Abstract
A method for inferring the spatial distribution of sea-salt emission flux in surf zone from the volume-size concentrations of sea-salt particles observed near at sea shore is discussed. This method applies the boundary integration method (the collocation method) on the transport and diffusion equation for sea-salt particles. Two approximate influence functions are introduced, of which main difference is concerned with whether including the horizontal eddy diffusion effect. The estimation of the spatial distributions of sea-salt flux from the observed volume-size concentrations is generally an ill- posed inverse problem, so that the following disposals are necessary; (1) reducing the sensitivity of an estimation to data error by use of the multi reference data at the multi levels of height lower than 15m from surface, (2) assimilating the reference data to those computed by the model equations within an allowable limitation. The locations of effective flux sources and a tendency of time variation of flux strength inferred from the reference volume-size concentrations approximately coincide with those estimated by the wave simulation (SWAN).
