Monitoring the environmental contamination of Kara Sea and shallow bays of Novaya Zemlya

Travkina, A. V.; Goryachenkova, T. A.; Borisov, A. P.; Solovieva, G. Yu.; Ligaev, A. N.; Новиков, А. П.

doi:10.1007/s10967-016-5163-0

Cited by 12 publications

(5 citation statements)

References 16 publications

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“…The specific activity values for Cs-137 in the surface layer of the examined sediments vary within the limits of 0.5-18 Bq/kg (Table 3). In general, these levels are comparable to the average background values of technogenic activity characteristic of the Arctic seas [32,36,73].…”

Section: Cs-137 In the Arctic Seas' Sedimentssupporting

confidence: 60%

“…The content of Cs-137 was determined by a line of 661.6 keV using a gamma-ray spectrometer with a semiconductor detector manufactured from the pure germanium (size of 70 × 25 mm) with Genie 2000 software (Canberra Industries, Inc., Zellik, Belgium). The efficiency of the calibration was examined using standard reference material IAEA-315 and intercalibration standard MAPEP 97 S4 (United States Department of Energy, Washington, DC, USA) [36].…”

Section: The Radionuclide Analysismentioning

confidence: 99%

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The Features of Distribution of Chemical Elements, including Heavy Metals and Cs-137, in Surface Sediments of the Barents, Kara, Laptev and East Siberian Seas

et al. 2022

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Over the recent few decades, due to climate warming and the continuing exploration of Arctic seas’ mineral resources, the scientific interest in contamination problems has deepened significantly. In this study, for the first time, we characterize the distribution features of 47 elements (major and trace elements, including heavy metals, metalloid As, and Cs-137 technogenic radionuclide) in surface bottom sediments from some areas of the Barents, Kara, Laptev, and East-Siberian Seas. The lithogenic material was the main factor that controlled variability in many elements (Be, Al, Ti, Cr, Ga, Rb, Sr, Y, Zr, Nb, Ba, REE, Pb, Th, U, W, and Cs). Among the hydrogenic processes, the formation of Fe and Mn oxyhydroxides has the greatest impact on the Mn, Fe, Co, Ni, Cu, Ge, and Mo, and insignificantly V and Sb, variability in sediments. These, along with minor to moderate values of enrichment factor (EF) for most elements, allowed us to conclude that the observed element distribution is related to predominantly natural processes of thermal abrasion, river-run, and atmospheric input. The exception is As, which exhibited the elevated EF (up to 20) in the western and central Kara Sea, as well as in the Vilkitsky Strait. Since no significant relationship between As and Fe andMn oxyhydroxides distribution was found, we may assume primarily an anthropogenic source of As, related to the peat and/or coal combustion. According to the criteria of Ecological Risks assessment, all the examined areas have a low degree of risk. Data on the specific activity of Cs-137 correspond to the background average values characteristic for these regions. The highest levels of Cs-137 concentration (Bq/kg) were detected in the sediments of the Ob and Yenisei Rivers’ estuaries.

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Section: Cs-137 In the Arctic Seas' Sedimentssupporting

confidence: 60%

Section: The Radionuclide Analysismentioning

confidence: 99%

The Features of Distribution of Chemical Elements, including Heavy Metals and Cs-137, in Surface Sediments of the Barents, Kara, Laptev and East Siberian Seas

et al. 2022

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“…We dated the sediment core by 210 Pb and 137 Cs at the Vernadsky Institute of Geochemistry and Analytical Chemistry (Moscow, Russia) (Ylikorkko et al 2015;Travkina et al 2017). Dating of sediments by 210 Pb covers the time interval of about the past 150 years.…”

Section: Sample Processingmentioning

confidence: 99%

“…DSA-1000 is a complete integrated multi-channel analyzer with a resolution of 16K channels, built based on modern digital signal processing. In conjunction with the analyzer DSA-1000, the Germanium detector BEGe3825 forms a complete installation of spectrometry for undertaking recruitment and analysis of the spectra with the highest quality (Travkina et al 2017). Genie 2000 software (version 2.1) has been used to process the recorded spectra (Travkina et…”

Section: Sample Processingmentioning

confidence: 99%

Recent shift in diatom record from Lake Rabbvatnet: response to global warming or solar variability?

et al. 2023

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Within the last decades, phytoplankton biomass has significantly risen in many lakes worldwide. Global warming was proposed as the most probable cause of the discovered effect. In this work, attention was paid to other drivers than just global warming, in particular, variability in solar radiation to explain this unexpected diatom shift. Here, we use a combination of paleolimnological, dendrochronological and meteorological datasets, as well as local pollution information, to analyze the recent growth of diatom total abundance in Lake Rabbvatnet (69.7º N, 30.5º E, Northern Norway). The results show that the diatoms of the genus Aulacoseira were most abundant in the top layers of the sediment core. On the contrary, the biomass of small-sized Cyclotella species, which, as a rule, should grow simultaneously with warming, has decreased over the past decades. We suggest basing on the experimental data analysis (comparison of diatom abundance with solar irradiance and heavy metals, testing of air temperature trends) that the recent growth of the total diatom abundance observed in the subarctic Rabbvatnet Lake could be mainly due to an increase in photosynthetically active spectral solar irradiance fluxes in the visible and infrared ranges.

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“…3). Ранее этот факт был отмечен в нескольких работах по мониторингу Карского моря (Travkina et al, 2017;Галимов и др., 1996 239,240 Pu (0.8-1.9 Бк/м 3 ), в то время как в составе глобальных выпадений количество нептуния в объектах окружающей среды ниже или равно содержанию плутония. Можно предположить, что, поступая в морскую воду из различных источников, радионуклиды 239,240 Pu и 237 Np ведут себя по-разному: 237 Np как более растворимый элемент остается в водной среде, в то время как 239,240 Pu соосаждается в составе минеральных взвесей и органического вещества морской воды и депонируется в донных осадках.…”

Section: Introductionunclassified

Content of technogenic radionuclides in water, bottom sediments and benthos of the Kara sea and shallow bays of the Novaya zemlya archipelago

et al. 2019

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During the expedition on the Akademik Mstislav Keldysh research vessel in 2016 year it was established that the content of radioactive cesium in the sea water of the Novaya Zemlya archipelago bays and open sea are at a level corresponding to the global fallout (1 Bq /m3). Plutonium content in water is slightly higher .The activity of neptunium in water is an order of magnitude higher than the activity of plutonium (0.761.89 Bq/m3), although its content in global fallout is almost two orders of magnitude lower than the plutonium content. The plutonium content in the bottom sediments of the Kara Sea is 0.23.8 Bq/kg. The content of radioactive cesium is as high as possible in the mouth of the Yenisei River (up to 21 Bq/kg) Analysis of benthic samples showed that the content of radioactive cesium and plutonium in samples taken in the bays of the Novaya Zemlya archipelago is below the detection limit. The neptunium content in the benthos samples is above the detection limit and amounts to 180 Bq/kg wet weight. It was showed that the content of neptunium in benthos is one of the indicators of radioactive contamination of the marine environment.

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Monitoring the environmental contamination of Kara Sea and shallow bays of Novaya Zemlya

Cited by 12 publications

References 16 publications

The Features of Distribution of Chemical Elements, including Heavy Metals and Cs-137, in Surface Sediments of the Barents, Kara, Laptev and East Siberian Seas

The Features of Distribution of Chemical Elements, including Heavy Metals and Cs-137, in Surface Sediments of the Barents, Kara, Laptev and East Siberian Seas

Recent shift in diatom record from Lake Rabbvatnet: response to global warming or solar variability?

Content of technogenic radionuclides in water, bottom sediments and benthos of the Kara sea and shallow bays of the Novaya zemlya archipelago

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