Estimated Reservoir Ages of the Black Sea Since the Last Glacial
Accelerator mass spectrometry (AMS) radiocarbon dating of ostracod and gastropod shells from the southwestern Black Sea cores combined with tephrochronology provides the basis for studying reservoir age changes in the late-glacial Black Sea. The comparison of our data with records from the northwest...
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2008
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Online Access: | http://dx.doi.org/10.1017/s0033822200043393 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200043393 |
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crcambridgeupr:10.1017/s0033822200043393 2024-06-23T07:53:44+00:00 Estimated Reservoir Ages of the Black Sea Since the Last Glacial Kwiecien, O Arz, H W Lamy, F Wulf, S Bahr, A Röhl, U Haug, G H 2008 http://dx.doi.org/10.1017/s0033822200043393 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200043393 en eng Cambridge University Press (CUP) https://www.cambridge.org/core/terms Radiocarbon volume 50, issue 1, page 99-118 ISSN 0033-8222 1945-5755 journal-article 2008 crcambridgeupr https://doi.org/10.1017/s0033822200043393 2024-06-05T04:03:41Z Accelerator mass spectrometry (AMS) radiocarbon dating of ostracod and gastropod shells from the southwestern Black Sea cores combined with tephrochronology provides the basis for studying reservoir age changes in the late-glacial Black Sea. The comparison of our data with records from the northwestern Black Sea shows that an apparent reservoir age of ∼1450 14 C yr found in the glacial is characteristic of a homogenized water column. This apparent reservoir age is most likely due to the hardwater effect. Though data indicate that a reservoir age of ∼1450 14 C yr may have persisted until the Bølling-Allerød warm period, a comparison with the GISP2 ice-core record suggests a gradual reduction of the reservoir age to ∼1000 14 C yr, which might have been caused by dilution effects of inflowing meltwater. During the Bølling-Allerød warm period, soil development and increased vegetation cover in the catchment area of the Black Sea could have hampered erosion of carbonate bedrock, and hence diminished contamination by “old” carbon brought to the Black Sea basin by rivers. A further reduction of the reservoir age most probably occurred contemporary to the precipitation of inorganic carbonates triggered by increased phytoplankton activity, and was confined to the upper water column. Intensified deep water formation subsequently enhanced the mixing/convection and renewal of intermediate water. During the Younger Dryas, the age of the upper water column was close to 0 yr, while the intermediate water was ∼900 14 C yr older. The first inflow of saline Mediterranean water, at ∼8300 14 C yr BP, shifted the surface water age towards the recent value of ∼400 14 C yr. Article in Journal/Newspaper ice core Cambridge University Press Radiocarbon 50 1 99 118 |
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Open Polar |
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Cambridge University Press |
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crcambridgeupr |
language |
English |
description |
Accelerator mass spectrometry (AMS) radiocarbon dating of ostracod and gastropod shells from the southwestern Black Sea cores combined with tephrochronology provides the basis for studying reservoir age changes in the late-glacial Black Sea. The comparison of our data with records from the northwestern Black Sea shows that an apparent reservoir age of ∼1450 14 C yr found in the glacial is characteristic of a homogenized water column. This apparent reservoir age is most likely due to the hardwater effect. Though data indicate that a reservoir age of ∼1450 14 C yr may have persisted until the Bølling-Allerød warm period, a comparison with the GISP2 ice-core record suggests a gradual reduction of the reservoir age to ∼1000 14 C yr, which might have been caused by dilution effects of inflowing meltwater. During the Bølling-Allerød warm period, soil development and increased vegetation cover in the catchment area of the Black Sea could have hampered erosion of carbonate bedrock, and hence diminished contamination by “old” carbon brought to the Black Sea basin by rivers. A further reduction of the reservoir age most probably occurred contemporary to the precipitation of inorganic carbonates triggered by increased phytoplankton activity, and was confined to the upper water column. Intensified deep water formation subsequently enhanced the mixing/convection and renewal of intermediate water. During the Younger Dryas, the age of the upper water column was close to 0 yr, while the intermediate water was ∼900 14 C yr older. The first inflow of saline Mediterranean water, at ∼8300 14 C yr BP, shifted the surface water age towards the recent value of ∼400 14 C yr. |
format |
Article in Journal/Newspaper |
author |
Kwiecien, O Arz, H W Lamy, F Wulf, S Bahr, A Röhl, U Haug, G H |
spellingShingle |
Kwiecien, O Arz, H W Lamy, F Wulf, S Bahr, A Röhl, U Haug, G H Estimated Reservoir Ages of the Black Sea Since the Last Glacial |
author_facet |
Kwiecien, O Arz, H W Lamy, F Wulf, S Bahr, A Röhl, U Haug, G H |
author_sort |
Kwiecien, O |
title |
Estimated Reservoir Ages of the Black Sea Since the Last Glacial |
title_short |
Estimated Reservoir Ages of the Black Sea Since the Last Glacial |
title_full |
Estimated Reservoir Ages of the Black Sea Since the Last Glacial |
title_fullStr |
Estimated Reservoir Ages of the Black Sea Since the Last Glacial |
title_full_unstemmed |
Estimated Reservoir Ages of the Black Sea Since the Last Glacial |
title_sort |
estimated reservoir ages of the black sea since the last glacial |
publisher |
Cambridge University Press (CUP) |
publishDate |
2008 |
url |
http://dx.doi.org/10.1017/s0033822200043393 https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0033822200043393 |
genre |
ice core |
genre_facet |
ice core |
op_source |
Radiocarbon volume 50, issue 1, page 99-118 ISSN 0033-8222 1945-5755 |
op_rights |
https://www.cambridge.org/core/terms |
op_doi |
https://doi.org/10.1017/s0033822200043393 |
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Radiocarbon |
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50 |
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1 |
container_start_page |
99 |
op_container_end_page |
118 |
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1802645522439208960 |