HR: 1340h
AN: A33B-0880    [Abstracts]
TI: Sensitivity, Calibration and Uncertainty Developments for Aerosol Absorption Measurement using Photoacoustic Absorption Spectroscopy
AU: * Lack, D
EM: Daniel.Lack@noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO 80309 United States
AU: * Lack, D
EM: Daniel.Lack@noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmopsheric Administration, 325 Broadway, Boulder, CO 80305 United States
AU: Lovejoy, E
EM: nlovejoy@al.noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmopsheric Administration, 325 Broadway, Boulder, CO 80305 United States
AU: Baynard, T
EM: tbaynard@al.noaa.gov
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO 80309 United States
AU: Baynard, T
EM: tbaynard@al.noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmopsheric Administration, 325 Broadway, Boulder, CO 80305 United States
AU: Pettersson, A
EM: anders.pettersson@foi.se
AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO 80309 United States
AU: Pettersson, A
EM: anders.pettersson@foi.se
AF: Aeronomy Laboratory, National Oceanic and Atmopsheric Administration, 325 Broadway, Boulder, CO 80305 United States
AU: Ravishankara, A
EM: ravi@al.noaa.gov
AF: Aeronomy Laboratory, National Oceanic and Atmopsheric Administration, 325 Broadway, Boulder, CO 80305 United States
AB: Reducing the uncertainties in climate forcing due to aerosols is essential to provide meaningful and bounded model predictions of future climate. Light absorption by aerosols is one of the most uncertain and difficult quantities to measure. We will describe the development of a photoacoustic spectrometer capable of fast and sensitive measurement of aerosol absorption (detection limit = 0.08Mm-1 @ 30 sec). We will also describe a precise calibration method at atmospherically relevant absorption levels, independent validation of the technique and introduce a potential absorbing aerosol standard for measuring aerosol absorption.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0305 Aerosols and particles (0345, 4801, 4906)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005