Acknowledgements

The authors are grateful to many colleagues from Shirshov Institute of Oceanology for valuable support during the field surveys. This research was funded by the Russian Foundation for Basic Research, research project 18-05-80049 (collecting and processing of in situ data), the Russian Ministry of Science and Higher Education, research project 14.W03.31.0006 (collecting and processing of satellite data), and the Russian Science Foundation, research project 18-17-00156 (study of river plumes).
