HR: 0830h
AN: A51E-0722    [PDF]
TI: Aerosol Optical Properties at NEAQS 2002 From Lidar, Sunphotometer, and Integrating Nephelometer
AU: * Eberhard, W L
EM: wynn.eberhard@noaa.gov
AF: NOAA Environmental Technology Laboratory, R/ETL2 U.S. Dept. of Commerce 325 Broadway, Boulder, CO 80305 United States
AU: Senff, C J
EM: christoph.senff@noaa.gov
AF: CIRES, University of Colorado and NOAA/ETL, R/ETL2 U.S. Dept. of Commerce 325 Broadway, Boulder, CO 80305 United States
AU: Quinn, P K
EM: Patricia.K.Quinn@noaa.gov
AF: NOAA Pacific Marine Environmental Laboratory, 7600 Sand Point Way NE, Seattle, WA 98115 United States
AU: Alvarez, R J
AF: NOAA Environmental Technology Laboratory, R/ETL2 U.S. Dept. of Commerce 325 Broadway, Boulder, CO 80305 United States
AU: McCarty, B J
AF: CIRES, University of Colorado and NOAA/ETL, R/ETL2 U.S. Dept. of Commerce 325 Broadway, Boulder, CO 80305 United States
AB: Optical measurements of aerosols were performed from the NOAA Research Vessel Ron Brown near the east coast of the United States for 3 weeks starting mid-July 2002. The instruments included a lidar (355 nm wavelength), a handheld sunphotometer (380, 440, 500, 675, and 870 nm), and an integrating nephelometer (450, 550, and 700 nm). Lidar extinction profiles are derived with constraint from the sunphotometer aerosol optical depth data when available. Typical extinction-to-backscatter values from these measurements for the same airmass types are used to retrieve extinction profiles at night and in cloudy periods. Temperature profile and wind shear data from radiosondes and vertical smoothness of the lidar backscatter profile are used to determine the vertical extent of the layer in which the aerosol particles can be considered well mixed. The fraction of the total column aerosol that is characterized by the near-surface in situ measurements is estimated from the lidar profile and depth of the mixed layer. Extinction values from the lowest gates of the lidar are compared with the nephelometer's aerosol scatter data when the atmosphere is apparently well mixed between the two heights. The optical characteristics for various sources (urban, rural, and maritime) are contrasted.
DE: 0305 Aerosols and particles (0345, 4801)
DE: 0345 Pollution--urban and regional (0305)
DE: 0394 Instruments and techniques
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting