HR: 0800h
AN: A11B-0879    [Abstracts]
TI: Water-side Turbulence Enhancement of Ozone Deposition to the Ocean
AU: Hare, J
EM: jeff.hare@uea.ac.uk
AF: CIRES, University of Colorado and NOAA/ETL, Campus Box 216, Boulder, CO 80309 United States
AU: * Fairall, C
EM: chris.fairall@noaa.gov
AF: NOAA Environmental Technology Laboratory, 325 Broadway, Boulder, CO 80305 United States
AU: Helmig, D
EM: detlev.helmig@colorado.edu
AF: INSTAAR, University of Colorado, Campus Box 450, Boulder, CO 80309 United States
AU: Ganzveld, L
EM: ganzevl@mpch-mainz.mpg.de
AF: Department of Atmospheric Chemistry, Max Planck Institute for Chemistry, Joh.-Joachim-Becher-Weg 27, Mainz, 55020 Germany
AB: A parameterization for the deposition velocity of an ocean-reactive atmospheric gas (such as ozone) is developed. The parameterization is based on integration of the turbulent-molecular transport equation (with a chemical source term) in the ocean. It extends previous work that only considered reactions within the oceanic molecular sublayer. The sensitivity of the ocean-side transport to reaction rate and wind forcing is examined. A more complicated case with a much more reactive thin surfactant layer is also considered. The full atmosphere-ocean deposition velocity is obtained by matching boundary conditions at the interface. For an assumed ocean reaction rate of 103 s-1, the enhancement for ozone deposition is found to be up to a factor of three for meteorological data obtained in a recent cruise off the East Coast of the US.
DE: 0312 Air/sea constituent fluxes (3339, 4504)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0368 Troposphere: constituent transport and chemistry
DE: 0466 Modeling
DE: 1635 Oceans (1616, 3305, 4215, 4513)
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005