AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
Secondary Organic Aerosol Yields from Isoprene under High NO Conditions
REBECCA SCHWANTES, Tran Nguyen, Kelvin Bates, Xuan Zhang, Yuanlong Huang, Richard Flagan, John Seinfeld, Caltech
Abstract Number: 219 Working Group: Aerosol Chemistry
Abstract Recently, many advances have been made to improve our understanding of how chamber conditions influence Secondary Organic Aerosol (SOA) yields. These improvements warrant relooking at SOA yields previously done on isoprene under high NO conditions to tease out what regimes and conditions are most important for SOA growth. The effect of seed surface area, NO2/NO ratio, temperature, and Relative Humidity on isoprene SOA yields under high NO conditions will be explored. Experiments were run in a very controlled manner such that differences in SOA growth can be attributed directly to changing chamber conditions. Additionally, the gas-phase and particle-phase chemistry was monitored throughout these experiments by a chemical ionization mass spectrometer and aerosol mass spectrometer, respectively. The specific chemistry causing differences in the SOA yield will be discussed in detail.