Environmental & Climate Sciences Department Seminar

"Chemistry of nonrefractory submicron aerosol in urban industrialized Texas: first results from TRACER"

Presented by Maria Zawadowicz, Brookhaven National Laboratory

Thursday, February 24, 2022, 11:00 am — Videoconference / Virtual Event(videoconference link to be announced)

Atmospheric aerosols, microscopic particles suspended in air, play an important role in the Earth System as key factors in radiative transfer, cloud formation and water cycle. Several climactically important properties of aerosols, such as index of refraction, hygroscopicity and ability to seed ice clouds, are functions of their chemical composition. Atmospheric aerosols are complex mixtures of organic and inorganic components—their composition reflects their emission source, photochemical age, and interactions with other components of the atmosphere: reactive trace gases, cloud and rain droplets and gas-phase oxidants. Comprehensive characterization of these chemically complex and dynamic mixtures is generally achieved by mass spectrometry, both in situ and off-line, following collection of aerosols on filter. Aerosol and trace gas mass spectrometers produce multivariate datasets rich in information. The topic of this seminar is an overview of data collected by the ACSM deployed at the on-going TRacking Aerosol-Convection interactions ExpeRiment (TRACER) campaign in Houston, TX. I will discuss on-going efforts in data quality assessment and source apportionment of the TRACER ACSM data.

Hosted by: Olga Mayol-Bracero

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