The Black Sea IOPs based on SeaWiFS data

Abstract

In this study, a regional algorithm for retrieving Inherent Optical Properties (IOPs) has been developed for the Black Sea using remote sensing reflectance at five wavelengths in the visible spectral range corresponding to the Sea-viewing Wide Field of View Sensor (SeaWiFS). The model retrieves a spectral signature of particle backscattering coefficient at 555 nm, b bp (λ), and its spectral slope, n p , total absorption coefficient of colored detrital matter (sum of colored dissolved matter and non-algal particles, CDM) at 490 nm, a CDM (λ), spectral slope of CDM absorption coefficient, S, and chlorophyll a concentration, C a . These satellite derived set of IOPs and bio-optical properties measured in situ in the western open Black Sea within period 1998-1999 have been analyzed. The result reveals four specific cases corresponding to 1) variation of spectral slope of CDM absorption coefficient, 2) coccolithophores blooms, 3) domination of micro-celled phytoplankton (diatoms and/or dinoflagellates) and 4) presences of the picoplankton in phytoplankton community. Examples of the spatial distribution and seasonal variability of the retrieved parameters in half-monthly composite maps are presented. A complete set of these maps for SeaWiFS lifetime is available on http://blackseacolor.com/.