AAAR 35th Annual Conference October 17 - October 21, 2016 Oregon Convention Center Portland, Oregon, USA
Abstract View
Clustering of Time-resolved Raman Spectra Measured Using an Aerosol Raman Spectrometer
DAVID DOUGHTY, Steven Hill, US Army Research Lab
Abstract Number: 482 Working Group: Urban Aerosols
Abstract We study temporal changes of ambient aerosol measured using an automated aerosol Raman spectrometer (ARS) developed by Battelle (called the REBS). This ARS automatically samples aerosol and measures Raman spectra of individual particles from these particles. We present results from 24 hours of ambient sampling near the Washington, DC area in the United States, analyzing over 10,000 individual spectra. These results are clustered into several categories including inorganics of various types, organics, and soot and humic like substances (HULIS). Time-series of the numbers of spectra which fall into various clusters are shown. Relationships between meteorological variables and the types of Raman spectra are also examined.