Geomagnetic disturbance at the dawn of the Quaternary

2009 Fiscal Year Final Research Report

• Project/Area Number: 19340151
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Geology
• Research Institution: Kobe University
• Principal Investigator: HYODO Masayuki Kobe University, 内海域環境教育研究センター, 教授 (60183919)
• Co-Investigator(Kenkyū-buntansha): KTOH Shigehiro 兵庫県立人と自然の博物館, 自然・環境評価部門, 主任研究員 (50301809) ; MISHIMA Toshiaki 神戸大学, 内海域環境教育研究センター, 学術研究員 (50448396)
• Co-Investigator(Renkei-kenkyūsha): MATSUSHITA Mariko 独立行政法人文化財研究所, 奈良文化財研究所, 客員研究員 (50110804) ; ITOTA Chizu 太成学院大学, 人間学部, 教授 (80246800)
• Project Period (FY): 2007 – 2009
• Keywords: 第四紀 / 地磁気逆転 / 古気候 / 寒冷化

Research Abstract

Detailed paleomagnetic variations from loess reveal the Gauss-Matuyama (G-M) polarity transition accompanies geomagnetic disturbance with > 20 rapid polarity flips. The G-M transition is recorded in the loess layer that lies just below the Quaternary and just above the Red Clay layer, and is characterized by a cold-dry climate with the strongest winter monsoon in the Plio-Pleistocene. The coincidence of the geomagnetic disturbance and the super cold-dry climate just before the start of the Quaternary suggests a link between geomagnetic field and climate. Similar multiple polarity flips are observed in the Upper-Olduvai and Matuyama-Brunhes polarity transition.

Research Products

• [Journal Article] Multiple rapid polarity swings during the Matuyama-Brunhes (M-B) transition from two high-resolution loess-paleosol records (2010)
  • Author(s): Yang, T., Hyodo, M., Yang, Z.N., Li H.D., Maeda, M.
  • Journal Title: J. Geophys. Res. 115 Pages: B05101
  • Peer Reviewed
• [Journal Article] High-resolution climate stratigraphy across the Matuyama-Brunhes transition from palynological data of Osaka Bay sediments in southwestern Japan (2009)
  • Author(s): Kitaba, I., Iwabe, C., Hyodo, M., Katoh, S., Matsushita, M.
  • Journal Title: Palaeogeography, Plaeoclimatology, Palaeoecology 272 Pages: 115-123
  • Peer Reviewed
• [Journal Article] Latest Olduvai short-lived reversal episodes recorded in Chinese loess (2008)
  • Author(s): Yang, T.S., Hyodo, M., Yang, Z.N., Ding, L., Li H.D., Fu, J.L., Wang, S.B., Wang, H.W., Mishima, T.
  • Journal Title: J. Geophys. Res. 113 Pages: B05103
  • Peer Reviewed
• [Journal Article] Terrestrial records of the latest Gauss cooling event in Japan and north central China (2007)
  • Author(s): Hyodo, M.
  • Journal Title: The Quaternary Research 46,3 Pages: 215-222
  • Peer Reviewed
• [Journal Article] Early and middle Matuyama geomagnetic excursions recorded in the Chinese loess-paleosol sediments (2007)
  • Author(s): Yang, T.S., Hyodo, M., Yang, Z.N., Ding, L., Fu, J.L., Mishima, T.
  • Journal Title: Earth Planets Space 59 Pages: 825-840
  • Peer Reviewed
• [Presentation] 中国LingtaiレスセクションにおけるGauss-Matuyama地磁気逆転記録の予察的報告 (2009)
  • Author(s): 三島稔明, 兵頭政幸, 谷川晃一朗, 石田拓也, 加藤茂弘, 楊天水, Li Huidi, 楊振宇
  • Organizer: 地球電磁気・地球惑星圏学会第126回講演会
  • Place of Presentation: 石川
  • Year and Date: 20090927-20090930
• [Presentation] A geomagnetic record of the Gauss-Matuyama polarity transition recovered from an Osaka Bay sediment core (2009)
  • Author(s): 三島稔明, 兵頭政幸, 松下まり子, 加藤茂弘
  • Organizer: 日本地球惑星科学連合2009年大会
  • Place of Presentation: 幕張
  • Year and Date: 20090516-20090521
• [Presentation] Temperature and precipitation changes across the Matuyama-Brunhes geomagnetic polarity reversal. (2008)
  • Author(s): Hyodo, M.
  • Organizer: International Workshop on Variabilities of Solar-Cosmic and Terrestrial Environment
  • Place of Presentation: Yokohama, Japan(Invited)
  • Year and Date: 20081204-20081206
• [Presentation] Vegetation and climate changes during the last geomagnetic reversal. (2008)
  • Author(s): Kitaba, I., Hyodo, M., Katoh, S. Matsushita, M.
  • Organizer: International Workshop on Variabilities of Solar-Cosmic and Terrestrial Environment
  • Place of Presentation: Yokohama, Japan
  • Year and Date: 20081204-20081206
• [Presentation] Multiple rapid polarity swings during the Matuyama-Brunhes (M-B) transition from two high-resolution loess-paleosol records. (2008)
  • Author(s): Yang, T., Hyodo, M., Yang, Z., Li, H. Maeda, M.
  • Organizer: 33rd International Geological Congress
  • Place of Presentation: Oslo, Norway
  • Year and Date: 20080806-20080814
• [Presentation] Matsushita, Vegetation change associated with the stage 19 transgression around Osaka Bay, southwestern Japan (2007)
  • Author(s): Kitaba, I., C. Iwabe, M. Hyodo, S. Kato, M.
  • Organizer: International Symposium on Quaternary Environmental Changes and Humans in Asia and the Western Pacific
  • Place of Presentation: Tukuba, Japan
  • Year and Date: 20071219-20071222
• [Presentation] Multiple virtual polarity boundaries in the Matuyama-Brunhes transition in East and Southeast Asia (2007)
  • Author(s): Hyodo, M., T. Yang
  • Organizer: International Symposium on Quaternary Environmental Changes and Humans in Asia and the Western Pacific
  • Place of Presentation: Tukuba, Japan(Invited)
  • Year and Date: 20071219-20071222
• [Presentation] 中国レスに記録されたマツヤマ初期・中期の地磁気エクスカーション (2007)
  • Author(s): 楊天水, 兵頭政幸, 楊振宇, 丁林, 傳建利, 三島稔明
  • Organizer: 日本第四紀学会2007年大会
  • Place of Presentation: 神戸
  • Year and Date: 20070831-20070902
• [Book] 古地磁気層序学
  • Author(s): 兵頭政幸
  • Publisher: 日本第四紀学会編