Deriving chemical mass spectral signatures of aqueous-phase SOA formed due to oxidation of biomass burning emissions for analysis of ASR/ARM field datasets
EMSL Project ID
51153
Abstract
Secondary organic aerosol (SOA) formed by multiphase chemical reactions in the atmosphere greatly contribute to fine particulate matter and organic aerosols (OA). Despite mounting evidence, aqueous- and cloud-phase SOA formation remains one of the least understood aspects of OA formation in the atmosphere. Recent U.S. Department of Energy (DOE) - supported Atmospheric Radiation Measurements (ARM) field measurements provide a wealth of high-resolution mass spectrometry data of SOA using online in-situ measurements such as the high-resolution, time-of-flight–aerosol mass spectrometer (HR-ToF–AMS) and/or the single particle mass spectrometer (SPLAT II) over different locations (e.g. over the Southern Great Plains (SGP) site in Oklahoma City and the Amazon rainforest). However, a critical knowledge gap exists in terms of identifying unique mass spectral signatures of aqueous-phase biomass-burning SOA formation pathways. We will use the proposed EMSL measurements to acquire representative mass spectra signatures of laboratory-generated aqueous SOA processes, and search for these signatures within field measurements during Holistic Interactions of Shallow Clouds, Aerosols, and Land Ecosystems (HI-SCALE) campaign and the Green Ocean Amazon (GoAmazon 2014/5) campaign. Ultimately, these molecular tracer analyses will be used to unravel the role of aqueous chemistry affecting SOA from biomass burning emissions and their interactions with clouds and radiative forcing.
Project Details
Start Date
2019-10-03
End Date
2020-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Team Members
Related Publications
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