Alexander Osadchiev

Alexander Osadchiev
Senior scientist
osadchiev@ocean.ru

Alexander Osadchiev

Education:

2009 M.Sc. in Mathematics, Moscow State University, Russia
2014 Ph.D. in Mathematics and Physics, Shirshov Oceanology Institute, Russia

Research interests:

Alexander research is focused on land-ocean interactions with special emphasis on river plumes and associated transport of terrigenous material, nutrients, and pollutants. My principal goal is to improve our understanding of the underlying dynamics of these processes and their influence on coastal ecosystems. My research is based on statistical analysis of in situ and satellite data as well as numerical modeling using Lagrangian and Eulerian ocean models

On June 15, 2021, A.A. Osadchiev for the degree of Doctor of Physical and Mathematical Sciences. The topic of the dissertation is "Structure, dynamics and variability of river plumes". The dissertation is a generalization of many years of research on river plumes carried out by A.A. Osadchiev in various regions of the World Ocean: in the Black Sea, in the seas of the Russian Arctic, in the seas of East Asia. The significance of studies of river plumes carried out by A.A. Osadchiev, is determined by their significant contribution to understanding the interaction of the ocean with land waters, which affects many physical, biological and geochemical processes in the coastal and shelf zones of the sea. River plumes, being a transitional water mass between river runoff and sea waters, provide the transformation and redistribution of global flows of matter between land and the World Ocean. A.A. Osadchiev was the first to create a specialized theory of the formation, propagation and mixing of small river plumes, which account for about 25% of the volume of fresh water and 40% of the volume of terrigenous suspension entering the World Ocean from land. In addition, A.A. Osadchiev carried out comprehensive studies of large-scale transport and transformation of freshwater runoff in the Russian sector of the Arctic, which plays a key role in the variability of the ice cover and regional albedo, which affects climate processes on a global scale.

Based on the materials of the doctoral dissertation of A.A. Osadchiev in December 2021, the Scientific World publishing house published the monograph River Plumes. This monograph became, in fact, the first book in Russian, in which the processes of propagation and transformation of river runoff into the sea and its influence on hydrophysical processes in the coastal and shelf zones are described consistently and in detail.



  Science articles


Decomposition of Estuarine Circulation and Residual Stratification under Landfast Sea Ice

Journal of Physical Oceanography, 2023. Hans Burchard , Karsten Bolding, Xaver Lange, and Alexander Osadchiev

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Biogeochemical structure of the Laptev Sea in 2015-2020 associated with the River Lena plume

Frontiers in Marine Science, 2023. Lina Xie, Evgeniy Yakushev, Igor Semiletov, Andrey Grinko, Ivan Gangnus, Anfisa Berezina, Alexander Osadchiev, Igor Zhdanov, Alexander Polukhin, Julia Moiseeva, Darya Purgina, Irina Pipko, Svetlana Pugach3, Oleg Dudarev and Zhenming Ge

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Austral summer circulation in the Bransfield Strait based on SADCP measurements and satellite altimetry

Frontiers in Marine Science, 2023. Dmitry Frey, Viktor Krechik, Alexandra Gordey, Sergey Gladyshev, Dmitry Churin, Ilya Drozd1, Alexander Osadchiev, Sergey Kashin, Eugene Morozov and Daria Smirnova

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Large chocked lagoon as a barrier for river–sea flux of dissolved pollutants: Case study of the Azov Sea and the Black Sea

Marine Pollution Bulletin, 2023. Roman Sedakov, Alexander Osadchiev, Bernard Barnier, Jean-Marc Molines, Pedro Colombo

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Study of Marine Particles Using Submersible Digital Holographic Camera during the Arctic Expedition

Applied Sciences, 2022. Victor Dyomin, Igor Semiletov, Denis Chernykh, Elena Chertoprud, Alexandra Davydova, Nikolay Kirillov, Olga Konovalova, Alexey Olshukov, Aleksandr Osadchiev and Igor Polovtsev

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Structure and Circulation of Atlantic Water Masses in the St. Anna Trough in the Kara Sea

Frontiers in Marine Science, 2022. Alexander Osadchiev, Kirill Viting, Dmitry Frey, Darya Demeshko, Alina Dzhamalova, Alina Nurlibaeva, Alexandra Gordey, Victor Krechik, Eduard Spivak, Igor Semiletov and Natalia Stepanova

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Production of Fluorescent Dissolved Organic Matter by Microalgae Strains from the Ob and Yenisei Gulfs (Siberia)

Plants, 2022. Nikolay V. Lobus, Anton M. Glushchenko, Alexander A. Osadchiev, Yevhen I. Maltsev, Dmitry A. Kapustin, Olga P. Konovalova, Maxim S. Kulikovskiy, Ivan N. Krylov and Anastasia N. Drozdova

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Spreading and accumulation of river-borne sediments in the coastal ocean after the environmental disaster at the Doce River in Brazil

Ocean and Coastal Research, 2022. Angelo T. Lemos, Alexander Osadchiev, Piero L. F. Mazzini , Guilherme N. Mill , Sabrina A. R. Fonseca , Renato D. Ghisolfi

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Mesoscale Eddies in the Black Sea and Their Impact on River Plumes: Numerical Modeling and Satellite Observations

Remote Sensing, 2022. Konstantin Korotenko, Alexander Osadchiev and Vasiliy Melnikov

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Lateral Border of a Small River Plume: Salinity Structure, Instabilities and Mass Transport

Remote Sensing, 2022. Alexander Osadchiev, Alexandra Gordey, Alexandra Barymova, Roman Sedakov, Vladimir Rogozhin, Roman Zhiba and Roman Dbar

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Editorial. River plumes and estuaries

Frontiers in Marine Science, 2022. Alexander Osadchiev and Alexander Yankovsky

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Decomposition of Estuarine Circulation and Residual Stratification under Landfast Sea Ice

Journal of Physical Oceanography, 2022. Hans Burchard, Karsten Bolding, Xaver Lange, and Alexander Osadchiev

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Structure of the freshened surface layer in the Laptev and East-Siberian seas during ice-free periods

Frontiers in Marine Science, 2021. Alexander Osadchiev, Dmitry Frey, Eduard Spivak, Sergey Shchuka,Natalia Tilinina1 and Igor Semiletov

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Structure of the freshened surface layer in the Kara Sea during ice-free periods

Journal of Geophysical Research: Oceans, 2021. A. A. Osadchiev, D. I. Frey, S. A. Shchuka, N. D. Tilinina, E. G. Morozov, and P. O. Zavialov

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Internal waves as a source of concentric rings within small river plumes

Remote Sensing, 2021. Alexander Osadchiev , Roman Sedakov, Alexandra Gordey and Alexandra Barymova

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