HR: 1340h
AN: A23C-1459    [Abstracts]
TI: Coupling an ocean wave model with a global aerosol transport model: A sea salt aerosol parameterization perspective
AU: * Witek, M L
EM: mwit@igf.fuw.edu.pl
AF: University of Warsaw Institute of Geophysics, Pasteura 7, Warsaw, 02093, Poland
AU: Flatau, P J
EM: pflatau@ucsd.edu
AF: Scripps Institution of Oceanography, University of California, San Diego, 8602 La Jolla Shores Drive, La Jolla, CA 92037, United States
AU: Teixeira, J
EM: Teixeira@nurc.nato.int
AF: NATO Undersea Research Centre, Viale San Bartolomeo 400, La Specia, 19126, Italy
AU: Westphal, D L
EM: douglas.westphal@nrlmry.navy.mil
AF: Marine Meteorology Division, Naval Research Laboratory, Monterey, 7 Grace Hopper Avenue, Monterey, CA 93943, United States
AB: A new approach to sea salt parameterization is proposed which incorporates wind-wave characteristics into the sea salt emission function and can be employed globally and under swell-influenced conditions. The new source function was applied into Navy Aerosol Analysis and Prediction System model together with predictions from the global wave model Wave Watch III. The squared surface wind velocity U₁₀ and the wave's orbital velocity V_orb=πH_s/T_p are shown to be the key parameters in the proposed parameterization. Results of the model simulations are validated against multi-campaign shipboard measurements of the sea salt aerosol. The validations indicate a good correlation between V_orb and the measured surface concentrations. The model simulations with the new parameterization exhibit an improved agreement with the observations when compared to a wind-speed-only approach. The proposed emission parameterization has the potential to improve the simulations of sea salt emission in aerosol transport models.
DE: 0312 Air/sea constituent fluxes (3339, 4504)
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 1626 Global climate models (3337, 4928)
DE: 1846 Model calibration (3333)
DE: 3339 Ocean/atmosphere interactions (0312, 4504)
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting