Does the geomagnetic excursion trigger climate change?
| Project/Area Number |
15K21497
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Geology
Stratigraphy/Paleontology
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| Research Institution | Ritsumeikan University |
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Principal Investigator |
KITABA Ikuko 立命館大学, 総合科学技術研究機構, 准教授 (60631710)
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| Research Collaborator |
MARK Darren グラスゴー大学, 教授
SMITH Victoria オックスフォード大学, 准教授
ALBERT Paul G. オックスフォード大学, 研究員
NAKAGAWA Takeshi 立命館大学, 総合科学技術研究機構, 教授
HYODO Masayuki 神戸大学, 内海域環境教育研究センター, 教授
WATANABE Masami 文化財調査コンサルタント株式会社, 代表取締役
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| Project Period (FY) |
2015-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2015: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
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| Keywords | 気候変動 / 地磁気エクスカーション / モンスーン / 銀河宇宙線 / スベンスマルク効果 / 年縞堆積物 / 水月湖 / 定量的気候復元 |
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| Outline of Final Research Achievements |
This research aimed to reveal the climatic impact of moderate weakening of the geomagnetic field. We carried out pollen analysis of the SG14 sediment core from Lake Suigetsu, Japan, and reconstructed the climate during the last interglacial period (MIS 5), which contains the Blake excursion. The temperature signal in MIS 5 was dominated by ca. 20-kyr oscillation, which gradually damped through cycles. This means that the long-term climate change was primarily controlled by the orbital forcing. When we removed the component which arose from the boreal summer insolation, the residual component in temperature was positively correlated with the paleomagnetic intensity measured in the same core between 110 ka and 130 ka. On the other hand, there was no clear correlation between paleointensity and monsoon signals.
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Report
(4 results)
Research Products
(17 results)
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[Journal Article] Integrating the Holocene tephrostratigraphy for East Asia using a high-resolution cryptotephra study from Lake Suigetsu (SG14 core), central Japan2018
Author(s)
McLean, D., Albert, P., Nakagawa, T., Suzuki, T., Staff, R., Yamada, K., Kitaba, I., Haraguchi, T., Kitagawa, J., SG14 Project Members and Smith, V.
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Journal Title
Quaternary Science Reviews
Volume: 183
Pages: 36-58
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Journal Article] High-resolution stratigraphy across the early middle Pleistocene boundary from a core of the Kokumoto Formation at Tabuchi, Chiba Prefecture Japan2016
Author(s)
Hyodo, M., Kato, S., Kitamura, A., Takasaki, K., Matsubara, H., Kitaba, I., Tanaka, I., Nara, M., Matsuzaki, T., Dettman, D.L., Okada, M.
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Journal Title
Quaternary International
Volume: 397
Pages: 16-26
DOI
Related Report
Peer Reviewed / Open Access / Int'l Joint Research
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[Presentation] Spatio-temporal structure of deglacial climate change: climate changes reconstructed from varved sediments of Lake Ichi-no-megata, Northern Japan, and its correlation with global references2015
Author(s)
Ikuko Kitaba, Richard A. Staff, Yoshitsugu Shinozuka, Kazuyoshi Yamada, Katsuya Gotanda, Junko Kitagawa, Tsuyoshi Haraguchi, Takeshi Nakagawa, Hitoshi Yonenobu
Organizer
XIX INQUA Congress 2011
Place of Presentation
名古屋国際会議場（愛知県名古屋市）
Year and Date
2015-07-29
Related Report
Int'l Joint Research
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