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Assessing the impact of melting of the Totten Glacier in East Antarctica influenced with warm water mass influx during the Holocene

Research Project

Project/Area Number 21H01201
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 17050:Biogeosciences-related
Research InstitutionNational Institute of Advanced Industrial Science and Technology

Principal Investigator

Itaki Takuya  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)

Co-Investigator(Kenkyū-buntansha) 関 宰  北海道大学, 低温科学研究所, 准教授 (30374648)
中山 佳洋  北海道大学, 低温科学研究所, 助教 (30840201)
井尻 暁  神戸大学, 海事科学研究科, 准教授 (70374212)
菅沼 悠介  国立極地研究所, 先端研究推進系, 教授 (70431898)
池原 実  高知大学, 教育研究部自然科学系理工学部門, 教授 (90335919)
Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥17,420,000 (Direct Cost: ¥13,400,000、Indirect Cost: ¥4,020,000)
Fiscal Year 2023: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2022: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2021: ¥8,320,000 (Direct Cost: ¥6,400,000、Indirect Cost: ¥1,920,000)
Keywords古海洋環境 / 氷床 / 南極 / 南極海 / 氷河 / 温暖化 / 古環境 / 古海洋学 / トッテン氷河
Outline of Research at the Start

第61次日本南極地域観測では、2019年11月から2020年3月に砕氷船「しらせ」を用いた採泥調査が実施され、世界に先駆けて東南極トッテン氷河の前縁域から海底コアが採取された。本研究では、これらの海底コアの解析から過去の気候変動によって引き起こされた氷河融解の影響を明らかにする。

Outline of Final Research Achievements

Multi-proxy analysis (sedimentary facies analysis, microfossils, 10Be/9Be ratios, biomarkers, etc.) of sediment cores from the continental shelf at the frontal margin of the Totten Glacier, East Antarctica, was used to discuss the Holocene Totten Ice Sheet retreat process. The results indicate that the retreat of the ice shelf occurred approximately 11-9 thousand years ago near the central continental shelf and 6-4 thousand years ago near the glacial fore-edge. The Totten ice sheet retreat, which lasted until the end of the Middle Holocene, is one of the youngest records ever reported from other regions.

Academic Significance and Societal Importance of the Research Achievements

近年、南極では外洋の温暖な深層水が棚氷の下面に入り込むことで棚氷の融解/氷床の海への流出の原因となっていることが示されており、巨大氷冠を有する東南極ではトッテン氷河の融解にともなう海水準上昇が懸念されている。本研究では、トッテン氷河が完新世にかけて2回の後退時期があったことを示し、氷床後退メカニズムの解明には棚氷下への温暖深層水移入と合わせて海底地形も重要な要素として考慮する必要があることを提案した。このメカニズムは、今後の氷床融解を考える上でも重要な示唆となる。

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • Research Products

    (10 results)

All 2024 2023 2022

All Journal Article (6 results) (of which Int'l Joint Research: 6 results,  Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results) Book (1 results)

  • [Journal Article] Multiproxy approach to characterize the sedimentary process of Cape Darnley Bottom Water flow through the Wild Canyon, East Antarctica2024

    • Author(s)
      Keiko Takehara, Minoru Ikehara, Go-Ichiro Uramoto, Naohisa Nishida, Takayuki Omori, Atsuko Amano, Yusuke Suganuma, Takuya Itaki
    • Journal Title

      Marine Geology

      Volume: 470 Pages: 107269-107269

    • DOI

      10.1016/j.margeo.2024.107269

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Radiolarian assemblages related to the ocean?ice interaction around the East Antarctic coast2024

    • Author(s)
      Iizuka Mutsumi、Itaki Takuya、Seki Osamu、Makabe Ryosuke、Ojima Motoha、Aoki Shigeru
    • Journal Title

      Journal of Micropalaeontology

      Volume: 43 Issue: 1 Pages: 37-53

    • DOI

      10.5194/jm-43-37-2024

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On-shelf circulation of warm water toward the Totten Ice Shelf in East Antarctica2023

    • Author(s)
      Hirano Daisuke、Tamura Takeshi、Kusahara Kazuya、Fujii Masakazu、Yamazaki Kaihe、Nakayama Yoshihiro、Ono Kazuya、Itaki Takuya、Aoyama Yuichi、Simizu Daisuke、Mizobata Kohei、Ohshima Kay I.、Nogi Yoshifumi、Rintoul Stephen R.、van Wijk Esmee、Greenbaum Jamin S.、Blankenship Donald D.、Saito Koji、Aoki Shigeru
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 4955-4955

    • DOI

      10.1038/s41467-023-39764-z

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] New Southern Ocean transfer function for subsurface temperature prediction using radiolarian assemblages2023

    • Author(s)
      Civel-Mazens M.、Cortese G.、Crosta X.、Lawler K.A.、Lowe V.、Ikehara M.、Itaki T.
    • Journal Title

      Marine Micropaleontology

      Volume: 178 Pages: 102198-102198

    • DOI

      10.1016/j.marmicro.2022.102198

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Multiple episodes of ice loss from the Wilkes Subglacial Basin during the Last Interglacial2023

    • Author(s)
      7.Iizuka M, Seki O, Wilson D J, Suganuma Y, Horikawa K, van de Flierd T, Ikehara M, Itaki T, Irino T, Yamamoto M, Hirabayashi M, Matsuzaki H, Sugisaki S
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 1-10

    • DOI

      10.1038/s41467-023-37325-y

    • Related Report
      2023 Annual Research Report 2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Relationship between modern deep-sea ostracods and water mass structure in East Antarctica2022

    • Author(s)
      Satoshi Sasaki,Toshiaki Irizuki,Takuya Itaki,Yuki Tokuda,Takeshige Ishiwa,Yusuke Suganuma
    • Journal Title

      Paleontological Research

      Volume: - Issue: 2 Pages: 211-230

    • DOI

      10.2517/pr210033

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 海底地形に制約された完新世の東南極トッテン氷床変動2023

    • Author(s)
      板木拓也,菅沼悠介,関 宰,山本正伸,大森貴之,天野敦子,石輪健樹,清家弘治,尾張聡子,羽田裕貴,池原 実,青木 茂
    • Organizer
      日本地質学会学術大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] Mid-Holocene retreat of ice shelves off Totten Glacier, East Antarctica2023

    • Author(s)
      Takuya ITAKI, Yusuke SUGANUMA, Osamu SEKI, Takayuki Omori, Atsuko AMANO, Takeshige ISHIWA, Yoshiaki SUZUKI, Satoko OWARI, Yuki HANEDA, Koji SEIKE, Yuri YAMAZAKI, Daisuke HIRANO, Minoru IKEHARA, Shigeru AOKI
    • Organizer
      INSTANT
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 完新世における東南極トッテン氷河沖の棚氷後退2022

    • Author(s)
      板木拓也,菅沼悠介,関 宰,山本正伸,大森貴之,天野敦子,石輪健樹,清家弘治,尾張聡子,羽田裕貴,池原 実,青木 茂
    • Organizer
      地質学会第129年学術大会
    • Related Report
      2022 Annual Research Report
  • [Book] 古生物学の百科事典、コラム:縮小する南極氷床2023

    • Author(s)
      板木拓也・中山佳洋・菅沼悠介
    • Total Pages
      754
    • Publisher
      丸善出版
    • ISBN
      9784621307588
    • Related Report
      2022 Annual Research Report

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Published: 2021-04-28   Modified: 2025-01-30  

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