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Change in the Kuroshio path and formation of Kuroshio branch currents over a timescale of ten thousand years

Research Project

Project/Area Number 17H02959
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionEhime University

Principal Investigator

Guo Xinyu  愛媛大学, 沿岸環境科学研究センター, 教授 (10322273)

Co-Investigator(Kenkyū-buntansha) 佐川 拓也  金沢大学, 地球社会基盤学系, 助教 (40448395)
加 三千宣  愛媛大学, 沿岸環境科学研究センター, 准教授 (70448380)
森本 昭彦  愛媛大学, 沿岸環境科学研究センター, 教授 (80301323)
久保田 好美  独立行政法人国立科学博物館, 地学研究部, 研究員 (80710946)
Project Period (FY) 2017-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥17,290,000 (Direct Cost: ¥13,300,000、Indirect Cost: ¥3,990,000)
Fiscal Year 2020: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2019: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2018: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Keywords黒潮 / 対馬暖流 / 最終氷期最盛期 / 日本海 / 東シナ海 / 亜熱帯循環 / 海洋科学 / 海洋物理 / 海洋物理・陸水学 / 古気候モデル / 偏西風 / ケラマギャップ
Outline of Final Research Achievements

This study is for understanding how the changes of sea level and atmospheric forcing from the Last Glacial Maximum (21ka) to modern period affected the path and volume transport of the Kuroshio and its branch currents (Tsushima, Tsugaru and Soya Warm Currents). Our method includes numerical simulation with ocean general circulation models and analysis of sediment core data. We developed two Pacific Ocean models with a horizontal resolution of 1/4 and 1/12 degree, respectively, using the reconstructed sea level over the past 35 thousand years. The models were driven by atmospheric forcing (winds and heat flux) from a paleoclimatic model (MIROC4m) for 35, 30, 21, 6, and 0 ka, respectively. The model results reveal the changes of major ocean currents, water temperature and salinity over the past 35 thousand years. Meanwhile, the paleoenvironments were reconstructed from the sediment data offshore of Wakasa Bay in the Japan Sea and those in the East China Sea.

Academic Significance and Societal Importance of the Research Achievements

黒潮とその分枝流である対馬暖流は日本周辺の海洋環境と気候を維持する基盤の一つである。本研究では、3万5千年前から現代までの海水準と大気条件の変化を海洋大循環モデルに与え、最終氷期最盛期を含む万年スケールの黒潮流路・流速の変化及び日本海に流入する対馬暖流の流量変化を解明した。その成果は古海洋学分野で知られている黒潮流路に関する2つの仮説に結論を付けるだけではなく、今後起こりえる地球温暖化の黒潮流路・流量への影響の参考となる。また、海水準の上昇に伴う対馬暖流の形成過程を提示できたことや海水準の変動に対して対馬暖流の流量が非線形の応答を示したことは日本海の環境変遷の解明に寄与する。

Report

(5 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (39 results)

All 2021 2020 2019 2018 2017

All Journal Article (13 results) (of which Int'l Joint Research: 7 results,  Peer Reviewed: 13 results,  Open Access: 5 results) Presentation (25 results) (of which Int'l Joint Research: 6 results,  Invited: 2 results) Book (1 results)

  • [Journal Article] Paleoceanography of the northwestern Pacific across the Early-Middle Pleistocene boundary (Marine Isotope Stages 20-18)2021

    • Author(s)
      Yoshimi Kubota, Yuki Haneda, Koji Kameo, Takuya Itaki, Hiroki Hayashi, Kizuku Shikoku, Kentaro Izumi, Martin J. Head, Yusuke Suganuma & Makoto Okada
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 8 Issue: 1 Pages: 29-29

    • DOI

      10.1186/s40645-020-00395-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Sedimentary DNA tracks decadal-centennial changes in fish abundance2020

    • Author(s)
      Kuwae Michinobu、Tamai Hiromichi、Doi Hideyuki、Sakata Masayuki K.、Minamoto Toshifumi、Suzuki Yoshiaki
    • Journal Title

      Communications Biology

      Volume: 3 Issue: 1 Pages: 1-12

    • DOI

      10.1038/s42003-020-01282-9

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Seasonal variability in the inorganic ocean carbon cycle in the Northwest Pacific evaluated using a biogeochemical and carbon model coupled with an operational ocean model2020

    • Author(s)
      Ishizu Miho、Miyazawa Yasumasa、Tsunoda Tomohiko、Guo Xinyu
    • Journal Title

      Climatic Change

      Volume: 162 Issue: 2 Pages: 877-902

    • DOI

      10.1007/s10584-020-02779-2

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Tidal Effect on Water Export Rate in the Eastern Shelf Seas of China2020

    • Author(s)
      Lin Lei、Liu Dongyan、Guo Xinyu、Luo Chongxin、Cheng Yao
    • Journal Title

      Journal of Geophysical Research: Oceans

      Volume: 125 Issue: 5 Pages: 1-18

    • DOI

      10.1029/2019jc015863

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Palaeolithic voyage for invisible islands beyond the horizon2020

    • Author(s)
      Kaifu Yousuke、Kuo Tien-Hsia、Kubota Yoshimi、Jan Sen
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 19785-19785

    • DOI

      10.1038/s41598-020-76831-7

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Paleoceanographic evolution of the Japan Sea over the last 460 kyr ? A coccolithophore perspective2019

    • Author(s)
      Saavedra-Pellitero Mariem、Baumann Karl-Heinz、Gallagher Stephen John、Sagawa Takuya、Tada Ryuji
    • Journal Title

      Marine Micropaleontology

      Volume: 152 Pages: 101720-101720

    • DOI

      10.1016/j.marmicro.2019.01.001

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Tempo‐Spatial Variations of the Kuroshio Current in the Tokara Strait Based on Long‐Term Ferryboat ADCP Data2019

    • Author(s)
      Liu Zhao‐Jun、Nakamura Hirohiko、Zhu Xiao‐Hua、Nishina Ayako、Guo Xinyu、Dong Menghong
    • Journal Title

      Journal of Geophysical Research: Oceans

      Volume: 124 Issue: 8 Pages: 6030-6049

    • DOI

      10.1029/2018jc014771

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Palaeolithic seafaring in East Asia: testing the bamboo raft hypothesis2019

    • Author(s)
      Kaifu Yousuke, Lin Chih-hsing, Goto Akira, Ikeya Nobuyuki, Yamada Masahisa, Chiang Wei-Chuan, Fujita Masaki et. al.
    • Journal Title

      Antiquity

      Volume: 93 Issue: 372 Pages: 1424-1441

    • DOI

      10.15184/aqy.2019.90

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Millennial-scale variability of East Asian summer monsoon inferred from sea surface salinity in the northern East China Sea (ECS) and its impact on the Japan Sea during Marine Isotope Stage (MIS) 32019

    • Author(s)
      Kubota Yoshimi、Kimoto Katsunori、Tada Ryuji、Uchida Masao、Ikehara Ken
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 6 Issue: 1 Pages: 39-39

    • DOI

      10.1186/s40645-019-0283-0

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 沿岸域堆積物の過去数百~数千年間を対象としたパレオ研究―豊後水道・別府湾を例として2018

    • Author(s)
      加 三千宣
    • Journal Title

      第四紀研究

      Volume: 57 Pages: 175-195

    • NAID

      130007555481

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 別府湾におけるマイクロプラスチックの堆積フラックス2018

    • Author(s)
      桝本一成・加三千宣・日向博文
    • Journal Title

      土木学会論文集B2(海岸工学)

      Volume: 65

    • NAID

      130007503906

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Multidecadal, centennial, and millennial variability in sardine and anchovy abundances in the western North Pacific and climate?fish linkages during the late Holocene2017

    • Author(s)
      Kuwae Michinobu、Yamamoto Masanobu、Sagawa Takuya、Ikehara Ken、Irino Tomohisa、Takemura Keiji、Takeoka Hidetaka、Sugimoto Takashige
    • Journal Title

      Progress in Oceanography

      Volume: 159 Pages: 86-98

    • DOI

      10.1016/j.pocean.2017.09.011

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Variation in subsurface water temperature and its link to the Kuroshio Current in the Okinawa Trough during the last 38.5 kyr2017

    • Author(s)
      Y. Kubota, N. Suzuki, K. Kimoto, M. Uchida, T. Itaki, K. Ikehara, R.A. Kim and K.E. Lee
    • Journal Title

      Quaternary International

      Volume: 452 Pages: 1-11

    • DOI

      10.1016/j.quaint.2017.06.021

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Sedimentary DNA can track decadal-centennial changes in fish species abundance.2020

    • Author(s)
      Michinobu Kuwae, Hiromichi Tamai, Hideyuki Doi, Toshifumi Minamoto and Masayuki K Sakata
    • Organizer
      Ocean Science Meeting 2020, AGU ASLO
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Influence of East Asian summer and winter monsoons on the millennial-scale color alternation of Japan Sea sediment2020

    • Author(s)
      Takuya Sagawa, Yusuke Narita, Takuya Matsuzaki, Masafumi Murayama, Takashi Hasegawa, Akiko Goto, Takeshi Nakagawa
    • Organizer
      JPGU-AGU Joint meeting 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 前期-中期更新世境界における北西太平洋の海洋環境変動2020

    • Author(s)
      久保田好美・羽田裕貴・亀尾浩司・板木拓也・林広樹・Martin J. Head・菅沼悠介・岡田誠
    • Organizer
      日本第四紀学会2020年大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 北西太平洋海域における前期更新世海洋環境と東アジアモンスーン2020

    • Author(s)
      桑野 太輔・亀尾 浩司・久保田 好美・万徳佳菜子・宇都宮 正志・岡田 誠
    • Organizer
      地球環境史学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Millennial-scale hydrographic changes in the northwestern Pacific during marine isotope stage 19: Teleconnections with ice melt in the North Atlantic2020

    • Author(s)
      羽田裕貴・岡田誠・久保田好美・菅沼 悠介
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2020 Annual Research Report
  • [Presentation] The changes of the Kuroshio path in the Northwest Pacific since 35ka2019

    • Author(s)
      Yang, H., Guo, X., Abe-Ouchi, A., Miyazawa, Y., Varlamov, S., Chan, W.
    • Organizer
      Japan Geoscience Union Meeting 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Structure and variability of the Kuroshio current in the Tokara Strait2019

    • Author(s)
      Liu, Z., Nakamura, H., Zhu, X., Nishina, A., Guo, X., Dong, M.
    • Organizer
      Japan Geoscience Union Meeting 2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] Abrupt hydrographic changes in the northwestern Pacific response to the ice melting during MIS 19 from the Chiba composite section2019

    • Author(s)
      Haneda, Y., M. Okada, Y. Kubota, Y. Suganuma
    • Organizer
      20th Congress of the International Union for Quaternary Research (INQUA)
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Multi-millennial Scale Hydrographic Changes In The Northwestern Pacific Response To The Northern Ice Melt During Mis 19 From The Chiba Composite Section, Central Japan2019

    • Author(s)
      Haneda, Y., Y. Kubota, M. Okada, Y. Suganuma
    • Organizer
      13th International Conference on Paleoceanography
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] MIS19における北西太平洋の数千年スケール古海洋変動史2019

    • Author(s)
      羽田裕貴・岡田誠・久保田好美・菅沼悠介・横川菜々子・齋藤知里・林広樹
    • Organizer
      第5回地球環境史学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Calcareous nannofossil biostratigraphy and oxygen isotope stratigraphy of the lower part of the Pleistocene formation distributed in the central part of the Pacific side of Japan2019

    • Author(s)
      桑野 太輔・久保田 好美・万徳 佳菜子・亀尾 浩司
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 千葉複合セクションの酸素同位体記録・浮遊性有孔虫群集によるMIS19における北西太平洋の古海洋変動復元2019

    • Author(s)
      5.羽田 裕貴・横川 菜々子・岡田 誠・林 広樹・久保田 好美・菅沼 悠介
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 400,000 years millennial scale temperature and rainfall in East Asia deduced from paired Mg/Ca and oxygen isotope of planktic foraminifera from the East China Sea2019

    • Author(s)
      6.Kubota, Y., S. Clemens, K.-E. Lee, A. Holbourn, E. Wakisaka, K. Horikawa, R. Tada, K. Kimoto
    • Organizer
      Japan Geoscience Union Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 最終氷期最盛期の黒潮を対象とした数値シミュレーション2018

    • Author(s)
      郭 新宇、武藤 玲央、宮澤 泰正
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
    • Invited
  • [Presentation] 黒潮内側域における異常水温の発生2018

    • Author(s)
      郭 新宇、山田 彩加
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 日本海南部若狭湾沖堆積物の明暗互層に記録された環境変動2018

    • Author(s)
      成田 祐亮、横山 真大、佐川 拓也、後藤(桜井) 晶子、長谷川 卓、久保田 好美
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 過去数千年間の日本マイワシ・カタクチイワシの長期変動2018

    • Author(s)
      加 三千宣・山本正伸・別府湾堆積物研究プロジェクト・杉本隆成
    • Organizer
      日本水産海洋学会2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 古海洋・古気候記録にみられる日本周辺のイワシ類の個体数と中緯度古気候指標の数百年規模変動2018

    • Author(s)
      加 三千宣・山本正伸・佐川拓也・池原研・入野智久・竹村恵二・武岡英隆・杉本隆成
    • Organizer
      日本海洋学会2018年秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 別府湾海底堆積物にみられるイワシ類の過去7000年間の個体数変動2018

    • Author(s)
      加 三千宣・山本正伸・別府湾海底コア研究グループ
    • Organizer
      日本第四紀学会2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 別府湾海底堆積物の魚鱗記録にみられる過去2800年間のイワシ類の長期動態2018

    • Author(s)
      加 三千宣・山本正伸・別府湾海底コア研究グループ
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 日本海における古海洋環境復元と物理モデルのコラボレーション2017

    • Author(s)
      佐川拓也,郭 新宇
    • Organizer
      日本地球惑星科学連合2017年大会
    • Related Report
      2017 Annual Research Report
  • [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)
      谷崎恭平,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
    • Related Report
      2017 Annual Research Report
  • [Presentation] 別府湾海底堆積物の魚鱗記録からみた後期完新世のイワシ類の長期動態2017

    • Author(s)
      加 三千宣・山本正伸・別府湾海底コア研究グループ
    • Organizer
      日本第四紀学会2017年大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 完新世の気候変動に対する北西太平洋のイワシ類の応答2017

    • Author(s)
      加 三千宣、山本 正伸、竹村 恵二、池原 研、山田 圭太郎、石下 浩平、高松 裕子、杉本 隆成
    • Organizer
      日本地球惑星科学連合2017年大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] Reconstruction of vertical temperature structure in the East China Sea to better understand the past Kuroshio variability2017

    • Author(s)
      Kubota, Y., K. Kimoto, R. Tada
    • Organizer
      JpGU-AGU Joint Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Book] Changing Asia-Pacific Marginal Seas2020

    • Author(s)
      Chen-Tung Arthur Chen and Xinyu Guo
    • Total Pages
      320
    • Publisher
      Springer Singapore
    • ISBN
      9789811548857
    • Related Report
      2020 Annual Research Report

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Published: 2017-04-28   Modified: 2022-01-27  

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