HR: 13:55h
AN: A33G-02    [Abstracts]
TI: An Overview of the Cumulus Humilis Aerosol Processing Study
AU: * Berkowitz, C M
EM: carl.berkowitz@pnl.gov
AF: AU: Berg, L K
EM: larry.berg@pnl.gov
AF: AU: Ogren, J A
EM: John.A.Ogren@noaa.gov
AF: Earth System Research Laboratory National Oceanic and Atmospheric Administration, 325 Broadway/CMDL1, Boulder, CO 80305,
AU: Hostetler, C A
EM: Chris.A.Hostetler@nasa.gov
AF: Science Directorate NASA Langley Research Center, Mail Stop 420, B1250, Room 156, Hampton, VA 23681,
AU: Ferrare, R
EM: richard.a.ferrare@nasa.gov
AF: Science Directorate NASA Langley Research Center, Mail Stop 420, B1250, Room 156, Hampton, VA 23681,
AU: Hair, J W
EM: j.w.hair@larc.nasa.gov
AF: Science Directorate NASA Langley Research Center, Mail Stop 420, B1250, Room 156, Hampton, VA 23681,
AU: Hubbe, J M
EM: john.hubbe@pnl.gov
AF: AB: The U.S. Department of Energy's (DOE) Atmospheric Science Program (ASP) conducted a field campaign to investigate the processing of aerosols by fields of shallow cumuli in the vicinity of Oklahoma City during June 2007. This study, called the Cumulus Humilis Aerosol Processing Study (CHAPS) involved two research aircraft. One aircraft, the ASP Gulfstream 1, was used for in-situ sampling of aerosol size, composition and optical properties, below, within, and immediately above the cloud layers. A sampling system was devised that used two aerosol inlets, an isokinetic inlet and an inlet equipped with a Counter Flow Virtual Impactor (CVI). The CVI is designed to allow only cloud drops to enter the inlet and evaporate, allowing us to examine the composition of the residual mass within the cloud drops. Aerosols from each inlet were directed into nearly identical sets of instruments. The second aircraft, the NASA Langley King Air, carried the NASA High Spectral Resolution Lidar (HRSL) that was used to obtain profiles of aerosol backscattering and extinction. In addition to the two aircraft, data were also collected at a surface site just north of Oklahoma City. The coordinated G-1 and King Air flight patterns and instrumentation will be described. Data analysis has started, and our data processing techniques and preliminary results will be presented.
UR: http://asp.labworks.org/
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0320 Cloud physics and chemistry
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting