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


Wind-Driven Coastal Upwelling Near Large River Deltas in the Laptev and East-Siberian Seas

Remote Sensing, 2020. Alexander Osadchiev, Ksenia Silvestrova and Stanislav Myslenkov

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Bottom Sediments Reveal Inter- Annual Variability of Interaction between the Ob and Yenisei Plumes in the Kara Sea

Scientific Reports, 2019. A. A. Osadchiev, En. E. Asadulin, A. Yu. Miroshnikov, I. B. Zavialov, E. O. Dubinina & P. A. Belyakova

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Structure and Dynamics of Plumes Generated by Small Rivers

Estuaries and Coastal Zones, 2019. Alexander Osadchiev and Peter Zavialov

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Spreading dynamics of small river plumes off the northeastern coast of the Black Sea observed by Landsat 8 and Sentinel-2

Remote Sensing of Environment, 2019. Osadchiev A.A., Sedakov R.O.

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High resolution LiDAR measurements reveal fine internal structure and variability of sediment-carrying coastal plume

P.O. Zavialov, V.V. Pelevin, N.A. Belyaev, A.S. Izhitskiy, B.V. Konovalov, V.V. Krementskiy, I.V. Goncharenko, A.A. Osadchiev, D.M. Soloviev, C.A.E. Garcia, E.S. Pereira, L. Sartorato, O.O. Moller Jr.

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Small mountainous rivers generate high-frequency internal waves in coastal ocean

Scientific Reports, 2018. Osadchiev A.A.

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Small river plumes off the northeastern coast of the Black Sea under average climatic and flooding discharge conditions

Ocean Science, 2017. Alexander Osadchiev and Evgeniya Korshenko

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Structure of the buoyant plume formed by Ob and Yenisei river discharge in the southern part of the Kara Sea during summer and autumn

Journal of Geophysical Research: Oceans, 2017. A. A. Osadchiev, A. S. Izhitskiy, P. O. Zavialov, V. V. Kremenetskiy, A. A. Polukhin, V. V. Pelevin, and Z. M. Toktamysova

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Transport and bottom accumulation of fine river sediments under typhoon conditions and associated submarine landslides: case study of the Peinan River, Taiwan

Natural Hazards and Earth System Sciences, 2016. A. A. Osadchiev, K. A. Korotenko, P. O. Zavialov, W.-S. Chiang, and C.-C. Liu

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A method for quantifying freshwater discharge rates from satellite observations and Lagrangian numerical modeling of river plumes

Environmental Research Letters, 2015. A. A. Osadchiev

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Estimating the Deposition of RiverBorne Suspended Matter from the Joint Analysis of Suspension Concentration and Salinity

Oceanology, 2015. P. O. Zavialov, E. S. Barbanova, V. V. Pelevin, A. A. Osadchiev

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The Structure of Thermohaline and BioOptical Fields in the Surface Layer of the Kara Sea in September 2011

Oceanology, 2015. P. O. Zavialov, A. S. Izhitskiy, A. A. Osadchiev, V. V. Pelevin, and A. B. Grabovskiy

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Effects of bottom topography on dynamics of river discharges in tidal regions: case study of twin plumes in Taiwan Strait

Ocean Science, 2014. K. A. Korotenko, A. A. Osadchiev, P. O. Zavialov, R.-C. Kao, and C.-F. Ding

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Hydrophysical and Hydrochemical Characteristics of the Sea Areas Adjacent to the Estuaries of Small Rivers of the Russian Coast of the Black Sea

Oceanology, 2014. P. O. Zavialov, P. N. Makkaveev, B. V. Konovalov, A. A. Osadchiev, P. V. Khlebopashev, V. V. Pelevin A. B. Grabovskiy, A. S. Izhitskiy, I. V. Goncharenko, D. M. Soloviev, and A. A. Polukhin

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Synoptic Variability of Currents in the Coastal Waters of Sochi

Oceanology, 2014. O. A. Korotkina, P. O. Zavialov, A. A. Osadchiev

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