10th International Aerosol Conference
September 2 - September 7, 2018
America's Center Convention Complex
St. Louis, Missouri, USA

Abstract View

Blowing Snow Influences on Aerosol Composition: Insights from Bulk and Single Particle Measurements in Coastal Antarctica

MICHAEL GIORDANO, Anita Avery, J. Doug Goetz, Lars Kalnajs, Kerri Pratt, Nathaniel May, Alex Lee, Peter DeCarlo, Drexel University

Abstract Number: 1529
Working Group: Remote/Regional Atmospheric Aerosol

Abstract
In the cryosphere, many open questions regarding aerosol production, processing, transport, and lifetimes still exist. Recent evidence suggests that blowing snow may significantly alter these aerosol processes on both local and regional scales but real-time, on-line evidence is scant. This presentation focuses on both bulk composition changes and single particle results from deploying a suite of instruments, including an aerosol mass spectrometer (AMS), to the Antarctic sea ice during the 2ODIAC campaign, with a focus on blowing snow events. Bulk measurements of the supermicron aerosol and blowing snow samples show that ion ratios are overall consistent with seawater ion ratios, contrary to the submicron ion ratios which show enhancements in sea salt (Na and Cl) concentrations. In the submicron aerosol, these bulk composition changes are shown to be independent from air mass origins. Furthermore, in the snow, no evidence of bromine production is observed indicating that these important reactions are likely occurring in the aerosol scale. Additionally, single particle results from the AMS show a variety of chemical species in addition to sulfates in the submicron aerosol mass. K-means cluster analysis also shows distinct changes in the overall aerosol mass spectra during to blowing snow events.