Martynov O. Optical methods and instruments for rapid monitoring of chlorophyll content in the water of the Ocean

The features of the absorption spectrum of chlorophyll а is analyzed, and it is shown that the methods of spectrophotometry provide an integrated assessment of the phytoplankton content of the surface layers of the Ocean. It is noted that the fluorescence property of chlorophyll а gave possibility to detect the green pigment in the complex environment of other colored non-fluorescent admixtures. А possibility of the traditional optical measurements using а standardized two-beam photometer is proved. The standardized two-beam photometer schematic was developed. Based on this scheme а color index meter, comparisons photometer FS-6, multi-purpose spectrophotometer - instruments for monitoring of total content of admixtures of biological origin in the surface layer were created. The fluorimeter was designed for working into the shaft penetrating through the vessel. The description of а set of five hydrooptical instruments developed for underway measurements into the vessel shaft is made. The underway measurements significantly increased the amount of cruise information. To monitor the vertical distribution of admixtures of biological origin in the surface layer: the low cost attenuation and temperature meter was created; а method for measuring the volume scattering function is improved by means of periscope prism using, and а compact, high-speed polar nephelometer with metrological parameters superior to the world level was designed.