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Alexander A. Polukhin

Alexander A. Polukhin
Shirshov Institute of Oceanology Russian Academy of Sciences · Marine Ecology

PhD

About

92
Publications
14,159
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280
Citations
Additional affiliations
March 2009 - present
P.P. Shirshov Institute of Oceanology
Position
  • Researcher
Education
November 2011 - May 2017

Publications

Publications (92)
Poster
Full-text available
Two Great Russian Rivers – Ob and Yenisei –give 56% (1350 km3 of fresh water per year) of continental flow to Siberian sector of the Arctic Ocean. This fresh water mass brings large amount of nutrients which are useful not only for phytoplankton but for scientists who wants to know how riverine and marine water mixes and what part plays this substa...
Article
Full-text available
Observations and predictions show that consequences of climate warming such as declining summer sea ice cover, melting glaciers, thawing permafrost, and increased river runoff to the Arctic Ocean will likely modify processes relevant to the freshwater and carbon budget, which in turn affect high-latitude marine ecosystems. There is a knowledge gap...
Article
Full-text available
A remarkable shift in the species composition and size distribution of the phytoplankton community have been observed in coastal waters along the Antarctic Peninsula over the last three decades. Smaller photoautotrophs such as cryptophytes are becoming more abundant and important for the regional ecosystems. In this study, flow cytometry was used t...
Article
Full-text available
Arctic meiofauna and nematodes were examined at 12 stations in the East Siberian Sea, covering a depth range of 13–59 m and an estuarine-shelf system from the Indigirka and Kolyma rivers to the adjacent shelf. Our data reveal the low diversity of the meiofauna at the East Siberian Sea shelf. The meiobenthos abundance was influenced by river run-off...
Article
Full-text available
The values and direction of carbon dioxide flux in the area of the continental slope in the north of the Kara Sea (St. Anna Trough) are calculated based on field studies in 2020 within the Siberian Arctic Sea Ecosystems program. The existence of a stable frontal zone in this area has been confirmed, which is formed by an alongslope current and limi...
Article
Full-text available
The Siberian Arctic is one of the regions, where the ongoing climate change is the most evident. There is limited knowledge available on the distribution of macrobenthic communities in the Siberian Arctic, their stability and functional structure. We used data from two latitudinal transects from the East Siberian Sea shelf to describe the distribut...
Book
В настоящем издании представлены научные результаты экспедиционных исследований 2016 и 2018 гг., выполненных в рамках многолетней программы «Экосистемы морей Сибирской Арктики». Основные цели исследований состояли в оценке структурных и функциональных характеристик экосистем в ключевых районах Карского моря и моря Лаптевых в условиях современных из...
Article
15.03.2021 г. После доработки 26.03.2021 г. Принята к публикации 08.04.2021 г. Пространственная и вертикальная изменчивость величины первичной продукции (ПП) и хлоро-филла "а" (Хл) была изучена во время 76-го рейса НИС "Академик Мстислав Келдыш" в Карское море с 7 июля по 1 августа 2019 г. В середине лета подповерхностный хлорофилльный максимум (ПХ...
Chapter
Two regions exist in the Bransfield Strait: the region of the Bransfield Strait along the South Shetland Islands with Transitional Zonal Water with Bellingshausen Sea influence and the region along the northeastern coast of the Antarctic Peninsula with colder and more saline Transitional Zonal Water with Weddell Sea influence. The narrow jet stream...
Chapter
Studies of the hydrochemical parameters of water in the northern part of the Weddell Sea were carried out in January and February 2020. The integral section from west to east of the study site shows spatial variability of the abiotic characteristics of the ecosystem: oxygen content, nutrients (dissolved phosphates, silicates, mineral forms of nitro...
Chapter
A strong front between cold and warm surface waters was found in the northwestern part of the Weddell Sea (Powell Basin) in February 2020. The front was manifested by sharp horizontal gradients of temperature, chemical, and optical properties. Differences in the concentrations and species of phytoplankton and zooplankton on both sides of the front...
Article
Full-text available
The article is dedicated to Pavel A. Stunzhas, a highly qualified specialist in the field of Marine Hydrochemistry, a graduate from the Moscow Institute of Physics and Technology. He was a Senior Researcher at the Laboratory of Biohydrochemistry at the Shirshov Institute of Oceanology Russian Academy of Sciences, PhD on Physics and Mathematics scie...
Article
Full-text available
On May 23, 2020, Pyotr Nikolaevich Makkaveev, one of the country‘s leading marine hydrochemists, head of the laboratory of biohydrochemistry at the Institute of Oceanology of the Russian Academy of Sciences, Doctor of Geography, suddenly passed away.
Article
Full-text available
Samples were collected in the area of the St. Anna Trough in the northern Kara Sea in September 2015 and July-August 2016. Based on salinity and temperature distribution, four areas have been distinguished: the shelf adjacent to the St. Anna Trough, the shelf edge, and the upper and lower parts of the continental slope. The variability of the struc...
Article
Full-text available
It is believed that the waters of rivers flowing into the Kara Sea (predominantly discharge of the Yenisei and Ob rivers) can propagate to the east, penetrating the Laptev Sea with the current along the coast. This can occur with the so-called eastern transfer of continental runoff. During a cruise of the R/V Akademik Mstislav Keldysh in 2018, trac...
Conference Paper
Full-text available
В публикации рассматриваются основные факторы, влияющие на процесс асидификации вод некоторых арктических морей России (Карском, Лаптевых, Восточно-Сибирское).
Article
Full-text available
On the materials of several SIO RAS cruises and archival hydrological and hydrochemical data, the dynamics of dissolved inorganic carbon in the Yenisey Gulf was investigated. There are 3 main areas, where mass sedimentation of suspended matter and oxidation of organic matter (OM) in the upper sediment layer takes place. The first region of oxidatio...
Poster
Full-text available
Svalbard itself performs a natural Arctic laboratory. Considering climate changes occurring in the Arctic region nowadays Svalbard can be used as a scientific ground for studying processes related to the whole Arctic. Thawing glaciers and permafrost, increasing runoff and mean annual air temperatures, sea-ice decrease, and other accompanying proces...
Article
Full-text available
This study aims to perform the results of the investigation of the Kara Sea carbonate system changes and the factors that determine it. The important feature of the Kara Sea water structure is strong stratification caused mainly by the Ob’ and Yenisey rivers discharge which is estimated as 81% of the total continental runoff to sea. Occurring clima...
Poster
Full-text available
: Shirshov Institute of Oceanology conducts investigations of the Kara Sea area since 1993. Nine large complex expeditions has been performed in the area until the nowadays. The main goal – studying of the Kara Sea ecosystem and revealing the major factors affecting its variability. It is well known that the Arctic region in the light of contempora...
Conference Paper
Full-text available
The Arctic region is undergoing major changes due to global climate change. Arctic ecosystems are highly susceptible to drastic changes in the conditions of their existence; therefore, under the influence of climate changes on the main factors determining the sustainability of ecosystem development, changes also occur in the ecosystems of the Arcti...
Article
The meiofauna was studied at 7 stations in the eastern part of the Kara Sea shelf and at the southern edge of the Voronin Trough. The total meiofaunal abundance was 682 ± 403 ind./10 cm2 and 10 major meiofaunal taxa were recorded for the eastern part of the Kara Sea. Canonical correspondence analysis indicated the depth, type of sediments and Corg...
Article
Full-text available
In a warming environment, permafrost thawing can play a significant role in the chemical composition of coastal waters in the Arctic region. It is a potential source of organic and inorganic forms of nutrients, as well as heavy metals and pollutants. To estimate the permafrost thawing influence on the chemical properties of the sea water, an experi...
Article
Phytoplankton community and its distribution were investigated in the south part of the Polar Front in the eastern Barents Sea in October 2014. Analysis of the spatial differences in the phytoplankton structure was performed in connection with changes of the temperature, salinity and biogenic regime. At the end of the growing season in the phytopla...
Presentation
Full-text available
In late August-September 2017 during the cruise of RV “Akademik Mstislav Keldysh” along the Eurasian coast there were conducted hydrochemical investigations of the Kara, Laptev and East-Siberian seas. The data including pH and alkalinity measurements as well as calculated carbonate system parameters (DIC, pCO2, ΩAr and ΩCa) allow tracing the differ...
Presentation
Full-text available
One of the main features of Eurasian Arctic Seas is the huge amount of fresh water coming from great Siberian rivers: Ob, Yenisei, Lena whose input is about 2000 km3/year into the Arctic Ocean basin. Depending on annual discharge and wind stress riverine water can either accumulate on the shelf or according to Carmack et al (2015) transformed river...
Article
Full-text available
In the paper performed results from observations of hydrochemical structure of estuarine are of the Lena River delta as well as in the central part of the shelf and above the continental slope of the Laptev Sea during 63d and 69th cruises of R/V “Academik Mstislav Keldysh” in September 2015 and 2017. Despite the large amount of freshwater input (es...
Article
Full-text available
Transects near the estuarine area of the Lena River were studied on cruises 63 and 69 of the R/V Akademik Mstislav Keldysh, organized by the Institute of Oceanology, Russian Academy of Sciences, in 2015 and 2017, the program of which included hydrochemical studies. Based on the results, the components of the carbonate system were calculated, and th...
Article
The decrease in Aral Sea area, which started in the 1960s, caused considerable changes in the hydrological, chemical, and biological structure of sea water. Regular observations of Aral water chemistry ceased in the early 1990s. There were no observations of the concentrations of biogenic element compounds in water (the so-called “first-day analyse...
Conference Paper
Full-text available
The goal of this work was to evaluate a potential influence of the melting glacier on the hydrochemistry of the surrounding coastal waters. The studies were based on 2 expeditions to the Tempelfjord (Western Spitzbergen) performed in winter 2014 and in summer 2015 when there were measured hydrophysical, chemical and biological parameters in the sea...
Article
The impacts of oceanic CO2 uptake and global warming on the surface ocean environment have received substantial attention, but few studies have focused on shelf bottom water, despite its importance as habitat for benthic organisms and demersal fisheries such as cod. We used a downscaling ocean biogeochemical model to project bottom water acidificat...
Article
Full-text available
This article focuses on the interaction between the Ob- and Yenisei-dominated parts of the large Ob-Yenisei buoyant plume formed in the southern part of the Kara Sea during ice-free periods. It was shown that certain wind forcing and river discharge conditions cause the formation of a specific structure of the Ob-Yenisei plume with significantly di...
Article
Full-text available
Studies have been performed on a transect along 130°30′ E from the Lena River delta (71°60′ N) to the continental slope and adjacent deepwater area (78°22′ N) of the Laptev Sea in September 2015. The structure of phytoplankton communities has distinct latitudinal zoning. The southern part of the shelf (southward of 73°10′ N), the most desalinated b...
Article
Full-text available
This paper considers different types of the continental runoff distribution over the Kara Sea depending on hydrological and meteorological processes based on 1993–2014 expedition data of the Shirshov Institute of Oceanology. The results of calculating the relative contribution of fresh water from several sources (the Ob and Yenisei rivers and melte...
Article
Full-text available
During cruise 65 of the R/V Akademik Mstislav Keldysh in the Kara Sea, three transects were executed: one eastwards from the Novaya Zemlya Archipelago and two in the St. Anna and Voronin troughs. It was noted that the continental runoff affected the entire surveyed aquatic area, even at the northern extremity of the Novaya Zemlya Archipelago. The t...
Article
Full-text available
The study of the Laptev Sea was a part of a comprehensive program for investigating Arctic seas during the cruise 63 of the R/V Akademik Mstislav Keldysh. On a transect along 130° E (September 8–14, 2015) from the estuary area of the Lena River on the traverse of the city of Tiksi to the continental slope (over 700 km), water samples were taken to...
Conference Paper
Full-text available
The goal of this work was to evaluate a potential influence of the melting glacier on the hydrochemistry of the surrounding coastal waters. The studies were based on 2 expeditions to the Tempelfjord (Western Spitzbergen) performed in winter 2014 and in summer 2015 when there were measured hydrophysical, chemical and biological parameters in the sea...
Article
Full-text available
Intensive transformation and sedimentation of suspended matter from riverine runoff occur in estuarine frontal zones. The mesozooplankton community plays an important role in these processes. In the Ob Estuary, the dominant copepods Limnocalanus macrurus and Senecella siberica form dense local aggregations, but only scarce data on the ecology of th...
Presentation
Full-text available
It is well–known that the Kara and Laptev seas are strongly affected by large amount of fresh water coming from the great Siberian rivers (the Ob’ River, the Yenisei River and the Lena River). Expeditions of the Shirshov Institute of Oceanology were directed on investigation of freshening of these two Arctic seas. We have large collection of data (...
Article
The phytoplankton community and its distribution were investigated in the eastern branch of the St. Anna Trough and over the adjacent Kara Sea shelf in September 2011 and in August 2014. The spatial and seasonal differences in the phytoplankton structure were analyzed in connection with ice melting and changes in the temperature, salinity, and biog...