Contents

Oceanology

Vol. 63, No. 4, 2023

Foreword

Multi-Disciplinary Ecosystem Studies in the Atlantic Sector of the Southern Ocean

p. 439  abstract

Marine Physics

Structure and Temporal Variability of the Northern Branch of the Antarctic Circumpolar Current in the Drake Passage

S. A. Ostroumova, I. D. Drozd and D. I. Frey p. 440  abstract

Spatial and Temporal Variability of the Thermohaline Structure of Waters in the Antarctic Sound

O. A. Zuev, D. I. Frey, I. D. Drozd and V. A. Krechik p. 453  abstract

Estimating Climate Trends of the Powell Basin’s Hydrophysical Characteristics

A. A. Bukatov, N. M. Solovei and E. A. Pavlenko p. 464  abstract

Hydrological Structure and Water Dynamics in the Powell Basin in January–February 2022

R. Z. Mukhametianov, A. M. Seliverstova, E. G. Morozov, D. I. Frey, V. A. Krechik and O. A. Zuev p. 472  abstract

Internal Waves near Half Moon Island, South Shetland Islands

O. S. Mekhova, D. A. Smirnova, E. G. Morozov, S. A. Ostroumova and D. I. Frey p. 486  abstract

Structure of Bottom Flows in Abyssal Channels of the Atlantic: Comparison of Autonomous and Vessel Observations in the Vema Channel, Romanche Fracture Zone, and Kane Gap

O. S. Mekhova, D. A. Smirnova and D. I. Frey p. 497  abstract

Marine Chemistry

Hydrological and Hydrochemical Structure of the Waters of the Bransfield Strait in January 2022

A. M. Seliverstova, O. A. Zuev, A. A. Polukhin, A. L. Chultsova, A.V. Masevich and R. Z. Mukhametianov p. 510  abstract

Marine Biology

Primary and Bacterial Production in the Bransfield Strait (Antarctica) in Summer

S. A. Mosharov, I. V. Mosharova, D. I. Frey, A. M. Seliverstova, A. A. Latushkin and S. V. Gontarev p. 523  abstract

Concentration and Fluorescence of Chlorophyl a in the Atlantic Sector of Antarctica

N. A. Moiseeva, T. Ya. Churilova, T. V. Efimova, E. Yu. Skorokhod, V. A. Artemiev and A. V. Iushmanova p. 536  abstract

A Regional Algorithm for Calculating the Thickness of the Photic Zone from the Vertical Profile of the Beam Attenuation Coefficient with a Case Study of the Northwestern Weddell Sea

A. A. Latushkin, P. A. Salyuk, V. V. Suslin and O. V. Martynov p. 545  abstract

Structure and Spatial Distribution of Mesozooplankton Communities in the Atlantic Sector of the Southern Ocean

V. V. Kasyan p. 550  abstract

Spatial Variability of Macro- and Mesozooplankton in the Bransfield Strait in January 2020

K. M. Gorbatenko and V. A. Yakovenko p. 559  abstract

Modeling of the Distribution and Relationship with Abiotic Environmental Factors of Juvenile and Adult Antarctic Krill Euphausia superba Based on Actual Hydrophysical Measurements

S. A. Murzina, V. P. Voronin, D. G. Bitiutskii and A. M. Orlov p. 568  abstract

Spatial Structure of Deep-Sea Pelagial Ichthyocenes in the Northern Weddell Sea (Powell Basin) and Brunsfield Strait in Summer 2020 and 2022

S. G. Kobyliansky, A. V. Mishin, A. M. Orlov, N. V. Gordeeva and R. Z. Mukhametyanov p. 574  abstract

Occurrence and Distribution of Fin Whales (Balaenoptera physalus) and Humpback Whales (Megaptera novaeangliae) in the Atlantic Sector of Antarctica

A. D. Chernetsky, P. V. Chukmasov, V. V. Krasnova, A. V. Tretiakov, L. G. Tretiakova, D. G. Bitiutskiy, S. A. Mosharov and P. A. Salyuk p. 589  abstract

Number of the Most Abundant Marine Mammals Species in the Vicinities of the Antarctic Peninsula, Scotia Sea, and Powell Basin

S. P. Kharitonov, A. V. Tretyakov, P. V. Chukmasov, A. D. Chernetsky, A. L. Mischenko, N. B. Konyukhov, A. E. Dmitriev, S. M. Artemyeva, G. Yu. Pilipenko, M. S. Mamaev, L. G. Tretyakova and V. V. Rozhnov p. 600  abstract