Content of cesium radionuclides in water and bottom sediments of the Barents sea

2021 ◽  
pp. 548-553
Author(s):  
A.A. Paraskiv ◽  
◽  
N.Yu. Mirzoeva ◽  
O.N. Miroshnichenko ◽  
◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Surface Waters ◽  
Barents Sea ◽  
Field Research ◽  
Comparative Assessment ◽  
The Barents Sea ◽  
Cesium Radionuclides ◽  
Potential Sources

Based on the results of field research in the cruise 68 of the RV Akademik Mstislav Keldysh, the content of anthropogenic 137Cs radionuclides in surface waters and bottom sediments of the Barents Sea was estimated. As a result of a comparative assessment of current levels of radiocesium in other seas, it is concluded that the radioecological situation in the Barents Sea is favorable, despite the presence of a large number of potential sources of radiation pollution.

Features of Bitumoid Distribution in Bottom Sediments of the Barents Sea

Oceanology ◽  
2020 ◽  
Vol 60 (6) ◽  
pp. 831-839
Author(s):  
Yu. S. Glyaznetsova ◽  
I. A. Nemirovskaya
Keyword(s):  
Bottom Sediments ◽  
Barents Sea ◽  
The Barents Sea

Evaluation of the modern geoecological state of the fjords of the eastern Barents sea

2021 ◽  
pp. 899-943
Author(s):  
V.A. Shakhverdov ◽  
◽  
D.V. Ryabchuk ◽  
M.A. Spiridonov ◽  
V.A. Zhamoida ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Industrial Development ◽  
Barents Sea ◽  
Chemical Elements ◽  
Environmental Damage ◽  
North West ◽  
Geochemical Zoning ◽  
The North ◽  
The Barents Sea ◽  
Main Components

A brief analysis of the history of environmental geological study of the Barents Sea is given. It shows that at the beginning of industrial development the geological environment was characterized by a low level of disturbance and pollution. On example of the Kola Bay, an assessment of the current environmental geological conditions of the fjords in the eastern part of the Barents Sea is given. Seismic-acoustic studies confirm the predominantly tectonic origin of the bay and the hazardous spread of gravitational rocks movement within the coastal slopes. The background geochemical characteristics of recent bottom sediments are quantified. It is shown that geochemical zoning of the bottom of the bay is a consequence of both natural and anthropogenic processes. According to the content of Cu, Zn, As, Cd, Pb, Hg and hexane-soluble petroleum products (PP) in the bottom sediments, the characteristics of various areas were obtained. It is shown that the distribution of PP and several other pollutants in the main components of aquatic and coastal geosystems is a leading element of the environmental monitoring system, quantitative assessment of anthropogenic impact and accumulated environmental damage. Active economic activity within the southern leg of the Kola Bay, as well as the naval bases, significantly affects the distribution of chemical elements. The data concerning distribution of chemical elements forms in bottom sediments are given that suggest a high probability of secondary pollution of the bottom water when the physicochemical conditions of sedimentation processes change. A comparative analysis showed that bottom sediments of the Kola Bay are characterized by the highest concentration of chemical elements in the North-West Region of the Russian Federation.

Palynological evidence of sea-surface conditions in the Barents Sea off northeast Svalbard during the postglacial period

2020 ◽  
pp. 1-15
Author(s):  
Camille Brice ◽  
Anne de Vernal ◽  
Elena Ivanova ◽  
Simon van Bellen ◽  
Nicolas Van Nieuwenhove
Keyword(s):  
Sea Ice ◽  
Surface Waters ◽  
Barents Sea ◽  
Ice Cover ◽  
Atlantic Water ◽  
Transitional Period ◽  
Sea Surface ◽  
Sea Surface Salinity ◽  
Surface Conditions ◽  
The Barents Sea

Abstract Postglacial changes in sea-surface conditions, including sea-ice cover, summer temperature, salinity, and productivity were reconstructed from the analyses of dinocyst assemblages in core S2528 collected in the northwestern Barents Sea. The results show glaciomarine-type conditions until about 11,300 ± 300 cal yr BP and limited influence of Atlantic water at the surface into the Barents Sea possibly due to the proximity of the Svalbard-Barents Sea ice sheet. This was followed by a transitional period generally characterized by cold conditions with dense sea-ice cover and low-salinity pulses likely related to episodic freshwater or meltwater discharge, which lasted until 8700 ± 700 cal yr BP. The onset of “interglacial” conditions in surface waters was marked by a major change in dinocyst assemblages, from dominant heterotrophic to dominant phototrophic taxa. Until 4100 ± 150 cal yr BP, however, sea-surface conditions remained cold, while sea-surface salinity and sea-ice cover recorded large amplitude variations. By ~4000 cal yr BP optimum sea-surface temperature of up to 4°C in summer and maximum salinity of ~34 psu suggest enhanced influence of Atlantic water, and productivity reached up to 150 gC/m2/yr. After 2200 ± 1300 cal yr BP, a distinct cooling trend accompanied by sea-ice spreading characterized surface waters. Hence, during the Holocene, with exception of an interval spanning about 4000 to 2000 cal yr BP, the northern Barents Sea experienced harsh environments, relatively low productivity, and unstable conditions probably unsuitable for human settlements.

Manifestation of the Gothenburg geomagnetic field excursion in the Barents Sea bottom sediments

2007 ◽  
Vol 47 (6) ◽  
pp. 781-786 ◽  
Author(s):  
E. G. Guskova ◽  
O. M. Raspopov ◽  
A. L. Piskarev ◽  
V. A. Dergachev
Keyword(s):  
Bottom Sediments ◽  
Geomagnetic Field ◽  
Barents Sea ◽  
The Barents Sea ◽  
Sea Bottom ◽  
Field Excursion

scholarly journals Distribution of Polychaeta Communities in the Western and Northern Part of the Barents Sea

2020 ◽  
Author(s):  
Dinara Dikaeva ◽  
Elena Frolova
Keyword(s):  
Species Composition ◽  
Bottom Sediments ◽  
Barents Sea ◽  
Bottom Topography ◽  
Silty Clay ◽  
The Barents Sea ◽  
Structure Of Communities ◽  
Composition And Structure ◽  
Quantitative Characteristics ◽  
Hard Soils

Species composition and quantitative characteristics of polychaetes in the western and northern parts of the Barents Sea were analyzed on the basis of the material collected in July and November 2017 on MMBI expeditions aboard the RV “Dalniye Zelentsy”. Three faunistic polychaete complexes were revealed, depending on environmental conditions in the study area. A change in species composition and structure of communities from the bottom topography, structure of bottom sediments and bottom hydrodynamics were noted. An increase in biomass and density of polychaetes settlement was revealed in deep-water areas of the Barents Sea, on soft silty-clay soils, where the dominant species is Spiochaetopterus typicus. A decrease in quantitative characteristics of polychaetes was observed in shallow areas, on hard soils, in the zone of intensive erosion of bottom sediments as a result of warm and cold currents interaction, where the polychaete Nothria hyperborea dominated.

Isotopic Composition of Nd, Pb, and Sr in Modern Bottom Sediments of the Barents Sea

2019 ◽  
Vol 485 (1) ◽  
pp. 268-272 ◽  
Author(s):  
A. V. Maslov ◽  
A. B. Kuznetsov ◽  
N. V. Politova ◽  
N. V. Kozina ◽  
A. N. Novigatsky ◽  
...  
Keyword(s):  
Isotopic Composition ◽  
Bottom Sediments ◽  
Barents Sea ◽  
The Barents Sea

Rare and Trace Elements in the Modern Bottom Sediments of the Barents Sea

2020 ◽  
Vol 55 (1) ◽  
pp. 1-23
Author(s):  
A. V. Maslov ◽  
N. V. Politova ◽  
N. V. Kozina ◽  
V. P. Shevchenko ◽  
T. N. Alekseeva
Keyword(s):  
Trace Elements ◽  
Bottom Sediments ◽  
Barents Sea ◽  
The Barents Sea

Co, Hf, Ce, Cr, Th, and REE systematics of modern bottom sediments of the Barents sea

2019 ◽  
Vol 485 (2) ◽  
pp. 207-211
Author(s):  
A. V. Maslov ◽  
N. V. Politova ◽  
V. P. Shevchenko ◽  
N. V. Kozina ◽  
A. N. Novigatsk ◽  
...  
Keyword(s):  
Bottom Sediments ◽  
Barents Sea ◽  
Western Coast ◽  
Novaya Zemlya ◽  
The North ◽  
The Barents Sea ◽  
Franz Josef Land ◽  
Pechora River ◽  
Marine Areas ◽  
Bottom Grab

The Co, Hf, Ce, Cr, Th, and REE systematics are analyzed for modern sediments collected by a bottom grab during the 67th and 68th cruises of R/V “Akademik Mstislav Keldysh” and samples taken in the Barents Sea bays and inlets. Our results indicate that most modern bottom sediments are composed of fine silicoclastic material enhanced with a suspended matter of the North Cape current, which erodes the western coast of Scandinavia, and due to bottom erosion of some marine areas, as well as erosion of rock complexes of the Kola Peninsula, Novaya Zemlya, and Franz Josef Land (local provenances). Material from Spitsbergen also probably played a certain role. In the southern part of the Barents Sea, clastic material is supplied by the Pechora River.

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