Water-side turbulence enhancement of ozone deposition to the ocean C. W. Fairall1, D. Helmig2, L. Ganzeveld3, and J. Hare4,* 1NOAA Earth Science Research Laboratory, Boulder, CO, USA 2INSTAAR, University of Colorado, Boulder, CO, USA 3Max-Planck Institute for Chemistry, Mainz, Germany 4CIRES, University of Colorado, Boulder, CO, USA *now at: SOLAS International Project Office, University of East Anglia, Norwich, UK
Abstract. 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 by
oceanic turbulence is found to be up to a factor of three for meteorological
data obtained in a recent cruise off the East Coast of the U.S.
Citation: Fairall, C. W., Helmig, D., Ganzeveld, L., and Hare, J.: Water-side turbulence enhancement of ozone deposition to the ocean, Atmos. Chem. Phys., 7, 443-451, doi:10.5194/acp-7-443-2007, 2007.