Molecular composition and phase characteristics of secondary organic aerosols (SOA) relevant to the FIX2014 and SOAS2013 campaigns
EMSL Project ID
48275
Abstract
Secondary organic aerosols (SOA) can be a large component of the troposphere, potentially altering visibility, human health, atmospheric chemistry, and climate patterns on a regional scale. The proposed work explores novel chemistry of the first- and second-generation oxidation products of isoprene and alpha-pinene, two of the most abundant atmospheric non-methane hydrocarbons. The major goal is to characterize the SOA molecular-level composition and phase states using the high-resolution mass spectrometry and spectroscopy capabilities of EMSL. The results will supplement recent collaborative field and laboratory efforts that focused mainly on gas-phase characterization, thereby completing the story on the oxidation mechanisms of atmospherically-important biogenic compounds. Details on the chemical mechanism and yields from these biogenic reactions will be used to update regional and global chemistry models in order to more-accurately predict climate responses to anthropogenically-driven inputs.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2014-10-01
End Date
2016-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
Nguyen TB, KH Bates, JD Crounse, RH Schwantes, X Zhang, HG Kjaergaard, JD Surratt, P Lin, A Laskin, JH Seinfeld, and PO Wennberg. 2015. "Mechanism of the hydroxy radical oxidation of methacryoyl peroxynitrate (MPAN) and its pathway toward secondary organic aerosol formation in the atmosphere." Physical Chemistry Chemical Physics. PCCP 17(27):17914-17926. doi:10.1039/c5cp02001h