AAAR 32nd Annual Conference
September 30 - October 4, 2013
Oregon Convention Center
Portland, Oregon, USA
Abstract View
Direct Determination of Soot Mass Absorption and Mass Extinction Coefficients at Multiple Wavelengths
JAMES RADNEY, Christopher Zangmeister, Michael Zachariah, National Institute of Standards and Technology
Abstract Number: 392 Working Group: Carbonaceous Aerosols in the Atmosphere
Abstract The in-situ measurement of mass absorption and mass extinction coefficients – MAC and MEC, respectively – of laboratory generated soot aerosol at multiple visible wavelengths will be presented. A tandem differential mobility analyzer, aerosol particle mass analyzer, photoacoustic spectrometer, cavity ring-down spectrometer and condensation particle counter was used for these measurements. We observe that the MAC is a direct function of mass while the MEC demonstrates both mass and mobility diameter dependencies. Potential implications of MEC complexity in deriving SSA for soot will also be discussed.