2020 Fiscal Year Final Research Report
Reconstructing erosion rates to understand the interactions between tectonics and climate
| Project/Area Number |
18K13624
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 17030:Human geosciences-related
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| Research Institution | National Institute of Advanced Industrial Science and Technology |
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Principal Investigator |
Nakamura Atsunori 国立研究開発法人産業技術総合研究所, 地質調査総合センター, 研究員 (60817419)
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| Project Period (FY) |
2018-04-01 – 2021-03-31
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| Keywords | 宇宙線生成核種 / 侵食 / モンスーン / テクトニクス / 照射年代 / 加速器質量分析 / 10Be / 26Al |
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| Outline of Final Research Achievements |
Erosion is one of the main drivers that shapes the Earth's surface. This study developed methodologies in geochronology to improve the analytical techniques for measuring in-situ-produced cosmogenic nuclides. The results allowed us to obtain remarkably fast erosion rates and young exposure ages. We reconstructed the changes in erosion rates over the last twenty thousand years.
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| Free Research Field |
地球化学，古気候学，地形学，年代測定学，第四紀学
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| Academic Significance and Societal Importance of the Research Achievements |
地球上の地形がどのように形作られてきたかを明らかにするには，山地や山脈の侵食速度を知る必要がある．本研究は侵食速度を求めるために利用される宇宙線生成核種を用いた地球化学的手法の適用範囲を拡大させたことに意義がある．また，過去の侵食変動を明らかにすることは，気候変動に地表の侵食がどう応答するのかを把握する上で重要な知見となる．
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