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Sea-surface temperature reconstruction in the glacial Japan Sea based on clumped isotopes

Research Project

Project/Area Number 15K13585
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Stratigraphy/Paleontology
Research InstitutionKyushu University

Principal Investigator

OKAZAKI YUSUKE  九州大学, 理学研究院, 准教授 (80426288)

Co-Investigator(Kenkyū-buntansha) 佐川 拓也  金沢大学, 自然システム学系, 助教 (40448395)
Co-Investigator(Renkei-kenkyūsha) NAOHIRO YOSHIDA  東京工業大学, 物質理工学院・応用化学系, 教授 (60174942)
Research Collaborator KYOHEI TANIZAKI  九州大学, 大学院理学府・地球惑星科学専攻
JONAOTARO ONODERA  海洋研究開発機構, 主任研究員
Project Period (FY) 2015-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords日本海 / 最終氷期 / 海表面水温 / 海表面塩分 / 対馬暖流 / 水温 / 塩分 / クランプトアイソトープ / 珪質鞭毛藻 / 表層水温
Outline of Final Research Achievements

In order to reconstruct sea-surface temperature (SST) in the glacial Japan Sea, we have performed clumped-isotopes measurements on planktic foraminiferal tests and silicoflagellate assemblages in marine sediment from the Wakasa Bay in the Japan Sea. As for clumped isotopes, our efforts were focused on improvement of reproducibility. Based on modern analogue tecnic of silicoflagellate assemblage, we have reconstructed SST changes from 30 ka to 5 ka. During glacial period, reconstructed SST was ~5 degree C. Subsequent SST rise was found during deglacial period. Since 12 ka, reconstructed SST was ~14degree C, which was comparable to the modern values. This result suggest that the Tsushima Warm Current has resumed during then.

Report

(3 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • Research Products

    (4 results)

All 2017 2016

All Presentation (4 results) (of which Int'l Joint Research: 1 results)

  • [Presentation] 珪質鞭毛藻群集に基づく最終氷期最盛期以降の 日本海若狭沖における表層水温復元2017

    • Author(s)
      谷﨑恭平, 岡崎裕典, 佐川拓也, 小野寺丈尚太郎
    • Organizer
      日本地球惑星科学連合2017年大会
    • Place of Presentation
      幕張メッセ
    • Year and Date
      2017-05-21
    • Related Report
      2016 Annual Research Report
  • [Presentation] 日本海南部で採取された2本の堆積物コアから復元された千年スケール表層水温変動2016

    • Author(s)
      佐川拓也
    • Organizer
      日本古生物学会2016年年会
    • Place of Presentation
      福井県立大学
    • Year and Date
      2016-06-25
    • Related Report
      2016 Annual Research Report
  • [Presentation] 古気候記録の相互精密対比に向けた高精度な堆積物深度管理手法について2016

    • Author(s)
      鈴木克明,佐川拓也,池原研,中川毅,入野智久,KR15-10 乗船研究者一同
    • Organizer
      日本地球惑星科学連合2016年大会
    • Place of Presentation
      幕張メッセ
    • Year and Date
      2016-05-22
    • Related Report
      2016 Annual Research Report
  • [Presentation] Paleotemperature estimation in a semi-enclosed marginal sea in the East Asia2016

    • Author(s)
      Takuya Sagawa, Naizhong Zhang, Keita Yamada, Naohiro Yoshida
    • Organizer
      5th International Clumped Isotope Workshop
    • Place of Presentation
      St. Petersburg, Florida, USA
    • Year and Date
      2016-01-06
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2018-03-22  

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