AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
Raman Spectra of Individual Ambient Particles
DAVID DOUGHTY, Steven Hill, Alan Wetmore, US Army Research Lab
Abstract Number: 490 Working Group: Carbonaceous Aerosols in the Atmosphere
Abstract It is important to quantify temporal and spatial distributions of supermicron particles in the atmosphere, including fungal spores, pollens, dust, soot, and other organic and inorganic materials. We evaluate the Resource Effective Bioidentification System (REBS) for the purposes of understanding particle composition. The REBS is designed for field operation, and semi-continuously measures Raman spectra of individual particles, by capturing particles on a metallized polymer film and then taking Raman spectra of these particles.
A goal of this preliminary study is to compare the ambient Raman spectra measured by the REBS at different locations, primarily in the Mid-Atlantic region of the USA. We examine the fraction of single-particle spectra which can be categorized, and examine the differences between the spectra seen in various locations and wind directions. Spectra obtained near the Atlantic Ocean, and at inland locations will be illustrated.