Seasonal temperature variability and the timing of the initial Antarctic glaciation across the climate jump at the Eocene/Oligocene boundary

• Project/Area Number: 16H04070
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Waseda University
• Principal Investigator: Moriya Kazuyoshi 早稲田大学, 教育・総合科学学術院, 准教授 (60447662)
• Co-Investigator(Kenkyū-buntansha): 山本 正伸 北海道大学, 地球環境科学研究院, 准教授 (60332475) ; 石村 豊穂 茨城工業高等専門学校, 国際創造工学科, 准教授 (80422012)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Project Status: Completed (Fiscal Year 2019)
• Budget Amount: ¥17,810,000 (Direct Cost: ¥13,700,000、Indirect Cost: ¥4,110,000); Fiscal Year 2018: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000); Fiscal Year 2017: ¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000); Fiscal Year 2016: ¥7,670,000 (Direct Cost: ¥5,900,000、Indirect Cost: ¥1,770,000)
• Keywords: 古海洋学 / 海水温季節変動 / 気候ジャンプ / 始新世／漸新世 / 地球化学 / 有孔虫 / 炭素・酸素同位体比 / 古水温 / 始新世／漸新世境界 / 古海洋 / 氷床

Outline of Final Research Achievements

We described average sea water temperature, seasonal variability in sea water temperature, and timing of the onset of the Antarctic glaciation across the Eocene/Oligocene transition. We utilized sediments obtained by the Integrated Ocean Drilling Program, Expedition 342 at off Newfoundland, Canada. Carbon and Oxygen isotope ratios of selected planktic foraminifers recovered from the sediments of the late Eocene through early Oligocene in age were analyzed. In addition to these isotope analyses, organic molecules extracted from these sediments were also analyzed on high performance liquid chromatography to identify TEX86 temperature.

Academic Significance and Societal Importance of the Research Achievements

現在の地球は，南極およびグリーンランドに大陸氷床が存在する部分凍結状態にあるが，恐竜が陸上を闊歩していた白亜紀には大陸氷床が存在しない無氷床状態にあった．この無氷床状態から部分凍結状態への気候ジャンプは，始新世／漸新世境界に生じたことが知られている．しかし，その際の詳細な気候状態は，数値実験から予測されるのみで，データによる裏付けが不十分な状態であった．本研究では，これに対し，気候ジャンプ時における平均的海水温，海水温の季節変動幅，および氷床量の時系列変動をこれまでにない時間解像度で明らかにすることに成功した．

Research Products

• [Int'l Joint Research] サウサンプトン大学(英国)
• [Int'l Joint Research] ストックホルム大学(スウェーデン)
• [Int'l Joint Research] ハイデルベルグ大学(ドイツ)
• [Int'l Joint Research] ストックホルム大学(スウェーデン)
• [Int'l Joint Research] サウサンプトン大学(英国)
• [Journal Article] Effect of nutritional condition on photosymbiotic consortium of cultured Globigerinoides sacculifer (Rhizaria, Foraminifera) (2018)
  • Author(s): Takagi Haruka、Kimoto Katsunori、Fujiki Tetsuichi、Moriya Kazuyoshi
  • Journal Title: Symbiosis Volume: 印刷中 Issue: 1 Pages: 25-39
  • DOI: 10.1007/s13199-017-0530-3
  • Peer Reviewed / Open Access
• [Journal Article] Earth’s sea surface environment in the late Mesozoic greenhouse interval (2017)
  • Author(s): 守屋和佳
  • Journal Title: Fossils Volume: 102 Issue: 0 Pages: 31-42
  • DOI: 10.14825/kaseki.102.0_31
  • NAID: 130007623355
  • ISSN: 0022-9202, 2424-2632
  • Year and Date: 2017-09-30
  • Peer Reviewed / Open Access
• [Journal Article] Fossil specimens in conjunction with development of city Tokyo –Mizuhopecten tokyoensis occurred in Tokyo– (2017)
  • Author(s): 守屋和佳
  • Journal Title: Fossils Volume: 102 Issue: 0 Pages: 1-2
  • DOI: 10.14825/kaseki.102.0_1
  • NAID: 130007623280
  • ISSN: 0022-9202, 2424-2632
  • Year and Date: 2017-09-30
  • Peer Reviewed / Open Access
• [Journal Article] Late Maastrichtian carbon isotope stratigraphy and cyclostratigraphy of the Newfoundland Margin (Site U1403, IODP Leg 342) (2017)
  • Author(s): Batenburg, S. J., Friedrich, O., Moriya, K., Voigt, S., Cournede, C., Moebius, I., Blum, P., Bornemann, A., Fiebig, J., Hasegawa, T., Hull, P. M., Norris, R. D., Rohl, U., Sexton, P. F., Westerhold, T., Wilson P. A. and the IODP Expedition 342 Scientists
  • Journal Title: Newsletters on Stratigraphy Volume: 51 Issue: 2 Pages: 245-260
  • DOI: 10.1127/nos/2017/0398
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Maastrichtian carbon isotope stratigraphy and cyclostratigraphy of the Newfoundland Margin (Site U1403, IODP Leg 342) (2016)
  • Author(s): Friedrich, O., Batenburg, S. J., Moriya, K., Voigt, S., Cournede, C., Mobius, I., Blum, P., Bornemann, A., Fiebig, J., Hasegawa, T., Hull, P. M., Norris, R. D., Rohl, U., Westerhold, T., Wilson, P. A., and IODP Expedition 342 Scientists
  • Journal Title: Climate of the Past, Discussion Volume: － Pages: 1-21
  • DOI: 10.5194/cp-2016-51
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Individual migration pathways of modern planktic foraminifers: Chamber-by-chamber assessment of stable isotopes (2016)
  • Author(s): Haruka Takagi, Kazuyoshi Moriya, Toyoho Ishimura, Atsushi Suzuki, Hodaka Kawahata, Hiromichi Hirano
  • Journal Title: Paleontological Research Volume: 印刷中 Issue: 3 Pages: 268-284
  • DOI: 10.2517/2015pr036
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Ontogenetic dynamics of photosymbiosis in cultured planktic foraminifers revealed by fast repetition rate fluorometry (2016)
  • Author(s): Haruka Takagi, Katsunori Kimoto, Tetsuichi Fujiki, Atsushi Kurasawa, Kazuyoshi Moriya, Hiromichi Hirano
  • Journal Title: Marine Micropaleontology Volume: 122 Pages: 44-52
  • DOI: 10.1016/j.marmicro.2015.10.003
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Data report: relative abundance of benthic foraminiferal morphotypes across the Eocene/Oligocene and Oligocene/Miocene boundaries (IODP Expedition 342 Site U1406, North Atlantic). (2016)
  • Author(s): Moriya, K., and Friedrich, O.
  • Journal Title: Proceedings of the Integrated Ocean Drilling Program Volume: 342
  • DOI: 10.2204/iodp.proc.342.204.2016
  • Peer Reviewed / Open Access
• [Presentation] Estimating a growth rate and habitat of the upper Cretaceous Eutrephoceras (Nautilidae, Cephalopoda) with stable isotope records (2018)
  • Author(s): Kazuyoshi Moriya, Kotaro Shirai, Kaoru Kubota, Naoko Sugihara and Kazushige Tanabe
  • Organizer: 5th International Palaeontological Congress
  • Int'l Joint Research
• [Presentation] Assessment of sea surface temperature range in the Eocene with individual planktic foraminiferal isotope analyses (2018)
  • Author(s): Kazuyoshi Moriya, Toyoho Ishimura, and Paul A. Wilson
  • Organizer: International Symposium on Foraminifera 2018
  • Int'l Joint Research
• [Presentation] 中生代におけるアンモナイト類の生活様式の進化 (2018)
  • Author(s): 守屋和佳
  • Organizer: 日本地質学会第125年学術大会
  • Invited
• [Presentation] カナダ太平洋沿岸に分布する上部カンパニアンからマーストリヒチアン階に関する有機地球化学的特徴 (2018)
  • Author(s): 吉田亞理紗・長谷川 卓・後藤晶子・岩瀬優也・守屋和佳・Jim Haggart
  • Organizer: 日本古生物学会2018年年会
• [Presentation] 続成作用によりアンモナイト類の殻室内に沈殿したカルサイトの累帯構造 (2018)
  • Author(s): 小布施 彰太・守屋和佳
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] 始新世の温暖化イベント時における光共生性浮遊性有孔虫の動態 (2018)
  • Author(s): 内藤 陸・高木悠花・守屋和佳
  • Organizer: 日本古生物学会第167回例会
• [Presentation] Evolution of ecology and habitat of the Mesozoic ammonoids (2017)
  • Author(s): Kazuyoshi Moriya
  • Organizer: GCP 630 Meeting in Japan, 2017
  • Int'l Joint Research
• [Presentation] 始新世の温暖化イベント時における光共生性浮遊性有孔虫の動態 (2017)
  • Author(s): 内藤 陸・守屋和佳
  • Organizer: 日本地球惑星科学連合2017年大会
• [Presentation] 殻体の炭素・酸素同位体比分析から探るアンモナイト類の生息域の進化 (2017)
  • Author(s): 守屋和佳
  • Organizer: 日本古生物学会第166回例会シンポジウム
• [Presentation] 殻体の炭素・酸素同位体比分析から探るアンモナイト類の生息域の進化 (2017)
  • Author(s): 守屋和佳
  • Organizer: 日本古生物学会第166回例会
• [Presentation] Thermal structure and ocean circulation in the late Cretaceous Northwestern Pacific (2016)
  • Author(s): Moriya, K.
  • Organizer: Workshop for Cretaceous Climate
  • Int'l Joint Research
• [Presentation] Morphological plasticity and coiling ratio of the planktic foraminifer Muricohedbergella delrioensis across the mid-Cenomanian (2016)
  • Author(s): Moriya, K., Wilson, P.A., Friedrich, O., Erbacher, J., and Takahashi, E.
  • Organizer: International Conference on Paleoceanography
  • Int'l Joint Research
• [Presentation] 過去2億年間でもっとも温暖であった時代・白亜紀の海水温と海洋循環 (2016)
  • Author(s): 守屋和佳
  • Organizer: 地球環境史学会2016年年会
• [Presentation] 白亜紀中期セノマニアン期の浮遊性有孔虫（Muricohedbergella delrioensis）の成長と古海洋環境変動 (2016)
  • Author(s): 高橋恵里・守屋和佳
  • Organizer: 日本地球惑星科学連合2016年大会
• [Remarks] 早稲田大学 進化古生物学研究室 守屋研究室
  • URL: http://www.waseda.jp/sem-paleobiology/index.html