Features of the vertical distribution of fluorescent dissolved organic matter from the photopic zone of the waters of the Black Sea

This paper discusses a laboratory, fluorimeter that has been. developed and proposes a technique for quantitatively estimating the fluorescence intensity of dissolved organic matter (FIDOM) that makes it possible, to carry out assay measurements and to, calibrate, the submersible fluorimeters that measure the FIDOM directly aboard ship. Combined profiles of the vertical distribution of the FIDOM, of the density of sea water (SW), and of the fluorescence of phytoplankton chlorophyll are obtained in the depth range 10-125 in in the Black Sea. It is proposed to use a submersible fluorimeter to determine the depth at which a density-discontinuity layer of SW occurs directly during vertical probing by the apparatus. (C) Optical Society of America.