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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MDPI AG
2023-07-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/11/7/1404 |
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| 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 |
| collection | DOAJ |
| 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 <sup>210</sup>Pb 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 <i>Akademik Nikolay Strakhov</i> directly in the ice scour and on the “background” seabed surface, not processed via ice scouring. According to the results of <sup>210</sup>Pb 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. |
| first_indexed | 2024-03-11T00:56:20Z |
| format | Article |
| id | doaj.art-0a07c886774247c1a750faeef2a1e357 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-11T00:56:20Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-0a07c886774247c1a750faeef2a1e3572023-11-18T19:59:46ZengMDPI AGJournal of Marine Science and Engineering2077-13122023-07-01117140410.3390/jmse11071404Pb-210 Dating of Ice Scour in the Kara SeaOsip Kokin0Irina Usyagina1Nikita Meshcheriakov2Roman Ananiev3Vasiliy Arkhipov4Aino Kirillova5Stepan Maznev6Sergey Nikiforov7Nikolay Sorokhtin8Geological Institute, Russian Academy of Sciences (GIN RAS), 7 Pyzhevsky per., 119017 Moscow, RussiaMurmansk Marine Biological Institute, Russian Academy of Sciences (MMBI RAS), 17 Vladimirskaya St., 183010 Murmansk, RussiaGeological Institute, Russian Academy of Sciences (GIN RAS), 7 Pyzhevsky per., 119017 Moscow, RussiaShirshov Institute of Oceanology, Russian Academy of Sciences (IO RAS), 36 Nakhimovsky Prospect, 117997 Moscow, RussiaGeological Institute, Russian Academy of Sciences (GIN RAS), 7 Pyzhevsky per., 119017 Moscow, RussiaGeological Institute, Russian Academy of Sciences (GIN RAS), 7 Pyzhevsky per., 119017 Moscow, RussiaGeological Institute, Russian Academy of Sciences (GIN RAS), 7 Pyzhevsky per., 119017 Moscow, RussiaShirshov Institute of Oceanology, Russian Academy of Sciences (IO RAS), 36 Nakhimovsky Prospect, 117997 Moscow, RussiaShirshov Institute of Oceanology, Russian Academy of Sciences (IO RAS), 36 Nakhimovsky Prospect, 117997 Moscow, RussiaIce 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 <sup>210</sup>Pb 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 <i>Akademik Nikolay Strakhov</i> directly in the ice scour and on the “background” seabed surface, not processed via ice scouring. According to the results of <sup>210</sup>Pb 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.https://www.mdpi.com/2077-1312/11/7/1404ice gougeiceberg ploughmarksediment corebathymetryseismic profilessediment accumulation rate (SAR) |
| spellingShingle | 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 Journal of Marine Science and Engineering ice gouge iceberg ploughmark sediment core bathymetry seismic profiles sediment accumulation rate (SAR) |
| title | 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_short | Pb-210 Dating of Ice Scour in the Kara Sea |
| title_sort | pb 210 dating of ice scour in the kara sea |
| topic | ice gouge iceberg ploughmark sediment core bathymetry seismic profiles sediment accumulation rate (SAR) |
| url | https://www.mdpi.com/2077-1312/11/7/1404 |
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