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Proceedings of SPIE - The International Society for Optical Engineering

ISSN:0277786X

2020

Artemiev, V.A.¹

Salyuk, P.A.¹

10.1117/12.2575466I

The paper presents a joint analysis of direct measurements of bio-optical, hydro-optical and hydrodynamic characteristics performed on a section through the Lomonosov equatorial undercurrent in December 2019 along 26 degrees of west longitude. The vertical structure of the temperature and salinity of seawater, the speed and direction of the currents, the concentration of chlorophyll-a and the fluorescence of dissolved organic matter (DOM), and light beam attenuation coefficient at 525 and 625 nm were analyzed. The obtained sections show a low content of the main optically active components of seawater. The maximum values of all the analyzed optical parameters were recorded on a pycnocline at depths of 60-80 meters, where phytoplankton cells develop, which mainly determine the variability of the optical characteristics of the region.

Chlorophyll-a, Dissolved organic matter, Fluorescence, Light beam attenuation coefficient, Lomonosov equatorial undercurrent, Salinity, Temperature

2020-12-30 13:43:06