What causes a cooling event during geomagnetic reversals
| Project/Area Number |
22340154
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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 | Kobe University |
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Principal Investigator |
HYODO Masayuki 神戸大学, 自然科学系先端融合研究環内海域環境教育研究センター, 教授 (60183919)
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| Co-Investigator(Kenkyū-buntansha) |
OKADA Makoto 茨城大学, 理学部, 准教授 (00250978)
KATOH Shigehiro 兵庫県立人と資源の博物館, 自然・環境評価部門, 主任研究員 (50301809)
KITABA Ikuko 神戸大学, 内海域環境教育研究センター, 助教 (60631710)
SATO Hiroshi 兵庫県立大学, 付置研究所, 教授 (80254457)
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| Co-Investigator(Renkei-kenkyūsha) |
KITABA Ikuko 神戸大学, 内海域環境教育研究センター, 助教 (60631710)
MATSUSHITA Mariko 財)国立文化財機構, 奈良文化財研究所, 客員研究員 (50110804)
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| Project Period (FY) |
2010 – 2012
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| Project Status |
Completed (Fiscal Year 2012)
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| Budget Amount *help |
¥19,500,000 (Direct Cost: ¥15,000,000、Indirect Cost: ¥4,500,000)
Fiscal Year 2012: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2011: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2010: ¥11,960,000 (Direct Cost: ¥9,200,000、Indirect Cost: ¥2,760,000)
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| Keywords | 地磁気逆転 / 寒冷化 / スベンスマルク効果 / 銀河宇宙線 / 宇宙線 |
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| Research Abstract |
The climatic effects of cloud formation induced by galactic cosmic rays (CR) has recently become a topic of much discussion. The CR-cloud connection suggests that variations in geomagnetic field intensity could change climate through modulation of CR flux. To verify this hypothesis, we investigated paleoclimate and paleoenvironment for five interglacial periods, and found cooling occurred when the field intensity dropped to 40% increase in CR flux. The climate warmed rapidly when field intensity recovered. We suggest that geomagnetic field intensity can influence global climate through the modulation of CR flux.
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Report
(4 results)
Research Products
(51 results)
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[Journal Article] New insights into magnetic enhancement mechanism in Chinese paleosols2013
Author(s)
Yang, T.S., Hyodo, M., Zhang, S.H., Maeda, M., Yang Z.N., Wu, H.C., and Li, H.Y
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Journal Title
Palaeogeography, Plaeoclimatology, Palaeoecology
Volume: 369
Pages: 493-500
DOI
Related Report
Peer Reviewed
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[Journal Article] Reliability of Relative Paleointensity Recorded in Chinese Loess-Paleosol Sediments2012
Author(s)
Yang, T.S., Li, H., Wu, H., Yang, Z.N., Zhang, S.H. and Hyodo, M.
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Journal Title
Acta Geologica Sinica (English Edition)
Volume: 86
Issue: 5
Pages: 1276-1288
DOI
Related Report
Peer Reviewed
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[Journal Article] MIS 21 and the Mid-Pleistocene Climate Transition: Climate and sea-level variation from a sediment core in Osaka Bay, Japan, Palaeogeography2011
Author(s)
Kitaba, I., Harada, M., Hyodo, M., Katoh, S., Sato, H.and Matsushita, M
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Journal Title
Plaeoclimatology, Palaeoecology
Volume: 299
Pages: 227-239
Related Report
Peer Reviewed
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[Presentation] Disruption in climatic rhythm and anomalous cooling during large decreases in geomagnetic field intensity2011
Author(s)
Kitaba, I., Hyodo, M., Katoh, S., Dettman, D. L., Sato, H.and Matsushita,M.
Organizer
2011 AGU Fall Meeting
Place of Presentation
San Francisco, USA
Related Report
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[Presentation] Matuyama-Brunhes polarity transition just overlying the latest Homo erectus and meteorite impact evidence in Sangiran, Java2011
Author(s)
Hyodo, M., Matsu'ura, S., Kamishima, Y., Kondo, M., Takeshita, Y., Kitaba, I., Danhara, T., Aziz, F., Iwan, K. and Kumai, H
Organizer
XVIII INQUA Congress 2011
Place of Presentation
Bern, Switzerland
Related Report
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[Presentation] Climate and sea-level variation during MIS 21 from a sediment core in Osaka Bay, Japan: a sign of termination of the Mid-Pleistocene Climate Transition2010
Author(s)
Kitaba, I., Harada, M., Hyodo, M., Katoh, S., Sato, H.and Matsushita, M
Organizer
2010 AGU Fall meeting, Moscone Convention Center
Place of Presentation
San Francisco, USA
Year and Date
2010-12-17
Related Report
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