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 Ob-Yenisei plume in the Kara Sea shortly before autumn ice formation

Frontiers in Marine Science, 2023. Alexander Osadchiev, Zinaida Zabudkina, Vladimir Rogozhin, Dmitry Frey, Alexandra Gordey, Eduard Spivak, Anatoly Salyuk, Igor Semiletov and Roman Sedakov

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Satellite-Based Evaluation of Submarine Permafrost Erosion at Shallow Offshore Areas in the Laptev Sea

Remote Sensing, 2023. Alexander Osadchiev, Polina Adamovskaya, Stanislav Myslenkov, Oleg Dudarev and Igor Semiletov

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Intense zonal freshwater transport in the Eurasian Arctic during ice‑covered season revealed by in situ measurements

Scientific Reports, 2023. Alexander Osadchiev, Roman Sedakov, Dmitry Frey, Alexandra Gordey, Vladimir Rogozhin, Zinaida Zabudkina, Eduard Spivak, Ekaterina Kuskova, Andrey Sazhin & Igor Semiletov

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Influence of the Coriolis Force on Spreading of River Plumes

Remote Sensing, 2023. Alexander Osadchiev, Ivan Alfimenkov and Vladimir Rogozhin

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The Finding of Pogonophorans (Annelida, Siboglinidae) in the St. Anna Trough (Kara Sea) in an Area of Gas Hydrate Dissociation

Доклады и тезисы, 2023. N. N. Rimskaya-Korsakova, N. P. Karaseva, A. A. Osadchiev, I. P. Semiletov, M. M. Gantsevich, D. A. Yurikova, and Academician V. V. Malakhov

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Synoptic and Seasonal Variability of Small River Plumes in the Northeastern Part of the Black Sea

Water MDPI, 2023. Evgeniya Korshenko, Irina Panasenkova, Alexander Osadchiev, Pelagiya Belyakova and Vladimir Fomin

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Surface microplastics in the Kara Sea: from the Kara Gate to the 83°N

Frontiers in Marine Science, 2023. Anfisa Berezina, Svetlana Pakhomova, Igor Zhdanov, Olga Mekhova, Tatiana Polivanova, Matvei Novikov, Maria Pogojeva, Alexander Osadchiev, Natalia Stepanova and Evgeniy Yakushev

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Structure and variability of the Pechora plume in the southeastern part of the Barents Sea

Frontiers in Marine Science, 2023. Vladimir Rogozhin, Alexander Osadchiev, and Olga Konovalova

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SMAP Sea Surface Salinity Improvement in the Arctic Region Using Machine Learning Approaches

Machine Learning In Natural Sciences, 2023. A. S. Savin, M.A.Krinitskiy, and A. A. Osadchiev

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Riverine Litter Flux to the Northeastern Part of the Black Sea

Journal of Marine Science and Engineering, 2023. Maria Pogojeva, Evgeniya Korshenko and Alexander Osadchiev

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Nitrous Oxide Dynamics in the Siberian Arctic Ocean and Vulnerability to Climate Change

JGR Biogeosciences, 2023. Birgit Wild, Nicholas E. Ray, Céline Lett, Amelia Jane Davies, Elena Kirillova, Henry Holmstrand, Elizaveta Klevantceva, Alexander Osadchiev, Ivan Gangnus, Evgeniy Yakushev, Denis Kosmach, Oleg Dudarev, Örjan Gustafsson, Igor Semiletov, and Volker Brüchert

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Multi-Sensor Observations Reveal Large-Amplitude Nonlinear InternalWaves in the Kara Gates, Arctic Ocean

Remote Sensing, 2023. Igor E. Kozlov, Ilya O. Kopyshov, Dmitry I. Frey, Eugene G. Morozov, Igor P. Medvedev, Arina I. Shiryborova, Ksenya P. Silvestrova, Aleksandr V. Gavrikov, Elizaveta A. Ezhova, Dmitry M. Soloviev, Evgeny V. Plotnikov, Vladislav R. Zhuk, Pavel V. Gaisky, Alexander A. Osadchiev and Natalia B. Stepanova

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Mesoscale Eddy Chain Structures in the Black Sea and Their Interaction with River Plumes: Numerical Modeling and Satellite Observations

Remote Sensing, 2023. Konstantin Korotenko, Alexander Osadchiev, and Vasiliy Melnikov

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In situ bottom sediment temperatures in the Siberian arctic seas: Current state of subsea permafrost in the kara sea vs laptev and east Siberian seas

Marine and Petroleum Geology, 2023. B. Bukhanov, E. Chuvilin, M. Zhmaev, N. Shakhova, E. Spivak, O. Dudarev, A. Osadchiev, M. Spasennykh, I. Semiletov

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Findings of Pogonophores (Annelida and Siboglinidae) in the Kara Sea Associated with the Regions of Dissociation of Seafloor and Cryogenic Gas Hydrates

Russian Journal of Marine Biology, 2023. V. V. Malakhov, N. N. Rimskaya-Korsakova, A. A. Osadchiev, I. P. Semiletov, N. P. Karaseva, and M. M. Gantsevich

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