Session: Secondary Organic Aerosols: Formation, Properties, and Atmospheric Evolution (96th American Meteorological Society Annual Meeting)

Thursday, 14 January 2016: 1:30 PM-3:00 PM

Room 356 ( New Orleans Ernest N. Morial Convention Center)

Host: 18th Conference on Atmospheric Chemistry

Cochairs:

Alla Zelenyuk, PNNL, Richland, WA and Jason Surratt, Univ. of North Carolina, Chapel Hill, NC

Recent laboratory and field studies provided new insights into formation, growth, phase, viscosity, and volatility of secondary organic aerosols (SOA). The data indicate that under most atmospheric conditions SOA particles are significantly more viscous and orders of magnitude less volatile than assumed in traditional modeling approaches. In addition, recent SOA formation yield measurements cast doubt on previously reported values. This session will broadly highlight new results of experimental and modeling studies that address these aspects of SOA and their effect on SOA atmospheric loadings, evolution, and effect on climate.

Papers:

1:30 PM

5.1

Uptake and Release of Gaseous Species Accompanying the Reactions of Isoprene Photo-Oxidation Products with Sulfate Particles (Invited Presentation)

Scot T. Martin, Harvard University, Cambridge, MA; and Y. Liu, M. Kuwata, and K. A. McKinney

1:45 PM

5.2

New Approaches for SOA Modeling Based on Recent Experimental Results (Invited Presentation)

Manishkumar Shrivastava, PNNL, Richland, WA; and A. Zelenyuk, R. C. Easter, J. D. Fast, C. Zhao, Y. Qian, P. Rasch, and S. Ghan

Recorded Presentation

2:00 PM

5.3

Mulitphase Chemistry Promotes Isoprene SOA Formation: Recent Results from Field and Lab Studies

Jason D. Surratt, University of North Carolina, Chapel Hill, NC; and M. Riva, A. Gold, Y. H. Lin, Z. Zhang, S. H. Budisulistiorini, T. Cui, Y. Chen, W. Vizuete, W. Rattanavaraha, K. Chu, T. Riedel, J. A. Thornton, A. Zelenyuk, and M. Glasius

2:15 PM

5.4

The Effect of Hydrophobic Gas-phase Organics on Nucleation, Mass Loading, Volatility, Viscosity, and Oligomer Content of SOA Particles

Alla Zelenyuk, PNNL, Richland, WA; and D. Imre, J. Wilson, D. Bell, J. Beranek, and M. Shrivastava

2:30 PM

5.5

Using Microfluidics to Measure Surface-Bulk Partitioning of Aerosol Constituents

Andrew R. Metcalf, University of Minnesota, Minneapolis, MN; and H. Boyer and C. S. Dutcher

2:45 PM

5.6

Surface Tension Modeling of Secondary Organic Aerosol Chemical Mimics

Hallie Boyer, University of Minnesota, Minneapolis, MN; and C. Dutcher