Onset and evolution of glacial-interglacial cycles: a rule of North Atlantic Deep Water

• Project/Area Number: 18H03358
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 63010:Environmental dynamic analysis-related
• Research Institution: Kyushu University
• Principal Investigator: HAYASHI Tatsuya 九州大学, 比較社会文化研究院, 助教 (80571132)
• Co-Investigator(Kenkyū-buntansha): 大野 正夫 九州大学, 比較社会文化研究院, 教授 (00251413) ; 桑原 義博 九州大学, 比較社会文化研究院, 教授 (90281196) ; 佐藤 雅彦 東京大学, 大学院理学系研究科(理学部), 助教 (50723277) ; 坂井 三郎 国立研究開発法人海洋研究開発機構, 海洋機能利用部門(生物地球化学センター), 主任研究員 (90359175) ; 佐川 拓也 金沢大学, 地球社会基盤学系, 助教 (40448395)
• Project Period (FY): 2018-04-01 – 2021-03-31
• Project Status: Completed (Fiscal Year 2020)
• Budget Amount: ¥17,550,000 (Direct Cost: ¥13,500,000、Indirect Cost: ¥4,050,000); Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000); Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000); Fiscal Year 2018: ¥11,700,000 (Direct Cost: ¥9,000,000、Indirect Cost: ¥2,700,000)
• Keywords: 氷期－間氷期サイクル / 北半球の氷床化 / 大西洋子午面循環 / 鮮新世後期 / 更新世初期 / 北大西洋 / 大陸氷床 / 氷期ー間氷期サイクル / 鮮新世の後半 / 更新世の初期 / 北大西洋海流 / 北大西洋深層水 / 初期の氷期ー間氷期サイクル / 海洋大循環 / 古気候・古海洋 / 鮮新世の後半ー更新世の前半

Outline of Final Research Achievements

To reveal relationship between the onset of glacial-interglacial cycles around 2.7 million years ago and the Atlantic meridional overturning circulation (AMOC), we performed multi-proxy analyses of deep-sea sediments recovered from the high-latitude North Atlantic. As the results, we found the fact that both the North Atlantic Current (upper limb of the AMOC) and North Atlantic Deep Water (lower limb of the AMOC) were enhanced synchronously with the glacial-interglacial cycles. We hypothesized that the AMOC was actively maintained even in early stages of individual glacials after 2.7 million years ago, which facilitated the efficient growth of continental ice sheets and amplified 41-kyr glacial oscillations.

Academic Significance and Societal Importance of the Research Achievements

本研究では、様々な古環境記録を高解像度で復元することで、初期の氷期－間氷期サイクルと海洋循環の関係について多角的に検証することができた。特に、氷床崩壊と深層水強度の記録は解像度が高く、数百年規模の現象を世界で初めて復元することに成功した。また、深層水に関しては、岩石磁気に基づく新しい分析手法を採用し、有効性を証明した。本研究で取り組んだのは現在まで続く氷期－間氷期サイクルの初期の現象であるため、本研究の成果は現在や近未来の気候変動問題にも貢献する有益な情報を含むものである。

Research Products

• [Journal Article] 炭酸塩の安定同位体レーザー吸収分光法の開拓 (2021)
  • Author(s): 坂井三郎
  • Journal Title: ぶんせき Volume: 2 Pages: 52-56
  • NAID: 40022497821
  • Open Access
• [Journal Article] Influences of temperature and the meteoric water δ18O value on a stalagmite record in the last deglacial to middle Holocene period from southwestern Japan (2021)
  • Author(s): Hirokazu Kato, Shota Amekawa, Masako Hori, Chaun-Chou Shen, Yoshihiro Kuwahara, Ryoko Senda, Akihiro Kano
  • Journal Title: Quaternary Science Reviews Volume: 253 Pages: 106746-106746
  • DOI: 10.1016/j.quascirev.2020.106746
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Diatoms in upper Pliocene–lower Pleistocene sediments, subpolar North Atlantic: 2. <i>Eupyxidicula atlantica</i> sp. nov. (2020)
  • Author(s): Hayashi, T. & Ohno, M.
  • Journal Title: Diatom Volume: 36 Issue: 0 Pages: 35-45
  • DOI: 10.11464/diatom.36.35
  • NAID: 130007957010
  • ISSN: 0911-9310, 2186-8565
  • Year and Date: 2020-12-25
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Latest Pliocene Northern Hemisphere glaciation amplified by intensified Atlantic meridional overturning circulation (2020)
  • Author(s): Hayashi, T., Yamanaka, T., Hikasa, Y., Sato, M., Kuwahara, Y. & Ohno, M.
  • Journal Title: Communications Earth & Environment Volume: 1 Issue: 1 Pages: 1-10
  • DOI: 10.1038/s43247-020-00023-4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Diatoms in upper Pliocene–lower Pleistocene sediments, subpolar North Atlantic: 1. <i>Thalassiothrix antarctica</i> (2019)
  • Author(s): 林 辰弥、大野 正夫
  • Journal Title: Diatom Volume: 35 Issue: 0 Pages: 18-27
  • DOI: 10.11464/diatom.35.18
  • NAID: 130007772850
  • ISSN: 0911-9310, 2186-8565
  • Year and Date: 2019-12-25
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Rapid and Precise Analysis of Carbon Dioxide Clumped Isotopic Composition by Tunable Infrared Laser Differential Spectroscopy (2019)
  • Author(s): Wang Zhennan、Nelson David D.、Dettman David L.、McManus J. Barry、Quade Jay、Huntington Katharine W.、Schauer Andrew J.、Sakai Saburo
  • Journal Title: Analytical Chemistry Volume: 92 Issue: 2 Pages: 2034-2042
  • DOI: 10.1021/acs.analchem.9b04466
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Pulsed terahertz radiation for sensitive quantification of carbonate minerals (2019)
  • Author(s): Sakai, S., Yang, D., Yasuda, T., Akiyama, K., Kuga, T., Kano, A., Shiraishi, F., Amekawa, S., Ohtsuka, S., Nakaguchi, K. & Yamaguchi, S.
  • Journal Title: ACS Omega Volume: 4 Pages: 2702-2707
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Mineral nitrogen isotope signature in clay minerals formed under high ammonium environment conditions in sediment associated with ammonium-rich sediment-hosted hydrothermal system (2018)
  • Author(s): Jo, Jaeguk; Yamanaka, Toshiro; Kashimura, Tomoki; Okunishi, Yusuke; Kuwahara, Yoshihiro; Kadota, Isao; Miyoshi, Youko; Ishibashi, Jun-Ichiro; Chiba, Hitoshi
  • Journal Title: GEOCHEMICAL JOURNAL Volume: 52 Issue: 4 Pages: 317-333
  • DOI: 10.2343/geochemj.2.0518
  • NAID: 130007431360
  • ISSN: 0016-7002, 1880-5973
  • Year and Date: 2018-07-31
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The turnover of continental planktonic diatoms near the middle/late Miocene boundary and their Cenozoic evolution (2018)
  • Author(s): Hayashi, T., Krebs, W.N., Saito-Kato, M. & Tanimura, Y.
  • Journal Title: PLoS ONE Volume: 13 Issue: 6 Pages: 1-25
  • DOI: 10.1371/journal.pone.0198003
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Detailed observation of <i>Actinocyclus krebsii</i> sp. nov. from a lower to middle Miocene lacustrine diatomite, Nagasaki, western Japan (2018)
  • Author(s): Hayashi, T.
  • Journal Title: Diatom Volume: 34 Issue: 0 Pages: 57-67
  • DOI: 10.11464/diatom.34.57
  • NAID: 130007599972
  • ISSN: 0911-9310, 2186-8565
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Presentation] Calibrating the Carbonate Clumped Isotope Thermometer from 7 to 70 °C by Automated Laser Spectroscopy (2020)
  • Author(s): Nitzan, Y., Wang, Z., Dettman, D.L., Quade, J., Huntington, K.W., Schauer, A.J., Nelson, D., McManus, J.B., Sakai, S.
  • Organizer: AGU Fall Meeting, San Francsisco
  • Int'l Joint Research
• [Presentation] MIS G4－G3退氷期の大西洋子午面循環の発達 (2019)
  • Author(s): 林辰弥, 山中寿朗, 日笠友暉, 佐藤雅彦, 桑原義博, 大野正夫
  • Organizer: 第5回地球環境史学会年会
• [Presentation] U1314の岩石磁気・鉱物・珪藻分析結果（AMOCとiNHGの関係） (2019)
  • Author(s): 林辰弥
  • Organizer: U1314研究集会
• [Presentation] Geomagnetic Excursions between 2.1 and 2.9 Ma at IODP Site U1314 in the North Atlantic (2019)
  • Author(s): Masao Ohno, Tatsuya Hayashi
  • Organizer: Asia Oceania Geosciences Society
  • Int'l Joint Research
• [Presentation] 北半球大陸氷床の発達と海洋循環の関係 (2019)
  • Author(s): 林辰弥，佐藤雅彦，桑原義博，上原亮，大野正夫
  • Organizer: MRC研究集会
• [Presentation] MIS 95 以前の氷期－間氷期サイクル (2018)
  • Author(s): 林辰弥，佐藤雅彦，桑原義博，上原亮，槙尾雅人，大野正夫
  • Organizer: 地球環境史学会
• [Presentation] ネパールヒマラヤ・カトマンズ盆地堆積物の粘土鉱物分析によるインドモンスーン変動の復元 (2018)
  • Author(s): 丁斐，桑原義博，酒井治孝，林辰弥，藤井理恵，槙尾雅人
  • Organizer: 2018年度第62回日本粘土学会粘土科学討論会
• [Presentation] ガーダードリフト堆積物から復元した後期鮮新世-前期更新世の北大西洋 表層海水温変動 (2018)
  • Author(s): 日笠友暉，山中寿朗，千葉仁，林辰弥，大野正夫
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] 北大西洋深層水は北半球氷床化に関与したのか? (2018)
  • Author(s): 林辰弥，大野正夫，佐藤雅彦，日笠友暉，山中寿朗，槙尾雅人，桑原義博
  • Organizer: 日本地球惑星科学連合2018年大会
  • Invited
• [Remarks] ＜研究成果＞ 氷期－間氷期サイクルの誕生と初期進化：北大西洋深層水の役割に関する新仮説の検証
  • URL: https://isgs.kyushu-u.ac.jp/research_topics/view.php?page=0&searchText=&researchId=24
• [Patent(Industrial Property Rights)] ガス分析用前処理装置 (2021)
  • Inventor(s): 坂井三郎
  • Industrial Property Rights Holder: 坂井三郎
  • Industrial Property Rights Type: 特許
  • Filing Date: 2021
  • Acquisition Date: 2021
• [Patent(Industrial Property Rights)] Processing apparatus for gas analyses (2020)
  • Inventor(s): Saburo Sakai
  • Industrial Property Rights Holder: Saburo Sakai
  • Industrial Property Rights Type: 特許
  • Filing Date: 2020
  • Acquisition Date: 2020
  • Overseas