HR: 1340h
AN: A33B-0883    [Abstracts]
TI: Aerosol Extinction and Angstrom Exponent Retrieved From Ground-Based Near-Infrared Solar Absorption Spectra
AU: * Aleks, G K
EM: gka@gps.caltech.edu
AF: California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125 United States
AU: Toon, G C
EM: Geoffrey.C.Toon@jpl.nasa.gov
AF: NASA Jet Propulsion Laboratory, 4800 Oak Grove Dr, Pasadena, CA 91109 United States
AU: Washenfelder, R A
EM: rebeccaw@gps.caltech.edu
AF: California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125 United States
AU: Wennberg, P O
EM: wennberg@gps.caltech.edu
AF: California Institute of Technology, 1200 E California Blvd, Pasadena, CA 91125 United States
AU: Clarke, A
EM: tclarke@soest.hawaii.edu
AF: University of Hawaii, 1000 Pope Rd MSB500 Department of Oceanography, Honolulu, HI 96822 United States
AB: Improved measurements of aerosol optical properties are essential to constrain models of global and regional climatic forcing potential. Moreover, accurate determination of aerosol scattering properties is necessary to reduce uncertainty in space-based retrievals of atmospheric gases. We have recorded near-IR solar spectra over Park Falls, Wisconsin since May 2004 using a Bruker IFS125 Fourier Transform Spectrometer. These data are analyzed to obtain aerosol optical depth and angstrom exponent. We evaluate our results against aircraft and space-based data. On four days in July and August 2004, as part of the INTEX campaign, the DC-8 made flight profiles over Park Falls and recorded measurements of aerosol parameters including size distribution, composition, and extinction coefficients. We use a forward model to compare the in-situ aerosol properties to our column optical depth results. Additionally, our ground-based estimates are compared to optical depth and angstrom exponent determined from MISR data.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005