2011 Fiscal Year Final Research Report
Cross-dating methods of coral annual bands for reconstructing oceanic climate change
| Project/Area Number |
21740362
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Geology
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| Research Institution | Nagoya University |
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Principal Investigator |
MORIMOTO Maki 名古屋大学, 環境学研究科, 研究員 (30377999)
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| Co-Investigator(Renkei-kenkyūsha) |
ABE Osamu 名古屋大学, 大学院・環境学研究科, 助教 (00293720)
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| Project Period (FY) |
2009 – 2011
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| Keywords | サンゴ骨格 / 年輪 / 年代決定 / 酸素同位体比 |
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| Research Abstract |
A cross-dating method for coral skeletons was examined by connecting plural reconstructed paleoclimate records to make their chronology longer. Holocene fossil corals were collected from Sekisei lagoon, Ryukyu, Japan, and their radiocarbon ages were determined, annual bands were counted, and oxygen isotope ratios were measured. These results indicate that more than 400-year paleoclimate record will be obtained from overlapped chronologies of some coral samples. Besides, to make oxygen isotope analysis simpler and quicker, the precision, analysis time and optimum conditions for coral samples were examined for GasBench/isotope ratio mass spectrometry.
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