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Dynamics and roles of North Pacific Subtropical Mode Water during the glacial-interglacial period

Research Project

Project/Area Number 19H04251
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 63010:Environmental dynamic analysis-related
Research InstitutionTohoku University

Principal Investigator

Takayanagi Hideko  東北大学, 理学研究科, 准教授 (40729208)

Co-Investigator(Kenkyū-buntansha) 井龍 康文  東北大学, 理学研究科, 教授 (00250671)
横山 祐典  東京大学, 大気海洋研究所, 教授 (10359648)
若木 仁美  高知大学, 海洋コア総合研究センター, 短期研究員 (20817043)
石川 剛志  国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(高知コア研究所), 研究所長代理 (30270979)
板木 拓也  国立研究開発法人産業技術総合研究所, 地質調査総合センター, 研究グループ長 (30509724)
若木 重行  国立研究開発法人海洋研究開発機構, 超先鋭研究開発部門(高知コア研究所), 副主任研究員 (50548188)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2021: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Fiscal Year 2020: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2019: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
Keywords北太平洋亜熱帯モード水 / 氷期 / 間氷期 / 琉球列島 / 腕足動物 / 炭素同位体比 / 酸素同位体比 / 古海洋環境復元
Outline of Research at the Start

地球表層における長期的なフィードバック機構の理解において,海洋の位置づけは重要である.しかし,海洋中層域の水塊に関する知見は少なく,それらが数十年~数千年スケールの気候変動・物質循環にどのような役割を果たしているのか?について十分に理解されていない.本研究では,北西太平洋中緯度に分布する北太平洋亜熱帯モード水に注目し,琉球列島周辺に分布する堆積物および含有化石の化石群集および地球化学データから,過去約2万年間の亜熱帯モード水の分布および物理・化学的性質の時間変化を明らかにする.そして,それらが熱・炭素・栄養塩の循環に与える影響を見積もり,気候・物質循環における亜熱帯モード水の役割を評価する.

Outline of Final Research Achievements

This study focused on the North Pacific Subtropical Mode Water (NPSMW) distributed in the mid-latitudes of the Northwest Pacific Ocean, and investigated the temporal changes in the physical and chemical properties of the subtropical mode water over the past 30,000 years (from the last glacial period to the present) based on geochemical data of the brachiopod Basiliola lucida in surface sediments distributed around the Ryukyu Islands. The results indicate that the temperature of the NPSMW remained constant between the Last Glacial Maximum and the present, while the total carbonate content of the NPSMW showed an increasing trend. This suggests that the subtropical mode water might play a role as a negative feedback system against climate change.

Academic Significance and Societal Importance of the Research Achievements

本研究は,亜熱帯モード水が「移流する」という性質を活かし,従来とは異なるアプローチで最終氷期から現在のモード水の水温および全炭酸の時間変化の復元を行った.その結果,過去の亜熱帯モード水の動態を詳細にかつ再現性高く復元することができ,同亜熱帯モード水が気候変動に対して負のフィードバック機構として作用していることを実データから示唆することができた.本成果は,北西太平洋の亜表層(水温躍層を含む)におけるデータの空白域補う役目も果たし海洋の動態を様々な時間スケールで理解するという観点で,学術的・社会的意義が高い.

Report

(4 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • Research Products

    (22 results)

All 2022 2021 2020 2019

All Journal Article (7 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 5 results) Presentation (15 results) (of which Int'l Joint Research: 5 results,  Invited: 1 results)

  • [Journal Article] Characterization of water masses around the southern Ryukyu Islands based on isotopic compositions2022

    • Author(s)
      Cruz Salmeron Andros Daniel、Takayanagi Hideko、Wakaki Shigeyuki、Ishikawa Tsuyoshi、Miyajima Toshihiro、Wakaki Hitomi、Itaki Takuya、Iryu Yasufumi
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 9 Issue: 1 Pages: 44-44

    • DOI

      10.1186/s40645-022-00503-5

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The pteropod species Heliconoides inflatus as an archive of late Pleistocene to Holocene environmental conditions on the Northwest Shelf of Australia2022

    • Author(s)
      Hallenberger Maximilian、Reuning Lars、Takayanagi Hideko、Iryu Yasufumi、Keul Nina、Ishiwa Takeshige、Yokoyama Yusuke
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 9 Issue: 1 Pages: 49-49

    • DOI

      10.1186/s40645-022-00507-1

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Spathian to Aegean (upper Lower Triassic to lower Middle Triassic) carbon isotope stratigraphy constrained by the conodont biostratigraphy of carbonates on top of a midoceanic seamount formed in the Panthalassic Ocean2021

    • Author(s)
      Thuy Thi Nhu Ha, Takumi Maekawa, Hideko Takayanagi, Yasufumi Iryu
    • Journal Title

      Island Arc

      Volume: 30

    • Related Report
      2020 Annual Research Report
  • [Journal Article] The δ13C-δ18O variations in marble in the Hida Belt, Japan2021

    • Author(s)
      Hironobu Harada, Tatsuki Tsujimori, Keitaro Kunugiza, Katsuyuki Yamashita, Shogo Aoki, Kazumasa Aoki, Hideko Takayanagi, Yasufumi Iryu
    • Journal Title

      Island Arc

      Volume: 30

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Tectonic implications of carbonate deposits on the eastern slope of the Hahajima Seamount in the collision zone between the Izu?Bonin Arc on the Philippine Sea Plate and the Ogasawara Plateau on the Pacific Plate2020

    • Author(s)
      Miyata Jun、Takayanagi Hideko、Ishigaki Akimasa、Hirano Naoto、Shiokawa Satoshi、Nishimura Akira、Nakazawa Tsutomu、Ishikawa Tsuyoshi、Nagaishi Kazuya、Tokuyama Hidekazu、Ishiwatari Akira、Iryu Yasufumi
    • Journal Title

      Island Arc

      Volume: 29 Issue: 1

    • DOI

      10.1111/iar.12368

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Boring bivalve traces in modern reef and deeper-water macroid and rhodolith beds2020

    • Author(s)
      Bassi Davide、Braga Juan C.、Owada Masato、Aguirre Julio、Lipps Jere H.、Takayanagi Hideko、Iryu Yasufumi
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 7 Issue: 1 Pages: 1-17

    • DOI

      10.1186/s40645-020-00356-w

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] arbon and oxygen isotope records of Tridacna squamosa shells from two different latitudes in the Ryukyu Islands.2020

    • Author(s)
      Kodama, S., Takayanagi, H., Yoshii, K., Ha, T.T.N, Asami, R., Abe, O. and Iryu, Y.
    • Journal Title

      Paleontological Research

      Volume: - Issue: 2 Pages: 79-92

    • DOI

      10.2517/2020pr003

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] High-resolution minor element concentration records in modern brachiopod Pictothyris picta shells and their controlling mechanisms2022

    • Author(s)
      Kazuma Oikawa, Hideko Takayanagi, Ryuichi Shinjo, Kazuyoshi Endo, Masa-aki Yoshida, Yasufumi Iryu
    • Organizer
      Earth, Sea and Sky VII: International Joint Graduate Program Workshop in Earth and Environmental Sciences
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Characterization of water masses around the southern Ryukyu Islands based on Nd isotope composition of benthic foraminifers and H and O isotope compositions of seawater2022

    • Author(s)
      Andros Daniel Cruz Salmeron, Hideko Takayanagi, Shigeyuki Wakaki, Hitomi Uchimura Wakaki, Takuya Itaki, Tsuyoshi Ishikawa, Yasufumi Iryu
    • Organizer
      Earth, Sea and Sky VII: International Joint Graduate Program Workshop in Earth and Environmental Sciences
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Glacial-interglacial variations in the Leeuwin Current for the last 50,000 years based on Nd isotope records of benthic foraminifers2022

    • Author(s)
      Ryota Wako, Hideko Takayanagi, Shigeyuki Wakaki, Yuna Kimoto, Azumi Kuroyanagi, Takeshige Ishita, Yusuke Yokoyama, Hitomi Wakaki, Tsuyoshi Ishikawa, Yasufumi Iryu
    • Organizer
      Earth, Sea and Sky VII: International Joint Graduate Program Workshop in Earth and Environmental Sciences
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 三畳系田穂層の田穂川部層に記録された 上部オレネキアン階~下部アニシアン階にかけての安定炭素同位体比層序2021

    • Author(s)
      HA, Thuy Thi Nhu、前川 匠、高柳栄子、井龍 康文
    • Organizer
      日本古生物学会第 170 回例会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Carbon, oxygen and neodymium isotope characterization of recent benthic foraminifers around Okinawa-jima, southwestern Japan2020

    • Author(s)
      Andros Daniel Cruz Salmeron、Hideko Takayanagi、Shigeyuki Wakaki、Hitomi Uchimura Wakaki、Takuya Itaki、Tsuyoshi Ishikawa、Yasufumi Iryu
    • Organizer
      JpGU-AGU Joint Meeting 2021
    • Related Report
      2020 Annual Research Report
  • [Presentation] 蛇紋岩に伴う炭酸塩岩の安定同位体地球化学:糸魚川-青海地域の累帯組織を示す方解石岩酸素・炭素同位体組成キャラクタリゼーション2020

    • Author(s)
      古俣 利明、辻森 樹、高柳 栄子、井龍 康文
    • Organizer
      JpGU-AGU Joint Meeting 2021
    • Related Report
      2020 Annual Research Report
  • [Presentation] Mass transport during carbonate-silicate rock interaction in a collisional orogen: C-O-Sr isotope study of drill core samples from the Hida Belt, Japan2020

    • Author(s)
      原田 浩伸、辻森 樹、椚座 圭太郎、山下 勝行、高柳 栄子、井龍 康文
    • Organizer
      JpGU-AGU Joint Meeting 2021
    • Related Report
      2020 Annual Research Report
  • [Presentation] Chemostratigraphy and paleoenvironmental reconstruction of the Ediacaran-Cambrian section in Khubsugul Group, northern Mongolia2020

    • Author(s)
      大澤 果那、大路 樹生、高柳 栄子、Pedro Marenco、三村 耕一、Sersmaa Gonchigdorj、小野寺 香乃
    • Organizer
      JpGU-AGU Joint Meeting 2021
    • Related Report
      2020 Annual Research Report
  • [Presentation] Variations in carbon and oxygen isotope composition and trace element concentrations of the modern brachiopod shells collected off Okinoshima2020

    • Author(s)
      及川 一真、高柳 栄子、新城 竜一、遠藤 一佳、吉田 真明、井龍 康文
    • Organizer
      JpGU-AGU Joint Meeting 2021
    • Related Report
      2020 Annual Research Report
  • [Presentation] Intraspecific and gender variations in carbon and oxygen isotope composition of modern brachiopod shells collected off Okinoshima2020

    • Author(s)
      Oikawa, K., Takayanagi, H., Endo, K., Yoshida, M., Iryu, Y.
    • Organizer
      The 169th Regular Meeting The Palaeontological Society of Japan
    • Related Report
      2019 Annual Research Report
  • [Presentation] Trace element concentrations of sub-tropical modern brachiopod Basiliola lucida collected off Okinawa-jima, Japan2019

    • Author(s)
      Takayanagi, H., Tochigi, T., Asami, R., Shinjo, R., Itaki, T., Iryu, Y.
    • Organizer
      JpGU 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Inter-specific variations in trace element concentrations of modern brachiopod shells collected from Otsuchi Bay, Japan2019

    • Author(s)
      Nishio, T., Takayanagi, H., Asami, R., Shinjo, R., Yamamoto, K., Iryu, Y.
    • Organizer
      JpGU 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] New insights into Quaternary paleoceanography in the eastern Indian Ocean2019

    • Author(s)
      Takayanagi, H., Wakaki, S., Ishikawa, T., and Iryu, Y.
    • Organizer
      The International Joint Graduate Program in Earth and Environmental Sciences, Tohoku University (GP-EES) and JSPS-DFG Japanese-German Graduate Externship for Research on Deep Earth Volatile Cycle
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Oxygen isotope ratio of fossil Crenomytilus grayanus from the lower Miocene Akeyo Formation of the Mizunami Group2019

    • Author(s)
      Nakamura, W., Oji, T., Hayashi, S., Ando, Y., Takayanagi, H., and Iryu, Y.
    • Organizer
      The 2019 Annual Meeting, The Palaeontological Society of Japan
    • Related Report
      2019 Annual Research Report
  • [Presentation] Sclerochronology and stable isotope records (δ18O) of Lower Jurassic lithiotid bivalves from the Trento Platform (Southern Alps, Italy)2019

    • Author(s)
      Brandolese, V., Takayanagi, H., Bassi, D., Ha, T. T. N., Iryu, Y., Posenato, R.
    • Organizer
      5th International Sclerochronology Conference
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research

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Published: 2019-04-18   Modified: 2024-01-30  

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