Spectral reflectance coefficient of Lake Teletskoye in august 2023 and its relationship with bio-optical characteristics

According to observations over the past 20 years, the oligotrophic Lake Teletskoye (Altai Republic) is undergoing gradual eutrophication, showing the necessity of regular monitoring of its ecological state. In August 2023, multiparametric hydrooptical studies were carried out on Lake Teletskoye, including measurements of the spectral water upwelling radiance reflectance and underwater irradiance, as well as sampling for laboratory determination of chlorophyll a concentration. In the main part of the lake, spectral maxima of reflectance coefficient were observed to be 0.7–1 %, while in estuary areas of Chulyshman, Kokshi, Kyga rivers where the influence of suspended matter is significant the reflectance reached 2.8 %. The performance of the semi-analytical biooptical algorithm for calculating the chlorophyll a concentration from the reflectance spectra, adapted to the conditions of inland waters, was tested. An overestimation of the calculation results compared to the measured chlorophyll a concentration was shown, however, a significant correlation was observed between them. In addition, the spectra of the light diffuse attenuation coefficient were calculated from both the reflectance spectra and underwater irradiance, showing good agreement. The main optically significant component of Lake Teletskoye water is nonliving organic matter, which is consistent with the data of direct laboratory determinations. The semi-analytical algorithm shows the possibilities of optical measurements for describing the ecological state of inland water bodies and can be the first step towards bio-optical satellite monitoring of Lake Teletskoye.

1. Selegey V.V., Selegey T.S. Lake Teletskoye. L.; 1978. 143 p. (in Russian).

2. Robertus Yu.V., Kivatskaya A.V., Lyubimov R.V. Ecological status of Lake Teletskoye’s water in the 21st century. Field Studies in the Altai Biosphere Reserve. 2021;3:182–189. doi:10.52245/26867109_2021_12_3_182 (in Russian).

3. Sutorikhin I.A., Kirillov V.V., Kolomeichev A.A., Litvinenko S.A. Relative transparency of the Teletskoye Lake water over a period from 2014 to 2023. Field Studies in the Altai Biosphere Reserve. 2024;6:168–172 (in Russian).

4. Sutorikhin I.A., Kolomeitsev A.A., Litvinenko S.A. Hydro-optical parameters of water in Lake Teletskoye during stable summer and winter temperature stratification. Fundamental and Applied Hydrophysics. 2020;13(2):35–42 (in Russian) https://doi.org/10.7868/S2073667320020045

5. Mitrofanova E.Y. Phytoplankton of Lake Teletskoye (Altai, Russia): features of development and long-term dynamics. Russian Journal of Ecology. 2018;49(2):180–185. doi:10.1134/S1067413618010101

6. Kirillova T.V. Pigment characteristics of phytoplankton of Lake Teletskoye: specialty 03.00.16: abstract of a dissertation for the degree of candidate of biological sciences. Krasnoyarsk, 2006. 24 p. (in Russian).

7. Kuderina T.M., Suslova S.B., Grabenko E.A. et al. The ecological situation of Teletskoe Lake to environmental changes. Field Studies in the Altai Biosphere Reserve. 2019;1:86–91 (in Russian).

8. Moiseeva N.A., Churilova T. Ya., Efimova T.V., Sutorikhin I.A., Kirillov V.V., Skorokhod E. Yu. Spectral bio-optical properties of Lake Teletskoye in summer. Proc. SPIE12780, 29th International Symposium on Atmospheric and Ocean Optics: Atmospheric Physics, 17 Oct 2023, 1278049. doi:10.1117/12.2690958

9. Remote Sensing of Ocean Color in Coastal, and Other Optically-Complex, Waters / Ed. by Sathyendranath S. Reports of the International Ocean­Color Coordinating Group. Dartmouth, Canada, 2000. 140 p.

10. Skorokhod E. Yu., Churilova T. Ya., Efimova T.V., Moiseeva N.A., Suslin V.V. Bio-Optical Characteristics of the Black Sea Coastal Waters near Sevastopol: Assessment of MODIS and VIIRS Products Accuracy. Physical Oceanography. 2021;28(2):215–227. doi:10.22449/1573-160X-2021-2-215-227

11. Molkov A.A., Fedorov S.V., Pelevin V.V., Korchemkina E.N. Regional Models for High-Resolution Retrieval of Chlorophyll a and TSM Concentrations in the Gorky Reservoir by Sentinel-2 Imagery. Remote Sensing. 2019;11(10):1215. doi:10.3390/rs11101215

12. Ansper A., Alikas K. Retrieval of Chlorophyll a from Sentinel-2 MSI Data for the European Union Water Framework Directive Reporting Purposes. Remote Sensing. 2019;11(1):64. doi:10.3390/rs11010064

13. Sutorikhin I.A., Frolenkov I.M., Litvinenko S.A., Soloviev V.A. Underwater spectral irradiance of freshwater reservoirs. Atmospheric and Oceanic Optics. 2023;36(10):861–865. doi:10.15372/AOO20231011 (in Russian).

14. Sutorikhin I.A., Krivobokov D.E., Soloviev V.A., Kamenev A.R. Method and device for measuring distribution of spectral solar illumination in photic layer of water bodies. Russian Federation Patent for Invention No. 2817043. State registration date April 09, 202415.

15. Gordon H.R. Physical Principles of Ocean Color Remote Sensing. University of Miami; 2019. 995 p. doi:10.33596/ppocrs-19

16. Lee M.E., Shybanov E.B., Korchemkina E.N., Martynov O.V., 2015. Determination of the Concentration of Seawater Components based on Upwelling Radiation Spectrum. Physical Oceanography. 2015;6:15–30. doi:10.22449/1573-160X-2015-6-15-30

17. Korchemkina E., Deryagin D., Pavlova M. et al. Advantage of Regional Algorithms for the Chlorophyll-a Concentration Retrieval from In Situ Optical Measurements in the Kara Sea. Journal of Marine Science and Engineering. 2022;10(11):1587. doi:10.3390/jmse10111587

18. Suslin V.V., Kudinov O.B., Korchemkina E.N., Latushkin A.A., Sutorikhin I.A., Kirillov V.V., Martynov O.V. Spectral properties of the vertical distribution of horizontal irradiance in Lake Teletskoye: August 2023. Atmospheric and Ocean Optics. Atmospheric Physics: Proceedings of the XXX International Symposium. July 1–5, 2024, St. Petersburg. URL: https://symp.iao.ru/files/symp/aoo/30/ru/abstr_16211.pdf (in Russian).

19. Lee M.E., Martynov O.V. Brightness coefficient sensor for subsatellite measurements of water bio-optical parameters. Ecological Safety of Coastal and Shelf Zones and Comprehensive Use of Shelf Resources. 2000:1:163–173 (in Russian).

20. Protocols for Satellite Ocean Colour Data Validation: In Situ Optical Radiometry / Ed. by Zibordi G., Voss K.J., Johnson B.C., Mueller J.L. IOCCG Ocean Optics and Biogeochemistry Protocols for Satellite Ocean Colour Sensor Validation, Volume 3.0, IOCCG, Dartmouth, NS, Canada. 2019. 67 p. doi:10.25607/OBP-691

21. GOST 17.1.4.02-90. Water. Methodology for spectrophotometric determination of chlorophyll a. IPC. Publishing House of Standards. Moscow. 12 p. (in Russian).

22. Morel A. Optical properties of pure water and pure sea water. In: Jerlov N.G., Nielson E.S. (eds.). Optical Aspects of Oceanography. New York: Academic Press; 1974. P. 1–24.

23. Smith R.C., Baker K.S. Optical properties of the clearest natural waters (200–800 nm). Applied Optics. 1981;20(2):177– 184. doi:10.1364/AO.20.000177

24. Kopelevich O.V. Light-scattering properties of sea water. In: Ocean Optics. Vol. 1. Physical optics of the ocean. Moscow: Nauka; 1983. P. 167–179 (in Russian).

25. Bricaud A., Babin M., Morel A., Claustre H. Variability in the chlorophyll-specific absorption coefficients of natural phytoplankton: Analysis and parametrization. Journal of Geophysical Research. 1995;100:13321–13332. doi:10.1029/95JC00463

26. Ylöstalo P., Kallio K., Seppälä J. Absorption properties of in-water constituents and their variation among various lake types in the boreal region. Remote Sensing of Environment. 2014;148:190–205. doi:10.1016/j.rse.2014.03.023

27. Ficek D., Meler J., Zapadka T., Ston-Egiert J. Modelling the light absorption coefficients of phytoplankton in Pomeranian lakes (northern Poland). Fundamental and Applied Hydrophysics. 2012;5(4):54–63.

28. Korchemkina E.N., Molkov A.A. Regional bio-optical algorithm for Gorky Reservoir: first results. Sovremennye Problemy Distantsionnogo Zondirovaniya Zemli iz Kosmosa. 2018;15(3):184–192. doi:10.21046/2070-7401-2018-15-3-184-192 (in Russian).

29. Ocean Optics / Ed. Monin А.S. М.: Nauka; 1983. 371 p. (in Russian).