Jennifer Murphy, Greg Wentworth Department of Chemistry, University of Toronto NH 4 + (aq) NH 3(g) DMS (aq) DMS (g) SO 2(g) H 2 SO 4(g) MSA (g) neutralization.

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Presentation transcript:

Jennifer Murphy, Greg Wentworth Department of Chemistry, University of Toronto NH 4 + (aq) NH 3(g) DMS (aq) DMS (g) SO 2(g) H 2 SO 4(g) MSA (g) neutralization

Range of Arctic Marine Boundary Layer NH 3

MBL Aerosol Neutralization and Acidity

NH 4 + (aq) NH 3(g) DMS (aq) DMS (g) SO 2(g) H 2 SO 4(g) MSA (g) Nitrogenous Bases and New Particle Formation New particle formation RNH 2(g) RNH 3 + (aq) organic amines e.g. Almeida et al., Nature, 2013 Dawson et al., PNAS, 2012

Atmos Chem Phys, 2013 SO4 NH4 org Riddick et al., Atmos Env, 2012

Chang et al., JGR-Atmos, 2011 Do emissions from Arctic seabird colonies influence particle growth/formation?

Ambient Ion Monitor-Ion Chromatograph (AIM-IC) Greg Wentworth (3 rd Year PhD, U of T Chemistry) Simultaneous quantification of water soluble gases & PM 2.5 – Hourly time resolution, on Amundsen Will optimize for MSA, anything else…? Markovic et al. (2012) J. Environ. Monit., 14, PM 2.5 ~LoD (ug/m 3 )Gas Phase~LoD (ppb) Na Na - NH NH K+K K - Mg Mg - Ca Ca - Cl HCl NO HONO 0.02 NO HNO Br - 0.2ng/m 3 HBr 0.2ppt SO SO Acetate Acetic Acid 0.05 Formate Formic Acid 0.1 Oxalate Oxalic Acid Amines* ~1pg/m 3 Amines* ~0.1ppt *VandenBoer et al. (2012) J. Chrom. A, 1252, 74.