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| Main Authors: | , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
| Published: |
PANGAEA
1995
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.763162 |
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| _version_ | 1867170460248047616 |
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| author | Nakatsuka, Takeshi Watanabe, Kazuki Handa, Nobuhiko Matsumoto, Eiji Wada, Eitaro |
| author_facet | Nakatsuka, Takeshi Watanabe, Kazuki Handa, Nobuhiko Matsumoto, Eiji Wada, Eitaro |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Stable carbon and nitrogen isotopic ratios (d13C and d15N) of organic matter were measured in three sediment cores from deep basins of the Bering Sea to investigate past changes in surface nutrient conditions. For surface water reconstructions, hemipelagic layers in the cores were distinguished from turbidite layers (on the basis of their sedimentary structures and 14C ages) and analyzed for isotopic studies. Although d13C profiles may have been affected by diagenesis, both d15N and d13C values showed common positive anomalies during the last deglaciation. We explain these anomalies as reflecting suppressed vertical mixing and low nutrient concentrations in surface waters caused by injection of meltwater from alpine glaciers around the Bering Sea. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_763162 |
| institution | PANGAEA |
| language | en |
| publishDate | 1995 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Stable carbon and nitrogen isotopic ratios of cores from the Bering Sea Nakatsuka, Takeshi Watanabe, Kazuki Handa, Nobuhiko Matsumoto, Eiji Wada, Eitaro Bering Sea; DR-13; DR-16; PC; Piston corer; St-11 Stable carbon and nitrogen isotopic ratios (d13C and d15N) of organic matter were measured in three sediment cores from deep basins of the Bering Sea to investigate past changes in surface nutrient conditions. For surface water reconstructions, hemipelagic layers in the cores were distinguished from turbidite layers (on the basis of their sedimentary structures and 14C ages) and analyzed for isotopic studies. Although d13C profiles may have been affected by diagenesis, both d15N and d13C values showed common positive anomalies during the last deglaciation. We explain these anomalies as reflecting suppressed vertical mixing and low nutrient concentrations in surface waters caused by injection of meltwater from alpine glaciers around the Bering Sea. |
| title | Stable carbon and nitrogen isotopic ratios of cores from the Bering Sea |
| topic | Bering Sea; DR-13; DR-16; PC; Piston corer; St-11 |
| url | https://doi.org/10.1594/PANGAEA.763162 |