Geophysical Research Letters
  • Open Access

A wave roughness Reynolds number parameterization of the sea spray source flux

Authors

  • Sarah J. Norris,

    Corresponding author
    1. Institute of Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, UK
    • Corresponding author: S. J. Norris, Institute of Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Woodhouse Lane, Leeds LS2 9JT, UK. (snorris@env.leeds.ac.uk)

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  • Ian M. Brooks,

    1. Institute of Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, UK
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  • Dominic J. Salisbury

    1. Institute of Climate and Atmospheric Science, School of Earth and Environment, University of Leeds, Leeds, UK
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Abstract

[1] Parameterizations of the sea spray aerosol source flux are derived as functions of wave roughness Reynolds numbers, RHa and RHw, for particles with radii between 0.176 and 6.61 µm at 80% relative humidity. These source functions account for up to twice the variance in the observations than does wind speed alone. This is the first such direct demonstration of the impact of wave state on the variability of sea spray aerosol production. Global European Centre for Medium-Range Weather Forecasts operational mode fields are used to drive the parameterizations. The source flux from the RH parameterizations varies from approximately 0.1 to 3 (RHa) and 5 (RHw) times that from a wind speed parameterization, derived from the same measurements, where the wave state is substantially underdeveloped or overdeveloped, respectively, compared to the equilibrium wave state at the local wind speed.

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