Concentration and composition of the suspended particulate matter of the Barents sea

2021 ◽  
pp. 253-269
Author(s):  
N.V. Politova ◽  
◽  
M.D. Kravchishina ◽  
A.N. Novigatsky ◽  
A.S. Lokhov ◽  
...  
Keyword(s):  
Suspended Matter ◽  
Barents Sea ◽  
Nepheloid Layer ◽  
Southeastern Part ◽  
Surface Distribution ◽  
The Barents Sea ◽  
Suspended Particulate ◽  
Sedimentary Matter ◽  
Pechora River ◽  
Deep Layers

The results of the study of the distribution and composition of the dispersed sedimentary matter (suspended matter) in the water column of the Barents Sea were presented in the article. The distribution of suspended matter in the sea obeys the laws of circumcontinental (for surface distribution) and vertical zonality. At the same time, the absolute values of the weight and volume concentrations of the suspended matter themselves are low (on average less than 0.5 mg/l and less than 1.0 mm3/l, respectively). The highest values of all parameters of the suspended matter were found in the Pechora Sea, the most southeastern part of the Barents Sea, where the abrasion of the shores and bottom erosion, and the Pechora River runoff. Surface and bottom peaks are characteristic of the vertical distribution of the suspended matter. An intrusion of the nepheloid layer enriched in the suspended matter into the deep layers can be observed on the continental slope when the depth makes a sharp fall.

scholarly journals Dispersed sedimentary matter of the Barents sea

2019 ◽  
Vol 59 (5) ◽  
pp. 777-790
Author(s):  
N. V. Politova ◽  
M. D. Kravchishina ◽  
A. N. Novigatsky ◽  
A. S. Lokhov
Keyword(s):  
Suspended Matter ◽  
Barents Sea ◽  
Nepheloid Layer ◽  
Southeastern Part ◽  
Surface Distribution ◽  
The Barents Sea ◽  
Sedimentary Matter ◽  
Pechora River ◽  
Deep Layers ◽  
The Vertical Distribution

The results of the study of the distribution and composition of the dispersed sedimentary matter (suspended matter) in the water column of the Barents Sea were presented in the article. The distribution of suspended matter in the sea obeys the laws of circumcontinental (for surface distribution) and vertical zonality. At the same time, the absolute values of the weight and volume concentrations of the suspended matter themselves are low (on average less than 0.5 mg/l and less than 0.6 mm3/l, respectively). The highest values of all parameters of the suspended matter were found in the Pechora Sea, the most southeastern part of the Barents Sea, where are the abrasion of the shores and the bottom and the Pechora River runoff. Surface and bottom peaks are characteristic of the vertical distribution of the suspended matter. A mild intrusion of the nepheloid layer enriched in the suspended matter into the deep layers was observed on the continental slope of the Bear Island Trench when the depth makes a sharp fall.

scholarly journals Distribution of suspended particulate matter in the Barents Sea in late winter 2019

2020 ◽  
Vol 66 (3) ◽  
pp. 267-278
Author(s):  
S. Buettner ◽  
V. V. Ivanov ◽  
H. Kassens ◽  
N. A. Kusse-Tiuz
Keyword(s):  
Particulate Matter ◽  
Suspended Particulate Matter ◽  
Barents Sea ◽  
Optical Data ◽  
Late Winter ◽  
Nepheloid Layer ◽  
Major Pathway ◽  
Sediment Distribution ◽  
The Barents Sea ◽  
Suspended Particulate

Arctic summer and winter sea-ice extent is continuously declining as a result of climate change, affecting the hydrography and biogeochemical cycles on the seasonally ice-free Eurasian Shelves. The prolongation of the open-water season causes higher sediment resuspension and coastal erosion due to larger wind fetch and wave heights. This impacts the optical properties of the water column and hence biological productivity in this region. During “Transarktika-2019” leg 1 in late winter 2019, a comprehensive dataset of and optical data was collected throughout the central and northern Barents Sea. Combining suspended particulate matter concentrations obtained from water samples and optical data revealed a pronounced bottom nepheloid layer on the Barents Sea shelf even under ice-covered conditions. Moreover, the data indicate that the Franz Viktoria Trough could be a major pathway for sediment transport into the Eurasian Basin. Therefore, to link changes in sediment distribution and its impact on the ecosystem under a warming climate, further studies of sediment dynamics are required, particularly during winter.

scholarly journals The Long-Term Monitoring of Bird Populations on Kolguev Island in the Barents Sea

ARCTIC ◽  
2021 ◽  
Vol 74 (5) ◽  
pp. 23-40
Author(s):  
Petr M. Glazov ◽  
Julia A. Loshchagina ◽  
Alexander V. Kondratyev ◽  
Elmira M. Zaynagutdinova ◽  
Helmut Kruckenberg ◽  
...  
Keyword(s):  
Barents Sea ◽  
Bird Species ◽  
Breeding Density ◽  
Southeastern Part ◽  
Barnacle Goose ◽  
The Barents Sea ◽  
Long Term Monitoring ◽  
Term Monitoring ◽  
Kolguev Island

Kolguev Island (69˚05′ N 49˚15′ E) is located in the Pechora Sea, the southeastern part of the Barents Sea. The island’s ecosystem is unusual due to the total absence of rodents and specialized predators such as weasels, while non-specialized predators such as Arctic (Vulpes lagopus) and red (V. vulpes) foxes and Rough-legged Hawk (Buteo lagopus) are common. Currently, 111 bird species have been registered here, of which 58 are nesting. The absence of rodents and the relatively stable predation pressure have resulted in the high abundance of many bird species: Willow Ptarmigan (Lagopus lagopus), several goose species, some waders, and passerines. Over the 125-year history of ornithological studies on Kolguev, the island avifauna has changed significantly. The trend of an increase in the proportion of widespread and Siberian species together with a decrease in the proportion of Arctic species was observed. Since 2006, a thorough monitoring of Kolguev avifauna has been carried out, during which the dynamics of the bird population densities have been traced. The abundance of Black-bellied Plover (Pluvialis squatarola) and Dunlin (Calidris alpina) decreased, while the numbers of Barnacle Goose (Branta leucopsis) have increased sharply since the 1980s. The breeding density of Rough-legged Hawk has also increased in recent years. The long-term monitoring of Kolguev ecosystems has indicated the high international conservation value of the island due to the high breeding density of many bird species. Our study, covering more than a century of avifaunal studies with almost annual monitoring over the past three decades, provides an unusually long and detailed time-series for an Arctic island.

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.

Hydrocarbons in waters and bottom sediments Of the Barents sea

2021 ◽  
pp. 531-547
Author(s):  
I.A. Nemirovskaya ◽  
◽  
A.M. Titova ◽  
A.V. Khramtsova ◽  
◽  
...  
Keyword(s):  
Organic Matter ◽  
Surface Layer ◽  
Organic Carbon ◽  
Bottom Sediments ◽  
Suspended Matter ◽  
Biochemical Composition ◽  
Barents Sea ◽  
Oil Pollution ◽  
Early Summer ◽  
The Barents Sea

Hydrocarbons in water, suspended matter and bottom sediments of the Barents Sea were studied based on materials from expeditions to the RV Akademik Mstislav Keldysh in 2016–2019. It is shown that at present there is no oil pollution in open areas of the Barents Sea. With the transition from early summer (2019) to autumn (2016), there was a decrease in hydrocarbon concentrations in surface waters, caused by a change in the biochemical composition of organic matter (possibly due to a decrease in the area of ice). With depth, the HC content decreased mainly. An exception was observed in the area of gutters and deposits, where in the bottom nepheloid layers there was an increase in the concentration of hydrocarbons in suspension and in the surface layer of bottom sediments, and in the thickness of the sediments there was no dependence on their distribution and organic carbon.

Element composition of suspended particulate matter in the Barents sea

2021 ◽  
pp. 270-277
Author(s):  
D.P. Starodymova ◽  
◽  
A.I. Kochenkova ◽  
M.D. Kravchishina ◽  
◽  
...  
Keyword(s):  
Particulate Matter ◽  
Elemental Composition ◽  
Suspended Particulate Matter ◽  
Barents Sea ◽  
Water Layer ◽  
Water Area ◽  
Significant Heterogeneity ◽  
The Barents Sea ◽  
Suspended Particulate ◽  
Icp Ms

The elemental composition of suspended particulate matter (SPM) in the Barents Sea was studied based on the materials of the 68th cruise of the RV Akademik Mstislav Keldysh, August 2017, using ICP-MS and AAS methods. SPM of the sea surface layer is characterized by significant heterogeneity in the elemental composition, which is due to differences in the course of biogeochemical processes over the water area (for example, high differences in the level of primary production) and different compositions of terrigenous matter from the sources. Biophilic elements significantly enrich the SPM of the surface water layer and fluffy layer relative to the average composition of the earth's crust (the degree of enrichment of the surface SPM is higher than the fluffy layer).

Coastal erosion in the southeastern part of the Barents Sea

1989 ◽  
Vol 13 (1) ◽  
pp. 46-50
Author(s):  
V. N. Novikov ◽  
Ye. V. Fedorova
Keyword(s):  
Coastal Erosion ◽  
Barents Sea ◽  
Southeastern Part ◽  
The Barents Sea

scholarly journals Distribution of suspended particulate matter at the equatorial transect in the Atlantic Ocean

2021 ◽  
Author(s):  
Vadim Sivkov ◽  
Ekaterina Bubnova
Keyword(s):  
Particulate Matter ◽  
Suspended Particulate Matter ◽  
Suspended Matter ◽  
Solid Particles ◽  
Saharan Dust ◽  
Western Boundary ◽  
Boundary Current ◽  
Equatorial Atlantic ◽  
Nepheloid Layer ◽  
Suspended Particulate

Abstract. Studied oceanographic transect across the Equatorial Atlantic is considered as a “screenshot” of suspended particulate matter distribution against a hydrographical background. The area of abnormal high suspended matter volume concentrations was found above the Sierra Leone Rise from top to bottom (eastern part of the transect). The suggested explanation for the anomaly is based on the ballast hypothesis whereby solid particles are incorporated as ballast into suspended biogenic aggregates, leading to increased velocities of sinking. This process is located within the Northwest African upwelling area since the plankton exposed to the Saharan dust abundance form a significant number of aggregates lately transported equatorward via Canary Current. The intermediate nepheloid layer associated with the Deep Western Boundary Current was recorded from the American Slope at the 3200–3700 m to the depth of 4300 m above the Para Abyssal Plain. Antarctic Bottom Water enriched in the suspended matter was found mostly in the troughs at 40–41° W. It was detached from the bottom, coinciding with the core of the flow due to the bottom rise (“dam”) located up-stream. The grain size of particles was in accordance with polymodal distribution – the 2–4 μm and the 8–13 μm modes. The registered rise in the percentage of the 7–21 μm-sized particles suggests the presence of the well-known coarse mode (20–60 μm) formed by aggregation of transparent exopolymer particles (mucus).

scholarly journals Hydrological studies in the north-eastern part of the Barents Sea in 2019 and 2020

2021 ◽  
Vol 12 (3-2021) ◽  
pp. 75-81
Author(s):  
T.M. Maksimovskaya ◽  
◽  
G.V. Ilyin ◽  
Keyword(s):  
Barents Sea ◽  
Water Structure ◽  
The North ◽  
The Barents Sea ◽  
North Eastern ◽  
Deep Layers ◽  
Deep Current ◽  
North Eastern Part ◽  
Made In

The article presents the results of hydrological studies of the north-eastern part of the Barents Sea. The observations were made in the oceanographic expeditions R/W “Dalnie Zelentsy” of the MMBI RAS in October–November 2019 and 2020. The analysis of a series of hydrological sections is carried out, which details the vision of the structure of the waters and currents of the studied area. In the water structure, two streams of Atlantic waters are distinguished. The flows are directed opposite to each other and are located in different deep layers. The Atlantic stream emerging from the Barents Sea is identified as a branch of the warm New Earth current. At the beginning of the winter,the current spreads in a layer from the surface to 50–75 m. The Atlantic waters flowing into the Barents Sea are identified as a branch of the deep current of the St. Anna trench. They come from the Polar Basin and pass into the sea from east to west up to 62–60o E.

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