Hi Everyone,

SOCAAR is pleased to announce our next SOCAAR Seminar:

Please join us Online on:

Wednesday,  February 7, 2024
3:00PM - 4:00PM EST

Prof. Jonathan (Nate) Slade
Assistant Professor
Department of Chemistry & Biochemistry
University of California, San Diego

Into the Mist: Sea Spray Aerosol Molecular Composition, Viscosity, and Multiphase Chemistry

The phase state or viscosity of aerosols plays a crucial role in various atmospheric processes, including ice nucleation, water absorption, and heterogeneous reaction kinetics. Despite its significance, limited research has explored the viscosity of sea spray aerosol (SSA), which represents the largest annual mass flux of naturally occurring aerosols globally. Combining online high-resolution mass spectrometry aerosol composition measurements with particle bounce, my group studies the molecular drivers of SSA viscosity and its effects on multiphase oxidation processes. In this talk, I will highlight our efforts in determining (1) the viscosity and molecular composition of SSA across distinct biologically-active periods of a phytoplankton bloom, (2) size-dependent SSA viscosity, and the role of cation–organic interactions driving differences in viscosity with particle size, and (3) viscosity impacts on the photochemical and heterogeneous oxidation kinetics of plastic additives in SSA mimics in the presence of model photosensitizers.

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