CONSIDERING OF BIOOPTICAL CHARACTERISTICS STRATIFICATION FOR LIGHT FIELDS CALCULATION IN TYPE I WATERS

  • A. V. Yushmanova Shirshov Institute of Oceanology, Russian Academy of Sciences; Moscow Institute of Physics and Technology
  • D. N. Deryagin Shirshov Institute of Oceanology, Russian Academy of Sciences; Moscow Institute of Physics and Technology
  • D. I. Glukhovets Shirshov Institute of Oceanology, Russian Academy of Sciences; Moscow Institute of Physics and Technology
DOI 10.29006/1564-2291.JOR-2022.50(1).4
Keywords spectral absorption coefficient, beam attenuation coefficient, photosynthetically active radiation, Arctic, chlorophyll а concentration

Abstract

A method for calculating the vertical profiles of the spectral absorption coefficient of suspended particles is presented, taking into account the stratification of the seawater extinction coefficient the surface layer. The method was developed on the basis of data obtained in 84-th cruise of the R/V “Akademik Mstislav Keldysh” in the Arctic Ocean (“European Arctic 2021”, July 24 – August 26, 2021). The calculated profiles were used to estimate the vertical distribution of the concentration of chlorophyll a and further numerical simulation of the downwelling flux of photosynthetically active radiation. Comparison of the calculated light fields parameters with the results of in situ determinations showed good agreement (the root-mean-square error between the measured and calculated PAR values is 8 %).

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Published
2022-04-28
Issue
Vol 50 No 1 (2022): Journal of Oceanological Research
Section
Ocean physics and climate

Transfer of copyrights occurs on the basis of a license agreement between the Author and Shirshov Institute of Oceanology, RAS