7Be, 210Pbatm and 137Cs in Snow Deposits in the Arctic Part of Western Siberia (Yamal-Nenets Autonomous District)
Radioactive isotopes (7Be, 210Pbatm and 137Cs) are used as indicators of processes associated with the transfer of matter from the atmosphere. Studying snow cover can provide information about the seasonal deposition flux of the isotopes to the Earth’s surface over the entire period of snow accumula...
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ftmdpi:oai:mdpi.com:/2073-4433/11/8/825/ 2023-08-20T04:04:19+02:00 7Be, 210Pbatm and 137Cs in Snow Deposits in the Arctic Part of Western Siberia (Yamal-Nenets Autonomous District) Kseniya Mezina Mikhail Melgunov Dmitriy Belyanin agris 2020-08-05 application/pdf https://doi.org/10.3390/atmos11080825 EN eng Multidisciplinary Digital Publishing Institute Air Quality https://dx.doi.org/10.3390/atmos11080825 https://creativecommons.org/licenses/by/4.0/ Atmosphere; Volume 11; Issue 8; Pages: 825 7 Be 210 Pb atm 137 Cs atmosphere Arctic snow precipitation Text 2020 ftmdpi https://doi.org/10.3390/atmos11080825 2023-07-31T23:53:01Z Radioactive isotopes (7Be, 210Pbatm and 137Cs) are used as indicators of processes associated with the transfer of matter from the atmosphere. Studying snow cover can provide information about the seasonal deposition flux of the isotopes to the Earth’s surface over the entire period of snow accumulation. The purpose of this study is to identify the features of 7Be, 210Pbatm and 137Cs deposition with the atmospheric precipitation in winter in the Arctic part of Western Siberia and to study the contribution of the particulate fractions of suspended matter in snow water to the total content of the radionuclides in samples of integrated seasonal snowfall. Snow samples were taken over a wide area along the highways around Novy Urengoy in April 2019. The suspended matter in snow samples was divided into three fractions. The isotopic composition was determined by high-resolution semiconductor gamma-spectrometry. The seasonal deposition flux of 7Be and 210Pbatm in the winter at the time of sampling averaged 58.7 and 25.2 Bq m−2 season−1, respectively. The average specific activity of 7Be and 210Pbatm in the snow water was 248.0 and 104.5 mBq L−1. The deposition flux of 137Cs from the atmosphere was low compared to 7Be and 210Pbatm and did not exceed 0.39 Bq m−2 season−1 at all sampling points. This indicates an insignificant modern flux of the radionuclide from the atmosphere. The separation of suspended matter in snow water by particulate fractions shows that the studied isotopes are present in all the extracted fractions: >3, 0.45–3 and <0.45 μm. The main part of 210Pbatm in all studied samples is in the coarse-grained fraction >3 μm. Most 7Be is contained in finely dispersed aerosols, colloids, or a dissolved component (where the fraction <0.45 μm). A significant increase in the contribution of coarse-grained fractions of suspended matter in snow water to the total activity of 7Be in snow precipitation was observed in territories with a higher anthropogenic impact. Text Arctic nenets Siberia MDPI Open Access Publishing Arctic Urengoy ENVELOPE(78.437,78.437,65.960,65.960) Atmosphere 11 8 825 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
7 Be 210 Pb atm 137 Cs atmosphere Arctic snow precipitation |
spellingShingle |
7 Be 210 Pb atm 137 Cs atmosphere Arctic snow precipitation Kseniya Mezina Mikhail Melgunov Dmitriy Belyanin 7Be, 210Pbatm and 137Cs in Snow Deposits in the Arctic Part of Western Siberia (Yamal-Nenets Autonomous District) |
topic_facet |
7 Be 210 Pb atm 137 Cs atmosphere Arctic snow precipitation |
description |
Radioactive isotopes (7Be, 210Pbatm and 137Cs) are used as indicators of processes associated with the transfer of matter from the atmosphere. Studying snow cover can provide information about the seasonal deposition flux of the isotopes to the Earth’s surface over the entire period of snow accumulation. The purpose of this study is to identify the features of 7Be, 210Pbatm and 137Cs deposition with the atmospheric precipitation in winter in the Arctic part of Western Siberia and to study the contribution of the particulate fractions of suspended matter in snow water to the total content of the radionuclides in samples of integrated seasonal snowfall. Snow samples were taken over a wide area along the highways around Novy Urengoy in April 2019. The suspended matter in snow samples was divided into three fractions. The isotopic composition was determined by high-resolution semiconductor gamma-spectrometry. The seasonal deposition flux of 7Be and 210Pbatm in the winter at the time of sampling averaged 58.7 and 25.2 Bq m−2 season−1, respectively. The average specific activity of 7Be and 210Pbatm in the snow water was 248.0 and 104.5 mBq L−1. The deposition flux of 137Cs from the atmosphere was low compared to 7Be and 210Pbatm and did not exceed 0.39 Bq m−2 season−1 at all sampling points. This indicates an insignificant modern flux of the radionuclide from the atmosphere. The separation of suspended matter in snow water by particulate fractions shows that the studied isotopes are present in all the extracted fractions: >3, 0.45–3 and <0.45 μm. The main part of 210Pbatm in all studied samples is in the coarse-grained fraction >3 μm. Most 7Be is contained in finely dispersed aerosols, colloids, or a dissolved component (where the fraction <0.45 μm). A significant increase in the contribution of coarse-grained fractions of suspended matter in snow water to the total activity of 7Be in snow precipitation was observed in territories with a higher anthropogenic impact. |
format |
Text |
author |
Kseniya Mezina Mikhail Melgunov Dmitriy Belyanin |
author_facet |
Kseniya Mezina Mikhail Melgunov Dmitriy Belyanin |
author_sort |
Kseniya Mezina |
title |
7Be, 210Pbatm and 137Cs in Snow Deposits in the Arctic Part of Western Siberia (Yamal-Nenets Autonomous District) |
title_short |
7Be, 210Pbatm and 137Cs in Snow Deposits in the Arctic Part of Western Siberia (Yamal-Nenets Autonomous District) |
title_full |
7Be, 210Pbatm and 137Cs in Snow Deposits in the Arctic Part of Western Siberia (Yamal-Nenets Autonomous District) |
title_fullStr |
7Be, 210Pbatm and 137Cs in Snow Deposits in the Arctic Part of Western Siberia (Yamal-Nenets Autonomous District) |
title_full_unstemmed |
7Be, 210Pbatm and 137Cs in Snow Deposits in the Arctic Part of Western Siberia (Yamal-Nenets Autonomous District) |
title_sort |
7be, 210pbatm and 137cs in snow deposits in the arctic part of western siberia (yamal-nenets autonomous district) |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/atmos11080825 |
op_coverage |
agris |
long_lat |
ENVELOPE(78.437,78.437,65.960,65.960) |
geographic |
Arctic Urengoy |
geographic_facet |
Arctic Urengoy |
genre |
Arctic nenets Siberia |
genre_facet |
Arctic nenets Siberia |
op_source |
Atmosphere; Volume 11; Issue 8; Pages: 825 |
op_relation |
Air Quality https://dx.doi.org/10.3390/atmos11080825 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/atmos11080825 |
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Atmosphere |
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11 |
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8 |
container_start_page |
825 |
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1774714706294996992 |