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Chemical Changes in Atmospheric Aerosols

Aerosols containing soot and polyaromatic hydrocarbons are emitted into the atmosphere as products of incomplete combustion. Sarah Brooks' group is using Fourier Transform Infrared Spectroscopy and Horizontal Attenuated Total Reflectance to identify the chemical characteristics of surfaces of soot and polyaromatics and to observe how those characteristics evolve over time in an oxidizing atmosphere.

Measurements of Ice Nucleation

Members of Sarah Brooks' group are conducting measurements of ice nucleation events in laboratory and field campaigns. Instrumentation employed here includes the continuous flow diffusion chamber for in-situ aircraft measurements of ice nuclei and a high resolution ice microscope for freezing experiments.

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