Pb-210 Dating of Ice Scour in the Kara Sea
Ice scours are formed when the keels of floating icebergs or sea ice hummocks penetrate unlithified seabed sediments. Until now, ice scours have been divided into “relict” and “modern” according to the water depth that corresponds with the possible maximum vertical dimensions of the keels of modern...
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ftmdpi:oai:mdpi.com:/2077-1312/11/7/1404/ 2023-08-20T04:05:32+02:00 Pb-210 Dating of Ice Scour in the Kara Sea Osip Kokin Irina Usyagina Nikita Meshcheriakov Roman Ananiev Vasiliy Arkhipov Aino Kirillova Stepan Maznev Sergey Nikiforov Nikolay Sorokhtin agris 2023-07-12 application/pdf https://doi.org/10.3390/jmse11071404 EN eng Multidisciplinary Digital Publishing Institute Geological Oceanography https://dx.doi.org/10.3390/jmse11071404 https://creativecommons.org/licenses/by/4.0/ Journal of Marine Science and Engineering; Volume 11; Issue 7; Pages: 1404 ice gouge iceberg ploughmark sediment core bathymetry seismic profiles sediment accumulation rate (SAR) specific activity radionuclides Baydaratskaya Bay Text 2023 ftmdpi https://doi.org/10.3390/jmse11071404 2023-08-01T10:50:11Z Ice scours are formed when the keels of floating icebergs or sea ice hummocks penetrate unlithified seabed sediments. Until now, ice scours have been divided into “relict” and “modern” according to the water depth that corresponds with the possible maximum vertical dimensions of the keels of modern floating icebergs. However, this approach does not consider climatic changes at the present sea level, which affect the maximum depth of ice keels. We present an application of 210Pb dating of the largest ice scour in the Baydaratskaya Bay area (Kara Sea), located at depths of about 28–32 m. Two sediment cores were studied; these were taken on 2 November 2021 from the R/V Akademik Nikolay Strakhov directly in the ice scour and on the “background” seabed surface, not processed via ice scouring. According to the results of 210Pb dating, the studied ice scour was formed no later than the end of the Little Ice Age. Based on the extrapolation of possible sedimentation rates prior to 1917 (0.22–0.38 cm/year), the age of the ice scour is estimated to be 1810 ± 30 AD. The mean rate of ice scour filling with 70 cm thick sediments from the moment of its formation is around 0.33 cm/year. Text Baydaratskaya bay Kara Sea Sea ice MDPI Open Access Publishing Kara Sea Nikolay ENVELOPE(140.000,140.000,71.617,71.617) Journal of Marine Science and Engineering 11 7 1404 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
ice gouge iceberg ploughmark sediment core bathymetry seismic profiles sediment accumulation rate (SAR) specific activity radionuclides Baydaratskaya Bay |
spellingShingle |
ice gouge iceberg ploughmark sediment core bathymetry seismic profiles sediment accumulation rate (SAR) specific activity radionuclides Baydaratskaya Bay Osip Kokin Irina Usyagina Nikita Meshcheriakov Roman Ananiev Vasiliy Arkhipov Aino Kirillova Stepan Maznev Sergey Nikiforov Nikolay Sorokhtin Pb-210 Dating of Ice Scour in the Kara Sea |
topic_facet |
ice gouge iceberg ploughmark sediment core bathymetry seismic profiles sediment accumulation rate (SAR) specific activity radionuclides Baydaratskaya Bay |
description |
Ice scours are formed when the keels of floating icebergs or sea ice hummocks penetrate unlithified seabed sediments. Until now, ice scours have been divided into “relict” and “modern” according to the water depth that corresponds with the possible maximum vertical dimensions of the keels of modern floating icebergs. However, this approach does not consider climatic changes at the present sea level, which affect the maximum depth of ice keels. We present an application of 210Pb dating of the largest ice scour in the Baydaratskaya Bay area (Kara Sea), located at depths of about 28–32 m. Two sediment cores were studied; these were taken on 2 November 2021 from the R/V Akademik Nikolay Strakhov directly in the ice scour and on the “background” seabed surface, not processed via ice scouring. According to the results of 210Pb dating, the studied ice scour was formed no later than the end of the Little Ice Age. Based on the extrapolation of possible sedimentation rates prior to 1917 (0.22–0.38 cm/year), the age of the ice scour is estimated to be 1810 ± 30 AD. The mean rate of ice scour filling with 70 cm thick sediments from the moment of its formation is around 0.33 cm/year. |
format |
Text |
author |
Osip Kokin Irina Usyagina Nikita Meshcheriakov Roman Ananiev Vasiliy Arkhipov Aino Kirillova Stepan Maznev Sergey Nikiforov Nikolay Sorokhtin |
author_facet |
Osip Kokin Irina Usyagina Nikita Meshcheriakov Roman Ananiev Vasiliy Arkhipov Aino Kirillova Stepan Maznev Sergey Nikiforov Nikolay Sorokhtin |
author_sort |
Osip Kokin |
title |
Pb-210 Dating of Ice Scour in the Kara Sea |
title_short |
Pb-210 Dating of Ice Scour in the Kara Sea |
title_full |
Pb-210 Dating of Ice Scour in the Kara Sea |
title_fullStr |
Pb-210 Dating of Ice Scour in the Kara Sea |
title_full_unstemmed |
Pb-210 Dating of Ice Scour in the Kara Sea |
title_sort |
pb-210 dating of ice scour in the kara sea |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/jmse11071404 |
op_coverage |
agris |
long_lat |
ENVELOPE(140.000,140.000,71.617,71.617) |
geographic |
Kara Sea Nikolay |
geographic_facet |
Kara Sea Nikolay |
genre |
Baydaratskaya bay Kara Sea Sea ice |
genre_facet |
Baydaratskaya bay Kara Sea Sea ice |
op_source |
Journal of Marine Science and Engineering; Volume 11; Issue 7; Pages: 1404 |
op_relation |
Geological Oceanography https://dx.doi.org/10.3390/jmse11071404 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/jmse11071404 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
11 |
container_issue |
7 |
container_start_page |
1404 |
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1774716084792852480 |