HR: 1340h
AN: A33B-0879 INVITED     [Abstracts]
TI: Development and Application of Cavity Ring-down Aerosol Extinction Spectroscopy
AU: * Baynard, T
EM: tbaynard@al.noaa.gov
AF: National Oceanic and Atmospheric Administration, 325 S. 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: Lovejoy, E
A33B-0879 AF: National Oceanic and Atmospheric Administration, 325 S. Broadway, Boulder, CO 80305 United States
AU: Pettersson, A
A33B-0879 AF: National Oceanic and Atmospheric Administration, 325 S. Broadway, Boulder, CO 80305 United States
AU: Pettersson, A
A33B-0879 AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO 80309 United States
AU: Lack, D
A33B-0879 AF: National Oceanic and Atmospheric Administration, 325 S. Broadway, Boulder, CO 80305 United States
AU: Lack, D
A33B-0879 AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO 80309 United States
AU: Massoli, P
A33B-0879 AF: National Oceanic and Atmospheric Administration, 325 S. Broadway, Boulder, CO 80305 United States
AU: Massoli, P
A33B-0879 AF: Cooperative Institute for Research in the Environmental Sciences, University of Colorado, Boulder, CO 80309 United States
AU: Ravishankara, A
A33B-0879 AF: National Oceanic and Atmospheric Administration, 325 S. Broadway, Boulder, CO 80305 United States
AB: Accurate measurement of the optical properties of aerosol is important for quantifying their influence on climate. Over the past few years we have developed pulsed cavity ring-down spectroscopy into a viable technique to determine light extinction by aerosol for both laboratory and atmospheric studies with high accuracy, excellent time resolution, and high sensitivity. Our work has focused on technique development, technique validation, aerosol optical properties closure analysis, determination of relative humidity (RH) dependence of aerosol optical properties, and atmospheric measurements. We present details on (a) the uncertainty associated with extinction measurements using CRD-AES including time resolution, interference affects, and RH issues; (b) comparisons with traditional measurement techniques; and (c) the ability of CRD-AES to improve and reduce uncertainty of complementary aerosol optical property measurement techniques.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0360 Radiation: transmission and scattering
DE: 0394 Instruments and techniques
DE: 3311 Clouds and aerosols
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005