AAAR 33rd Annual Conference
October 20 - October 24, 2014
Rosen Shingle Creek
Orlando, Florida, USA
Abstract View
In-situ Measurement of the Aerosol Absorption Spectrum as a Function of Particle Size: Implications for Climate Change
CHRISTOPHER ZANGMEISTER, James Radney, National Institute of Standards and Technology
Abstract Number: 222 Working Group: Aerosols, Clouds, and Climate
Abstract he absorption spectrum of any material is a direct function of its underlying chemical and physical properties, with the absorption strength at a specific wavelength depending upon the amount of material present and the complex refractive index. We will present visible spectrum (500 nm to 825 nm) absorption measurements of weakly absorbing atmospherically relevant aerosol using a supercontinuum phot acoustic spectrometer. We show that the aerosol absorption spectrum depends on both the material and particle size. Using these results, we’ll illustrate the sensitivity of radiative forcing predictions on these underlying spectral dependences.