AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
Investigation of the Physical and Chemical Changes of Atmospheric Aerosols during Fog in Baengyeong Island, South Korea Using High Resolution Time of Flight Aerosol Mass Spectrometry
TAEHYOUNG LEE, Taehyun Park, Alexandra Boris, Yongjae Lim, Junyoung Ahn, Haejin Jung, Youngkyo Seo, Donghee Jung, Seokjun Seo, Jeffrey Collett, Hankuk University of Foreign Studies
Abstract Number: 654 Working Group: Aerosols, Clouds, and Climate
Abstract Fogs/clouds can play both a physical and chemical role in the fate of atmospheric species. Fogs/clouds act as processors of atmospheric aerosol particles and trace gases by aqueous oxidation of gas phase precursors and the interaction of aerosol with atmospheric water and also cleansing of the atmosphere by scavenging and removal of atmospheric particles. In addition to playing a central role in the hydrologic cycle and influencing atmospheric radiative transfer, clouds interact with a variety of chemical species. Together with gases and particles, clouds and fogs comprise a complex multiphase system.
To understand the interaction of aerosol with fogs/clouds better, we conducted a fog sampling campaign and physical and chemical measurements of aerosol at the Baengyeong Island (Intensive Air Quality Monitoring Station), South Korea, during June – July, 2014 and 2015 using a compact version of the Caltech Active Strand Cloudwater Collector known as the CASCC2 and a two-stage fog/cloud water collector (sf-CASCC) that collects “small” and “large” drops. The chemical composition and physical properties of aerosol particles before, after and during fog were characterized by a high resolution time of flight aerosol mass spectrometer (HR-ToF-AMS, Aerodyne), an Aerodynamic Particle Sizer (APS, TSI), a Scanning Mobility Particle Sizer (SMPS, TSI) and Fog Monitor (FM-100, DMT). The presentation will provide an overview of the chemical composition of aerosol and examine changes in particle chemical composition and microphysics by fog/cloud processing in the boundary layer.