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Abstract <p>The study calculates the hue angles of the Black Sea and Sea of Azov water based on satellite and in situ measurements of the reflectance coefficient for 2019–2023. The correlation coefficient for the satellite and in situ hue angles is 0.92. Division of the reflectance spectra into subgroups according to the values of the hue angle is proposed for the study area. Satellite-derived values of absorption by dissolved organic matter (including detritus absorption) and backscattering by suspended particles have been compared in three ways: by empirical formulas for the hue angle, by a semianalytical algorithm for the spectral reflectance coefficient, and by the standard satellite algorithm (GIOP model). The empirical relationship is better at retrieving the absorption by dissolved organic matter than the standard satellite or semianalytical algorithms whereas for backscattering by suspended particles all three methods show similar quality of retrieving.</p>

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Calculation of Hue Angle and Inherent Optical Properties of Black Sea and Sea of Azov Water Based on Satellite Color Scanners Data

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • E. N. Korchemkina,
  • E. V. Mankovskaya

摘要

Abstract

The study calculates the hue angles of the Black Sea and Sea of Azov water based on satellite and in situ measurements of the reflectance coefficient for 2019–2023. The correlation coefficient for the satellite and in situ hue angles is 0.92. Division of the reflectance spectra into subgroups according to the values of the hue angle is proposed for the study area. Satellite-derived values of absorption by dissolved organic matter (including detritus absorption) and backscattering by suspended particles have been compared in three ways: by empirical formulas for the hue angle, by a semianalytical algorithm for the spectral reflectance coefficient, and by the standard satellite algorithm (GIOP model). The empirical relationship is better at retrieving the absorption by dissolved organic matter than the standard satellite or semianalytical algorithms whereas for backscattering by suspended particles all three methods show similar quality of retrieving.