Towards better calibration of the modern microfossil data in Osaka Bay, Japan against aquatic and terrestrial environments

• Project/Area Number: 24840028
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Stratigraphy/Paleontology
• Research Institution: Kobe University
• Principal Investigator: KITABA IKUKO 神戸大学, 内海域環境教育研究センター, 助教 (60631710)
• Project Period (FY): 2012-08-31 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000); Fiscal Year 2013: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 定量的古環境復元 / 海洋環境 / 気候 / 珪藻分析 / 花粉分析 / モダンアナログ / 化学分析 / 大阪湾 / 微化石分析 / 海水環境 / 変換関数

Research Abstract

The difficulties in the microfossil-based paleoenvironmental reconstruction in coastal area derive from the relatively complex sedimentary processes. Aiming at establishing the method of reconstructing physical properties (e.g. salinity, water depth, water and atmospheric temperatures and precipitations), we carried out microfossil and chemical analyses of surface sediments as well as seawater observation in Osaka Bay. The diatom assemblage is primarily controlled by the organic matter content, salinity and physical settings of the site. The significant error associated with the quantitative climatic reconstruction using pollen data is attributed to the fact that the pollen assemblage occasionally reflects the non-climatic influence. The accuracy and precision of climatic reconstruction can be improved significantly by enhancing minor taxa.

Research Products

• [Journal Article] 地磁気の減少による寒冷化 (2013)
  • Author(s): 北場育子
  • Journal Title: Isotope News Volume: 711 Pages: 14-19
  • NAID: 10031183019
• [Journal Article] Mid-latitude cooling caused by geomagnetic field minimum during polarity reversal (2013)
  • Author(s): Kitaba I, Hyodo M, Katoh S, Dettman D. L, and Sato H
  • Journal Title: PNAS (Proceedings of the National Academy of Sciences USA) Volume: 110 Pages: 1215-1220
  • Peer Reviewed
• [Journal Article] Mid-latitude cooling caused by geomagnetic field minimum during polarity reversal (2013)
  • Author(s): Kitaba, I., Hyodo, M., Katoh, S., Dettman, D.L. and Sato, H.
  • Journal Title: Proc. Natl Acad. Sci. USA Volume: 110 Issue: 4 Pages: 1215-1220
  • DOI: 10.1073/pnas.1213389110
  • Peer Reviewed
• [Presentation] Major weakening of geomagnetic field causes climatic cooling (2014)
  • Author(s): Kitaba I
  • Organizer: Japanese-French Frontiers of Science (JFFoS) Symposium 2013
  • Place of Presentation: Metz, France (Poster)
  • Invited
• [Presentation] Major weakening of geomagnetic field causes climatic cooling (2014)
  • Author(s): Ikuko Kitaba
  • Organizer: Japanese-French Frontiers of Science (JFFoS) Symposium 2013
  • Place of Presentation: Hotel Mercure Metz Centre (Metz, France)
  • Invited
• [Presentation] Possible Linkage between Geomagnetic Field (2013)
  • Author(s): Kitaba I, Hyodo M, Katoh S, Dettman D. L, and Sato H
  • Organizer: Temperature and Monsoon : Implication of High-Resolution Magnetic and Climatic Data from a Sediment Core in Osaka Bay, Japan, 2013 AGU Fall Meeting
  • Place of Presentation: San Francisco, USA. (Poster)
• [Presentation] 房総半島低方位コアから復元したマツヤマ―ブリュンヌ地磁気逆転― (2013)
  • Author(s): 高崎健太, 岡田誠, 加藤茂弘, 北場育子, 兵頭政幸
  • Organizer: 第134回地球電磁気・地球惑星圏学会
  • Place of Presentation: 高知 (口頭)
• [Presentation] 大阪湾表層堆積物の花粉組成の変動性を決めるもの―海成堆積物を用いた定量的気候復元の高精度化をめざして― (2013)
  • Author(s): 北場育子, 中川毅, McClymont E, Dettman D. L, 兵頭政幸
  • Organizer: 日本第四紀学会2013年大会
  • Place of Presentation: 青森 (口頭)
• [Presentation] 更新世前期・中期境界の磁気―気候層序― (2013)
  • Author(s): 兵頭政幸, 北場育子
  • Organizer: 日本第四紀学会2013年大会
  • Place of Presentation: 青森 (口頭)
• [Presentation] 古生態学的証拠からみた地磁気逆転期の気候変動 (2013)
  • Author(s): 北場育子, 兵頭政幸, 加藤茂弘, Dettman D. l, 佐藤裕司
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張 (口頭)
  • Invited
• [Presentation] 異常な間氷期ステージ19の磁気―気候層序― (2013)
  • Author(s): 兵頭政幸, 北場育子
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張 (口頭)
• [Presentation] 古生態学的証拠からみた地磁気逆転期の気候変動 (2013)
  • Author(s): 北場育子，兵頭政幸，加藤茂弘，David L. Dettman，佐藤裕司
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張メッセ国際会議場（千葉県）
  • Invited
• [Presentation] 異常な間氷期ステージ19の磁気－気候層序 (2013)
  • Author(s): 兵頭政幸，北場育子
  • Organizer: 日本地球惑星科学連合2013年大会
  • Place of Presentation: 幕張メッセ国際会議場（千葉県）
• [Presentation] 大阪湾表層堆積物の花粉組成の変動性を決めるもの―海成堆積物を用いた定量的気候復元の高精度化をめざして― (2013)
  • Author(s): 北場育子，中川毅，Erin McClymont，David L. Dettman, 兵頭政幸
  • Organizer: 日本第四紀学会2013年大会
  • Place of Presentation: 弘前大学（青森県）
• [Presentation] 更新世前期・中期境界の磁気－気候層序 (2013)
  • Author(s): 兵頭政幸，北場育子
  • Organizer: 日本第四紀学会2013年大会
  • Place of Presentation: 弘前大学（青森県）
• [Presentation] 房総半島定方位コアから復元したマツヤマ－ブリュンヌ地磁気逆転 (2013)
  • Author(s): 高崎健太，岡田誠，加藤茂弘，北場育子，兵頭政幸
  • Organizer: 地球電磁気・地球惑星圏学会第134回総会・講演会
  • Place of Presentation: 高知大学（高知県）
• [Presentation] Possible Linkage between Geomagnetic Field, Temperature and Monsoon: Implication of High-Resolution Magnetic and Climatic Data from a Sediment Core in Osaka Bay, Japan (2013)
  • Author(s): Ikuko Kitaba, Masayuki Hyodo, Shigehiro Katoh, David L. Dettman, Hiroshi Sato
  • Organizer: 2013 AGU Fall Meeting
  • Place of Presentation: Moscone Convention Center (San Francisco, USA)
• [Presentation] Paleoenvironment of the Lowest Hominid-bearing Bed in the Sangiran Area (2012)
  • Author(s): Kitaba I, Hyodo M, Matsuura S, Kondo M, Takeshita Y, F Aziz, and Kumai H, , Indonesia
  • Organizer: 2012 AGU Fall Meeting
  • Place of Presentation: San Francisco, USA. (Poster)
• [Presentation] Climate variations and floral changes during the Mid-Pleistocene transition around Osaka Bay, Japan (2012)
  • Author(s): Kitaba I, Hyodo M, Katoh S, Dettman D. L, and Sato H
  • Organizer: East Asia International Workshop on Present Earth Surface Processes and Long-term Environmental Changes in East Asia
  • Place of Presentation: Kobe, Japan (Oral)
• [Presentation] Climate variations and floral changes during the Mid-Pleistocene transition around Osaka Bay, Japan
  • Author(s): Ikuko Kitaba
  • Organizer: East Asia International Workshop on Present Earth Surface Processes and Long-term Environmental Changes in East Asia
  • Place of Presentation: Kobe Maiko Villa (Kobe, Japan)
• [Presentation] Paleoenvironment of the Lowest Hominid-bearing Bed in the Sangiran Area, Indonesia
  • Author(s): Ikuko Kitaba
  • Organizer: 2012 AGU Fall Meeting
  • Place of Presentation: Moscone Convention Center (San Francisco, USA)