AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
Glyoxal in the Po Valley, Italy as a Tracer for Aqueous Aerosol Processing
KATE SKOG, Yong Lim, Amy P. Sullivan, Natasha Hodas, Barbara Turpin, Jeffrey L. Collett, Jr., Frank Keutsch, University of Wisconsin - Madison
Abstract Number: 668 Working Group: Aerosol Chemistry
Abstract Even though most aerosol in the atmosphere interacts with water, aqueous chemical processes are not well understood. Glyoxal, a secondary organic compound produced photochemically, has a high Henry’s law constant and has been shown to partition into aerosol. This makes glyoxal an ideal tracer for aqueous secondary organic aerosol formation. In June and July of 2012, the Madison Laser-Induced Phosphorescence instrument (Mad-LIP) was deployed to the San Pietro Capofiume, Italy field site for the Pan-European Gas-AeroSOls-climate interaction Study (PEGASOS) to measure gas phase glyoxal concentrations. Using these measurements, gas phase HOx measurements, modeled liquid water content, and the Lim et al. aqueous chemistry mechanism, the contribution of glyoxal to aqueous SOA was modeled and compared to measured aerosol composition. Contribution of glyoxal to oxalate, a compound prevalent in (aqueous) aerosol, will be discussed.