A new method and a procedure for estimation of sea particle size distribution's (PSD) parameters from measurements of scattered light intensity ratios at certain angles are presented. The method is based on strong correlations found to exist between ratios of scattered light intensities measured at 30o and 70o and at 160o and 170o, and the shape parameters A and B of the Two-component PSD model (Risović 1993), respectively. These correlations have enabled derivation of simple formulas for calculation of -parameters of PSD from the measured scattered light intensities at said angles. In turn, the known (calculated) values of -parameters enable calculation of corresponding concentration parameters of PSD. The presented procedure enables simple retrieval of PSD (in the two component model formalism) from in-situ measurements of scattered light intensities at said angles. The method and the associated procedure are applicable to oceanic and coastal waters and could provide for a relatively cheap and simple sensor.

Fizika,Geoznanosti