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


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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Large River Plumes Detection by Satellite Altimetry Case Study of the Ob–Yenisei Plume

Remote Sensing, 2021. Dmitry Frey, and Alexander Osadchiev

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Water Exchange Between the Gulf of Ob and the Kara Sea During Ice-Free Seasons The Roles of River Discharge and Wind Forcing.pdf

Frontiers in Marine Science, 2021. Alexander Osadchiev, Olga Konovalova and Alexandra Gordey

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Microplastics distribution in the Eurasian Arctic is affected by Atlantic waters and Siberian rivers

Communications Earth & Environment, 2021. Evgeniy Yakushev, Anna Gebruk, Alexander Osadchiev, Svetlana Pakhomova, Amy Lusher , Anfisa Berezina, Bert van Bavel, Elena Vorozheikina, Denis Chernykh, Glafira Kolbasova, Ilia Razgon & Igor Semiletov

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Distribution of floating marine macro-litter in relation to oceanographic characteristics in the Russian Arctic Seas

Marine Pollution Bulletin, 2021. Maria Pogojeva, Igor Zhdanov, Anfisa Berezina, Artem Lapenkov, Denis Kosmach, Alexander Osadchiev, Georg Hanke, Igor Semiletov, Evgeniy Yakushev

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Hydrochemical Composition of the Runoff of Abkhazian Rivers and the Distinctive Features of Its Transformation in the Coastal Zon

Oceanology, 2021. A. A. Polukhin, A. D. Zagovenkova, P. V. Khlebopashev, V. M. Sergeeva, A. A. Osadchiev, and R. S. Dbar

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Hydrophysical Structure and Current Dynamics of the Kodor River Plume

Oceanology, 2021. A. A. Osadchiev,, A. A. Barymova, R. O. Sedakov, A. V. Rybin, A. G. Tanurkov, A. A. Krylov, V. V. Kremenetskiy, S. A. Mosharov, d, A. A. Polukhin, A. S. Ulyantsev, M. A. Osadchiev, and R. S. Dbar

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Structure and Variability of the Lena River Plume in the South-Eastern Part of the Laptev Sea

Oceanology, 2021. E. A. Spivaka, A. A. Osadchievb, and I. P. Semiletov

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Freshwater transport between the Kara, Laptev, and East‑Siberian seas

Scientific Reports, 2020. A. A. Osadchiev, M. N. Pisareva, E. A. Spivak, S. A. Shchuka, & I. P. Semiletov

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Spatial Structure, Short-temporal Variability, and Dynamical Features of Small River Plumes as Observed by Aerial Drones: Case Study of the Kodor and Bzyp River Plumes

Remote Sensing, 2020. Alexander Osadchiev, Alexandra Barymova, Roman Sedakov, Roman Zhiba and Roman Dbar

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Influence of estuarine tidal mixing on structure and spatial scales of large river plumes

Ocean Science, 2020. Alexander Osadchiev, Igor Medvedev, Sergey Shchuka1, Mikhail Kulikov1, Eduard Spivak, Maria Pisareva1, and Igor Semiletov

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Fate of river-borne floating litter during the flooding event in the northeastern part of the Black Sea in October 2018

Marine Pollution Bulletin, 2020. Evgeniya Korshenkoa, Victor Zhurbasb, Alexander Osadchievb, Pelagiya Belyakovac

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Water exchange between the Sea of Azov and the Black Sea through the Kerch Strait

Ocean Science, 2020. Ivan Zavialov, Alexander Osadchiev, Roman Sedakov, Bernard Barnier, Jean-Marc Molines, and Vladimir Belokopytov

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