Research of the Relationship between Salinity and Yellow Substance Fluorescence in the Kara Sea

The results of studies of the dissolved organic matter fluorescence intensity and salinity correlation in the surface layer of the Kara Sea are shown. The studies were carried out using a flow-through system during the cruises of the “Professor Shtokman” and “Akademik Mstislav Keldysh” research vessels (2013—2015). To study the spatial variability of the correlation of colored dissolved organic matter fluorescence and salinity, the method of “sliding correlations” proposed by the authors is used. A strong anticorrelation was recorded in the area of waters affected by river runoff. A positive correlation was recorded in the region of the prevailing effect of the melted glacial waters. In the areas of comparable influence of these factors, as well as outside the desalination zone, no correlation is observed. The interannual variability of the investigated correlation is recorded. The boundaries of the area affected by river runoff are determined from the satellite ocean color data of the MODIS instrument, processed using a regional algorithm for the Kara Sea. Strong anticorrelation in this region, observed over a wide range of salinity, allows the use of satellite maps of the yellow substance absorption spatial distribution to determine the boundaries position of the surface desalinated layer, to study its structure and dynamics.

1. Zatsepin A. G., Zavialov P. O., Kremenetskiy V. V., Poyarkov S. G., Soloviev D. M. The upper desalinated layer in the Kara Sea. Oceanology. 2010, 50(5), 657—667.

2. Kubryakov A., Stanichny S., Zatsepin A. River plume dynamics in the Kara Sea from altimetry-based lagrangian model, satellite salinity and chlorophyll data. Remote Sensing of Environment. 2016, 176, 177—187.

3. Burenkov V. I., Goldin Y. A., Artem’ev V. A., Sheberstov S. V. Optical characteristics of the Kara Sea derived from shipborne and satellite data. Oceanology. 2010, 50(5), 675—687.

4. Polukhin A. A., Makkaveev P. N. Features of the continental runoff distribution over the Kara Sea. Oceanology. 2017, 57(1), 19—30.

5. Drozdova A. N., Patsaeva S. V., Khundzhua D. A. Fluorescence of dissolved organic matter as a marker for distribution of desalinated waters in the Kara Sea and bays of Novaya Zemlya archipelago. Oceanology. 2017, 57(1), 41—47.

6. Amon R. M. W. The role of dissolved organic matter for the organic carbon cycle in the Arctic Ocean. The Organic Carbon Cycle in the Arctic Ocean. Springer, Berlin, Heidelberg, 2004, 83—99.

7. Glukhovets D. I., Goldin Y. A. Study of bio-optical characteristics of waters of the Kara Sea by using data of satellite and ship measurements. Current Problems in Remote Sensing of the Earth from Space. 2014, 11(4), 346—350 (in Russian).

8. Goldin Y. A., Glukhovets D. I., Shatravin A. V. Spatial distribution of the seawater fluorescent properties of the Kara sea in 2013—2014. Proceedings of VIII international conference “Current problems in optics of natural waters”, Saint Petersburg, 2015, 12—21, (in Russian).

9. Goldin Y. A., Shatravin A. V., Levchenko V. A., Ventskut Y. I., Gureev B. A., Kopelevich O. V. Analysis of spatial variability of fluorescent intensity of seawater in western part of the Black Sea. Fundamentalnaya i Prikladnaya Gidrofizika. 2015, 7(1), 11—20, (in Russian).

10. Vazyulya S. V., Kopelevich O. V., Sheberstov S. V., Artemiev V. A. Satellite estimation of the coefficients of CDOM absorption and diffuse attenuation in the White and Kara seas. Current Problems in Remote Sensing of the Earth from Space. 2014, 11(4), 31—41 (in Russian).

11. Sheberstov S. V., Lukyanova E. A. A system for acquisition, processing, and storage of satellite and field biooptical data. Proceedings of IV international conference “Current problems in optics of natural waters”, Nizhny Novgorod, 2007, 179—183.

12. Glukhovets D. I., Goldin Y. A. Study of the influence of continental runoff on the surface layer of the Kara Sea near the coast of Novaya Zemlya using high-resolution ship and satellite data. Current Problems in Remote Sensing of the Earth from Space. Digital abstracts of the Fifteenth All-Russian Open Conference, 2017, 241 (in Russian).

13. Artemiev V. A., Glukhovets D. I., Shatravin A. V. Optical properties of waters of the Novaya Zemlya east coast bays. Proceedings of IX international conference “Current problems in optics of natural waters”, Saint Petersburg, 2017, 70—74 (in Russian).