2016 Fiscal Year Final Research Report
Sea-surface temperature reconstruction in the glacial Japan Sea based on clumped isotopes
| Project/Area Number |
15K13585
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Kyushu University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
NAOHIRO YOSHIDA 東京工業大学, 物質理工学院・応用化学系, 教授 (60174942)
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| Research Collaborator |
KYOHEI TANIZAKI 九州大学, 大学院理学府・地球惑星科学専攻
JONAOTARO ONODERA 海洋研究開発機構, 主任研究員
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| Project Period (FY) |
2015-04-01 – 2017-03-31
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| Keywords | 日本海 / 最終氷期 / 海表面水温 / 海表面塩分 / 対馬暖流 |
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| Outline of Final Research Achievements |
In order to reconstruct sea-surface temperature (SST) in the glacial Japan Sea, we have performed clumped-isotopes measurements on planktic foraminiferal tests and silicoflagellate assemblages in marine sediment from the Wakasa Bay in the Japan Sea. As for clumped isotopes, our efforts were focused on improvement of reproducibility. Based on modern analogue tecnic of silicoflagellate assemblage, we have reconstructed SST changes from 30 ka to 5 ka. During glacial period, reconstructed SST was ~5 degree C. Subsequent SST rise was found during deglacial period. Since 12 ka, reconstructed SST was ~14degree C, which was comparable to the modern values. This result suggest that the Tsushima Warm Current has resumed during then.
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| Free Research Field |
古海洋学
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