HR: 08:15h
AN: A21D-02    [Abstracts]
TI: Boundary-Layer Ozone Production at South Pole, Antarctica
AU: * Helmig, D
EM: Detlev.Helmig@Colorado.edu
AF: Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309-0450 United States
AU: Johnson, B
AF: National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, CO 80305 United States
AU: Davis, D
AF: School of Earth and Atmospheric Sciences, Georgia Institute of Technology, Atlanta, CO 30332 United States
AU: Eisele, F
AF: National Center of Atmospheric Research, Table Meas Dr., Boulder, CO 80307 United States
AU: Neff, W
AF: National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, CO 80305 United States
AU: Oltmans, S
AF: National Oceanic and Atmospheric Administration, 325 Broadway, Boulder, CO 80305 United States
AU: Oncley, S
AF: National Center of Atmospheric Research, Table Meas Dr., Boulder, CO 80307 United States
AU: Warshawsky, M
AF: AzeoTech Inc., 443 Allison Street, Ashland, OR 97520 United States
AU: Brown, I
AF: Institute of Arctic and Alpine Research, University of Colorado, Boulder, CO 80309-0450 United States
AB: The distribution of ozone in the surface and planetary boundary layer was studied during the 2003/2004 Antarctic Tropospheric Chemistry Investigation (ANTCI) at South Pole, Antarctica from Dec. 13-30, 2003. A tethered balloon sampling platform was utilized for high spatial and temporal resolution measurements of ozone, temperature, wind speed, wind direction and water vapor between the surface and 500 m above ground. During several occasions ozone production of up to ~ 20 ppb was observed in the surface layer. These periods lasted several days and coincided with conditions of suppressed vertical mixing. The data further emphasize that ozone is produced in the Antarctic planetary boundary layer during the austral summer by photochemical reactions and due to the presence of large amounts of NO emitted from the snow. The tethered balloon data allow an in-depth analysis of the meteorological and chemical conditions that determine ozone production and transport at South Pole.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0315 Biosphere/atmosphere interactions
DE: 0365 Troposphere--composition and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting