14th Conference on Interaction of the Sea and Atmosphere
Eighth Conference on Atmospheric Chemistry
AMS Forum: Managing our Physical and Natural Resources: Successes and Challenges


Water-side Turbulence Enhancement of Ozone Deposition to the Ocean

C. W. Fairall, NOAA/ETL, Boulder, CO; and D. Helmig, J. E. Hare, and L. Ganzveld

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.

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Joint Session 6, Air-Sea Exchange of Trace Gases (Joint between the 14th Conference on Interaction of the Sea and Atmosphere, the 8th Conference on Atmospheric Chemistry, and the AMS Forum on Managing our Physical and Natural Resources: Success and Challenges)
Wednesday, 1 February 2006, 4:00 PM-5:30 PM, A309

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