2017 Fiscal Year Final Research Report
Coral skeletal records reveal the impact of short-term climatic cycles on the transition from Neanderthals to Homo Sapiens
| Project/Area Number |
15H03742
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Stratigraphy/Paleontology
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Kenkyū-buntansha) |
山崎 敦子 北海道大学, 理学研究院, 特任助教 (40723820)
佐々木 圭一 金沢学院大学, 基礎教育機構, 准教授 (50340021)
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Keywords | 古環境 / OIS3 / 化石サンゴ記録 / 人類変革期 |
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| Outline of Final Research Achievements |
We analyzed trace elements and oxygen isotopes in fossil corals (Plesiastrea versipora and Porites sp.) from the time interval during MIS3 in Kikai Island. We found clear cyclic changes in interannual to decadal scales. Within the 22-year temperature records in Porites corals 55,000 years ago, the range of seasonal temperature variation dropped by half for 4 years. The cold (warm) water in summer (winter) could mainly reflect air temperature because we could not find same variation in oxygen isotopes of Tridacna shells. This drastic changes in air temperature could impact on the human life styles such as their food and habitability environment.
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| Free Research Field |
地球環境学
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