HR: 17:15h
AN: A14D-06 [Abstracts]
TI: Airborne High Spectral Resolution Lidar Aerosol Measurements and Comparisons with Transport Models
AU: * Ferrare, R
EM: richard.a.ferrare@nasa.gov
AF: NASA Langley Research Center, NASA/LaRC, Hampton, VA 23681, United States
AU: Hostetler, C
EM: chris.a.hostetler@nasa.gov
AF: NASA Langley Research Center, NASA/LaRC, Hampton, VA 23681, United States
AU: Hair, J
EM: Johnathan.W.Hair@nasa.gov
AF: NASA Langley Research Center, NASA/LaRC, Hampton, VA 23681, United States
AU: Cook, A
EM: Anthony.L.Cook@nasa.gov
AF: NASA Langley Research Center, NASA/LaRC, Hampton, VA 23681, United States
AU: Harper, D
EM: David.B.Harper@nasa.gov
AF: NASA Langley Research Center, NASA/LaRC, Hampton, VA 23681, United States
AU: Burton, S
EM: s.p.burton@larc.nasa.gov
AF: SSAI/NASA/LaRC, One Enterprise Pkwy., Hampton, VA 23669, United States
AU: Obland, M
EM: m.d.obland@larc.nasa.gov
AF: NASA Langley Research Center, NASA/LaRC, Hampton, VA 23681, United States
AU: Rogers, R
EM: r.r.rogers@larc.nasa.gov
AF: SSAI/NASA/LaRC, One Enterprise Pkwy., Hampton, VA 23669, United States
AU: Kleinman, L
EM: kleinman@bnl.gov
AF: Brookhaven National Laboratory, Atmospheric Sciences Division, Upton, NY 11973, United
States
AU: Clarke, A
EM: tclarke@soest.hawaii.edu
AF: University of Hawaii, Dept. of Oceanography, Hawaii, HI 96822, United States
AU: Fast, J
EM: Jerome.Fast@pnl.gov
AF: Pacific Northwest National Lab, PO Box 999, Richland, WA 99352, United States
AU: Chin, M
EM: mian.chin@nasa.gov
AF: NASA Goddard Space Flight Center, Code 613.3, Greenbelt, MD 20771, United States
AU: Carmichael, G
EM: gcarmich@engineering.uiowa.edu
AF: University of Iowa, CGRER, Iowa City, IA 52442, United States
AU: Tang, Y
EM: ytang@cgrer.uiowa.edu
AF: University of Iowa, CGRER, Iowa City, IA 52442, United States
AU: Emmons, L
EM: emmons@ucar.edu]
AF: National Center for Atmospheric Research, Atmospheric Chemistry Division, Boulder, CO
80307, United States
AU: Pierce, B
EM: Brad.Pierce@noaa.gov
AF: NOAA/NESDIS, 1225 W. Dayton St., Madison, WI 53707, United States
AU: Kittaka, C
EM: chieko.kittaka-1@nasa.gov
AF: SSAI/NASA/LaRC, One Enterprise Pkwy., Hampton, VA 23669, United States
AB:
The NASA Langley Research Center (LaRC) airborne High Spectral Resolution Lidar (HSRL) measured aerosol
distributions and optical properties during several field experiments in 2006 and 2007. These experiments
include: 1) the joint Megacity Initiative: Local and Global Research Observations (MILAGRO) /Megacity Aerosol
Experiment in Mexico City (MAX-MEX)/Intercontinental Chemical Transport Experiment-B (INTEX B) experiment, 2)
the Texas Air Quality Study (TEXAQS)/Gulf of Mexico Atmospheric Composition and Climate Study (GoMACCS), 3)
the San Joaquin Valley experiment, 4) the Cumulus Humilis Aerosol Processing Study (CHAPS), and 5) the
Cloud Aerosol Lidar and Infrared Pathfinder Satellite Observation (CALIPSO) and Twilight Zone (CATZ)
experiment. The LaRC airborne HSRL uses the spectral distribution of the lidar return signal to measure aerosol
extinction and backscatter profiles independently at 532 nm and uses standard backscatter lidar techniques to
derive aerosol backscatter and extinction profiles at 1064 nm. Aerosol depolarization profiles are measured at
both wavelengths. The HSRL collected over 350 hours of aerosol measurements during these experiments.
Airborne HSRL data acquired during these missions were used to infer aerosol types, characterize the spatial
and vertical distributions of these aerosol types, and to apportion aerosol extinction and optical thickness (AOT)
among the various aerosol types. Initial results show that a mixture of nonspherical (i.e. dust) and urban
aerosols accounted for over half of the AOT measured by the HSRL during the MILAGRO flights over Mexico; in
contrast, during the GoMACCS and CALIPSO validation flights over Houston and the eastern U.S., respectively,
urban/biomass aerosols accounted for 80-90% of the AOT. Preliminary investigations using airborne in situ
measurements of aerosol microphysical properties generally support the variability of aerosol types inferred from
the HSRL data. The distributions of aerosol extinction, optical thickness, and aerosol types in relation to the
Planetary Boundary Layer (PBL) and free troposphere will also be discussed.
The HSRL measurements were also used to help evaluate the ability of transport models to reproduce aerosol
extinction and optical thickness profiles and represent horizontal and vertical variations in aerosol types. This
presentation will describe how the HSRL measurements were used to assess these models as well as how the
model simulations were used to help interpret the HSRL measurements. Simulations from several models will
be discussed.
UR: http://science.larc.nasa.gov/hsrl/index.html
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 3360 Remote sensing
DE: 4801 Aerosols (0305, 4906)
DE: 4906 Aerosols (0305, 4801)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting