charge balance of the ions showed both positive and negative deviations whose magnitudes, ∼30%, provide estimates of the lower limits of unmeasured ions. Elevated NO3− and Ca2+ coexist mainly under polluted conditions, suggesting the importance of sequestering HNO3 by mineral dust.