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\begin{document}

\title{Bio-optical properties of the Barents and Norwegian seas surface layer
in summer 2017}



\author[1]{Dmitry Glukhovets}%
\affil[1]{Shirshov Institute of Oceanology, Russian Academy of Sciences}%


\vspace{-1em}



  
  \date{June 14, 2024}


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\begin{abstract}
A comparative study of the surface layer bio-optical properties of the
Barents and Norwegian Seas in the summer of 2017 is carried out. Ship
data were obtained during the 68th cruise of the R/V `Akademik Mstislav
Keldysh' (June-August 2017). Using a flow-through system, the
fluorescence intensities of chlorophyll `a' and dissolved organic
matter, salinity and temperature of the water surface layer along the
ship's route were continuously recorded. At the sampling stations, the
reflectance spectra were measured. Samples were taken for spectral
fluorescence and absorbance measurements performed with a laser
spectrometer and an integrating cavity absorption meter. The results are
compared with the data of direct determinations of the chlorophyll
concentration. In the Barents Sea, the results of shipboard measurements
are compared with the data of OLCI satellite scanner. Frequent
continuous cloudiness prevented the use of ocean color data for the
Norwegian Sea. A comparative study of the fluorescence, absorption, and
reflectance spectra has shown the possibility of carrying out a rapid
assessment of the phytoplankton species composition and its
concentration. In particular, these data made it possible to detect the
coccolithophore bloom in the Barents Sea. The change in the coefficients
of the regression equation of chlorophyll fluorescence intensity and its
concentration, determined by direct methods for different regions, is
shown.%
\end{abstract}%



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