Environmental & Climate Sciences Department Seminar

"Understanding Aqueous-Phase Chemistry of Organic Aerosol via Field Observations and Laboratory Studies"

Presented by Qi Zhang, UC Davis

Thursday, May 19, 2022, 11:00 am — Videoconference / Virtual Event (see link below)

Aqueous-phase reactions can produce and transform atmospheric organic aerosols in important ways, but the processes remain poorly understood. As an effort to close this knowledge gap, we have performed laboratory and field studies to investigate the photochemical formation and aging of organic compounds in atmospheric aqueous phases. I will present ambient observations from areas of high humidity, where aqueous reactions are shown to be an important source of oxygenated and nitrogen-containing SOA and can significantly influence the light-absorption properties of BrC. I will also present results from lab-based experiments on the aqueous-phase oxidation of phenols (an important class of VOCs/SVOCs from biomass burning) and the formation and aging of SOA and BrC over the course of simulated sunlight illumination. Finally, I will present some results from integrated analysis of ambient aerosol mass spectrometry data to eludicate the role that aqueous-phase chemistry plays on aerosol chemistry.

Hosted by: Maria Zawadowicz

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