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Retrieving the climate record covering the last glacial period in Japan by drilling speleothems cores in caves

Research Project

Project/Area Number 20H00628
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 63:Environmental analyses and evaluation and related fields
Research InstitutionNagoya University

Principal Investigator

Uemura Ryu  名古屋大学, 環境学研究科, 准教授 (00580143)

Co-Investigator(Kenkyū-buntansha) 阿部 理  名古屋大学, 環境学研究科, 助教 (00293720)
浅海 竜司  東北大学, 理学研究科, 准教授 (00400242)
Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2024)
Budget Amount *help
¥45,370,000 (Direct Cost: ¥34,900,000、Indirect Cost: ¥10,470,000)
Fiscal Year 2023: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Fiscal Year 2022: ¥8,710,000 (Direct Cost: ¥6,700,000、Indirect Cost: ¥2,010,000)
Fiscal Year 2021: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
Fiscal Year 2020: ¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
Keywords氷期 / 鍾乳洞 / 石筍 / 安定同位体 / 流体包有物 / 気候 / 同位体 / 鍾乳石 / 古気候 / 最終氷期 / 安定同位体比 / 水の同位体 / 氷期サイクル / 酸素同位体 / コア掘削
Outline of Research at the Start

長期間の気候変動データは、日射量等の変化に対する気候システムの応答を理解することに加え、気候シミュレーションの予測精度の向上のためにも必須といえる。近年、洞窟の鍾乳石の一種である石筍を用いた気候復元の研究が急速に拡大している。しかし、日本においては、大型の石筍が少なく、連続的なデータを得ることが困難であった。そこで、本計画では、洞窟内において、フローストーンと呼ばれる鍾乳石を掘削することで、連続かつ高時間分解能な気候変動データの取得を目指す。掘削したコアの安定同位体比や流体包有物の分析によって、過去の日本地域における気候変動の実態とその変動メカニズムを解明する。

Outline of Final Research Achievements

To elucidate climate change in Japan since the Last Glacial Period, we conducted drilling of speleothems in caves in the Okinawa region and successfully obtained high-resolution, long-term paleoclimate records. A notable achievement was acquiring a 90,000-year record from Minami-Daito Island, dated with U-Th methods at high precision. Oxygen isotope analyses revealed regional expressions of East Asian monsoon variability. Fluid inclusion analysis of another Holocene stalagmite revealed multi-decadal cooling episodes likely linked to volcanic eruptions. These findings contribute to a deeper understanding of past climate dynamics in the subtropical Northwest Pacific.

Academic Significance and Societal Importance of the Research Achievements

本研究は、日本における過去9万年間の気候変動を高時間分解能で明らかにした点で学術的意義が大きい。流体包有物の分析により、鬼界カルデラ噴火を含む大規模火山噴火活動と数十年スケールの気温低下の関係を定量的に評価できた点は、気候変動メカニズムの理解を深めるうえで重要である。また、開発した独自の分析技術は他分野への応用も進展し、変成岩の石英脈や粘土鉱物等の試料について初期的な成果も得た。

Report

(6 results)
  • 2024 Final Research Report ( PDF )
  • 2023 Annual Research Report
  • 2022 Annual Research Report
  • 2021 Annual Research Report
  • 2020 Comments on the Screening Results   Annual Research Report
  • Research Products

    (51 results)

All 2025 2024 2023 2022 2021 2020 Other

All Int'l Joint Research (3 results) Journal Article (16 results) (of which Int'l Joint Research: 10 results,  Peer Reviewed: 15 results,  Open Access: 14 results) Presentation (31 results) (of which Int'l Joint Research: 10 results,  Invited: 5 results) Book (1 results)

  • [Int'l Joint Research] 南洋理工大学(Nanyang Technological University)(シンガポール)

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] National Taiwan University(その他の国・地域 (台湾))

    • Related Report
      2023 Annual Research Report
  • [Int'l Joint Research] Texas Tech University(米国)

    • Related Report
      2023 Annual Research Report
  • [Journal Article] Multidecadal hydroclimate responses to volcanic forcing in the Mid-Holocene2025

    • Author(s)
      Azharuddin Syed、Omine Kanako、Masaka Kosuke、Asami Ryuji、Lone Mahjoor Ahmad、Chou Yu-Chen、Shen Chuan-Chou、Uemura Ryu
    • Journal Title

      Communications Earth & Environment

      Volume: 6 Issue: 1 Pages: 101-101

    • DOI

      10.1038/s43247-025-02047-0

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Contrasting Responses of Ion Concentration Variations to Atmospheric Patterns in Central Himalayan Ice Cores2025

    • Author(s)
      Tsushima Akane、Esashi Nao、Matoba Sumito、Iizuka Yoshinori、Uemura Ryu、Adachi Kouji、Kinase Takeshi、Hirabayashi Motohiro、Kawakami Kaoru、Kayastha Rijan B.、Fujita Koji
    • Journal Title

      Journal of Geophysical Research: Atmospheres

      Volume: 130 Issue: 2

    • DOI

      10.1029/2024jd042392

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hydrogen and triple-oxygen isotope effects of water adsorption on KGa-2 kaolinite with implications for pedological separation of soil water2025

    • Author(s)
      Horita Juske、Ling Xinying、Liu Changjie、Abe Osamu、Uemura Ryu
    • Journal Title

      Geochimica et Cosmochimica Acta

      Volume: in press Pages: 92-103

    • DOI

      10.1016/j.gca.2025.04.013

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] First direct evidence of the O-H isotopic composition of slab-derived water in the subduction zone, revealed by fluid inclusions in high-pressure metamorphic rocks2025

    • Author(s)
      Yoshida Kenta K.、Uemura Ryu、Ijiri Akira、Ikehara Minoru、Hirajima Takao
    • Journal Title

      Geoscience Letters

      Volume: 12 Issue: 1 Pages: 19-19

    • DOI

      10.1186/s40562-025-00396-4

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Initiation and internal structure of temperate coral reef community over the past 7.3 kyr in Kushimoto, mainland of Japan2025

    • Author(s)
      Hongo Chuki、Asami Ryuji、Yamano Hiroya
    • Journal Title

      Marine Geology

      Volume: 481 Pages: 107499-107499

    • DOI

      10.1016/j.margeo.2025.107499

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] A snapshot of the climate in the Middle Pleistocene inferred from a stalagmite from central Japan2024

    • Author(s)
      Sakai Masataka, Hori Masako, Uemura Ryu, Ghaleb Bassam, Pinti Daniele L., Yumiba Mahiro, Murayama Masafumi, Kano Akihiro
    • Journal Title

      Geoscience Letters

      Volume: 11 Issue: 1 Pages: 1-4

    • DOI

      10.1186/s40562-024-00357-3

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Paleoenvironmental significance of growth story of long-living deep-water acervulinid macroids from Kikai-jima shelf, Central Ryukyu Islands, Japan2024

    • Author(s)
      Bassi Davide、Braga Juan Carlos、Asami Ryuji、Goto Kazuhisa、Szidat Sonke、Takayanagi Hideko、Iryu Yasufumi
    • Journal Title

      Palaeogeography, Palaeoclimatology, Palaeoecology

      Volume: 647 Pages: 112254-112254

    • DOI

      10.1016/j.palaeo.2024.112254

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Are the coral mounds of the Kushimoto area, Wakayama Prefecture, Japan, submerged Holocene reefs?2024

    • Author(s)
      Hongo Chuki、Asami Ryuji、Iryu Yasufumi
    • Journal Title

      Galaxea, Journal of Coral Reef Studies

      Volume: 26 Issue: 1 Pages: 1-7

    • DOI

      10.3755/galaxea.G26-1

    • ISSN
      1883-0838, 1883-3969
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution2023

    • Author(s)
      Okazaki Ryuji、Marty Bernard、Busemann Henner、Hashizume Ko、Gilmour Jamie D.、Meshik Alex、Yada Toru、Kitajima Fumio、Broadley Michael W.、Byrne David ... Yabuta Hikaru ... et al.
    • Journal Title

      Science

      Volume: 379 Issue: 6634 Pages: 431-431

    • DOI

      10.1126/science.abo0431

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 動的時間伸縮法によるサンゴ年輪データの時系列変換2023

    • Author(s)
      阿部理、浅海竜司、奥平早香、森本真紀
    • Journal Title

      岐阜大学教育学部研究報告

      Volume: 47 Pages: 41-46

    • Related Report
      2022 Annual Research Report
  • [Journal Article] First asteroid gas sample delivered by the Hayabusa2 mission: A treasure box from Ryugu2022

    • Author(s)
      Okazaki Ryuji、Miura Yayoi N.、Takano Yoshinori、Sawada Hirotaka、Sakamoto Kanako、Yada Toru、Yamada Keita、Kawagucci Shinsuke、Matsui Yohei、Hashizume Ko ... Yabuta Hikaru ... et al.
    • Journal Title

      Science Advances

      Volume: 8 Issue: 46 Pages: 2375-2548

    • DOI

      10.1126/sciadv.abo7239

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Reconstruction of ocean environment time series since the late nineteenth century using sclerosponge geochemistry in the northwestern subtropical Pacific2021

    • Author(s)
      Asami Ryuji, Matsumori Taketo, Shinjo Ryuichi, Uemura Ryu, Miyaoka Yuki, Mizuyama Masaru, Ise Yuji, Sakamaki Takashi
    • Journal Title

      PROGRESS IN EARTH AND PLANETARY SCIENCE

      Volume: 8 Issue: 1

    • DOI

      10.1186/s40645-021-00434-7

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Last glacial temperature reconstructions using coupled isotopic analyses of fossil snails and stalagmites from archaeological caves in Okinawa, Japan.2021

    • Author(s)
      Ryuji Asami, Rikuto Hondo, Ryu Uemura, Masaki Fujita, Shinji Yamasaki, Chuan-Chou Shen, Chen Jin-Ping, Chung-Che Wu, Xiuyang Jiang, Hideko Takayanagi, Ryuichi Shinjo, Akihiro Kano, Yasufumi Iryu
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 21922-21922

    • DOI

      10.1038/s41598-021-01484-z

    • Related Report
      2021 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
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High‐Resolution Evidence for Middle Holocene East Asian Winter and Summer Monsoon Variations: Snapshots of Fossil Coral Records2020

    • Author(s)
      Asami Ryuji、Yoshimura Natsumi、Toriyabe Hiroto、Minei Shogo、Shinjo Ryuichi、Hongo Chuki、Sakamaki Takashi、Fujita Kazuhiko
    • Journal Title

      Geophysical Research Letters

      Volume: 47 Issue: 16

    • DOI

      10.1029/2020gl088509

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of geochemical records as a paleoenvironmental proxy in the hypercalcified demosponge Astrosclera willeyana2020

    • Author(s)
      Ryuji ASAMI*, A. Kinjo, D. Ohshiro, T. Naruse, M. Mizuyama, R. Uemura, R. Shinjo, Y. Ise, Y. Fujita, and T. Sakamaki
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: - Issue: 1 Pages: 15-15

    • DOI

      10.1186/s40645-020-00329-z

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 沖縄県南大東島石筍コアによる過去9万年間の同位体変動2024

    • Author(s)
      有村 悠汰、植村 立、Syed Azharuddin、阿部 理、浅海 竜司、Yuan Shufeng、Chin Hahjung、Wang Xianfeng
    • Organizer
      日本地球惑星科学連合 連合大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 延岡衝上断層周辺に分布する石英脈流体包有物の水の水素・酸素同位体分析による地震性分岐断層深部の水の起源と挙動の解明2024

    • Author(s)
      辰巳 寛二、井尻 暁、植村 立、大坪 誠、池原 実、山口 飛鳥
    • Organizer
      日本地球惑星科学連合 連合大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Indian summer monsoon evolution during the last glacial termination2024

    • Author(s)
      Sakonvan Chawchai、Xiaojing Du、Hao-Cheng Wang、Hsun-Ming Hu、Liangcheng Tan、Xiuyang Jiang、Ryuji Asami、Ryu Uemura、Ludvig Lwemark、Barbara Wohlfarth、Yuji Sano、Yusuke Yokoyama、Gideon M Henderson、Chuan-Chou Shen
    • Organizer
      Japan Geoscience Union Meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 鍾乳石の流体包有物分析による完新世中期の沖縄の数十年スケールの気候変動:大規模火山噴火との関係2024

    • Author(s)
      植村 立、Syed Azharuddin、大嶺佳菜子、眞坂昴佑、浅海竜司、Mahjoor Ahmad Lone、Yu-Chen Chou、Chuan-Chou Shen
    • Organizer
      日本第四紀学会2024年大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 沖縄県南大東島鍾乳石コアを用いた 49-92 kyr BP における数千年スケールの水文気候変動2024

    • Author(s)
      有村 悠汰、植村 立、Syed Azharuddin、阿部 理、浅海 竜司、Yuan Shufeng、Chin Hahjung、Wang Xianfeng
    • Organizer
      日本第四紀学会2024年大会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 鍾乳石流体包有物が明らかにする鬼界カルデラを 含む火山噴火による中期完新世の数十年規模気候変動2024

    • Author(s)
      植村立、Syed Azharuddin、大嶺佳菜子、眞坂昴佑、浅海竜司、Mahjoor Lone、Yu Chen Chou、Chuan-Chou Shen
    • Organizer
      日本地球化学会年会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 沖縄県南大東島鍾乳石コアの酸素安定同位体比に基づく数千年スケールの気候変動2024

    • Author(s)
      有村 悠汰、植村 立、Syed Azharuddin、阿部 理、浅海 竜司、Yuan Shufeng、Chin Hahjung、Wang Xianfeng
    • Organizer
      日本地球化学会年会
    • Related Report
      2023 Annual Research Report
  • [Presentation] Origin of fluid along a plate boundary seismogenic zone estimated by hydrogen and oxygen isotopic compositions of water in fluid inclusion of quartz veins at the Nobeoka Thrust, Southwest Japan2024

    • Author(s)
      Kanji Tatsumi, Akira Ijiri, Ryu Uemura, Makoto Otsubo, Minoru Ikehara, Asuka Yamaguchi
    • Organizer
      International Joint Workshop on Slow-to-Fast Earthquakes 2024
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Multidecadal Hydroclimate Responses to Large Volcanic Forcing during the Mid-Holocene in a Subtropical Northwest Pacific Island Evidenced by Fluid Inclusions in a Speleothem2024

    • Author(s)
      Ryu Uemura, Syed Azharuddin, Kanako Omine, Kosuke Masaka, Ryuji Asami, Mahjoor Ahmad Lone, Yu-chen Chou and Chuan-Chou Shen
    • Organizer
      American Geophysical Union annual meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Weak Millennial-Scale Hydroclimate Variability Between 49 and 92 kyr BP Recorded in a Stalagmite from a Subtropical Northwest Pacific Island2024

    • Author(s)
      Yuta Arimura, Ryu Uemura, Syed Azharuddin, Osamu Abe, Ryuji Asami, Shufeng Yuan, Hahjung Chin and Xianfeng Wan
    • Organizer
      American Geophysical Union annual meeting
    • Related Report
      2023 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 炭酸塩試料による過去の大気海洋変動の解析:季節スケールから氷期・間氷期スケールまで2024

    • Author(s)
      浅海竜司
    • Organizer
      日本地質学会第131回学術大会
    • Related Report
      2023 Annual Research Report
    • Invited
  • [Presentation] 超高感度赤外レーザー吸収分光に基づく重水・トリチウム水分析のための試料導入法の開発2023

    • Author(s)
      富田 英生, 岩元 一輝, 齊藤 圭亮, 鈴木 勇太, 柘植 紘汰, 西澤 典彦, 植村 立, 阿部 理, 阿部 恒
    • Organizer
      第20回 同位体科学研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] A geoarchaeological approach for reconstructing last glacial temperatures using coupled isotopic analyses of fossil snails and stalagmites from limestone caves in Okinawa, Japan2022

    • Author(s)
      Ryuji Asami, Rikuto Hondo, Ryu Uemura, Masaki Fujita, Shinji Yamasaki, Chuan-Chou Shen, Chung-Che Wu, Xiuyang Jiang, Hideko Takayanagi, Ryuichi Shinjo, Akihiro Kano, Yasufumi Iryu
    • Organizer
      European Geophysical Union General Assembly 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] A geoarchaeological approach for estimating last glacial temperatures using coupled isotopic analyses of fossil snails and stalagmites from limestone caves in Okinawa, Japan2022

    • Author(s)
      Ryuji Asami, Rikuto Hondoh, Ryu Uemura, Ryuichi Shinjo, Chuan-Chou Shen, Akihiro Kano, Masaki Fujita, Shinji Yamasaki, Hideko Takayanagi, Yasufumi Iryu
    • Organizer
      日本地球惑星科学連合 連合大会2022年大会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 長期間の古気候記録の取得を目指した洞窟内での鍾乳石掘削報告2022

    • Author(s)
      植村立、有村悠汰、阿部理、浅海竜司
    • Organizer
      日本地球化学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] トリチウム分析に向けた赤外キャビティーリングダウン分光システムの開発2022

    • Author(s)
      岩元 一輝,齊藤 圭亮,鈴木 勇太,植村 立, 阿部 理, 富田 英生
    • Organizer
      応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 外部共振器型量子カスケードレーザーを用いた微量同位体分子分析のキャビティーリングダウン分光2022

    • Author(s)
      鈴木 勇太, 齊藤 圭亮, 岩元 一輝, 植村 立, 阿部 理, 西澤 典彦, 阿部 恒, 富田 英生
    • Organizer
      応用物理学会秋季学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 長期古気候記録の取得を目指した沖縄県の洞窟内での鍾乳石掘削報告2022

    • Author(s)
      植村立、有村悠汰、阿部理、浅海竜司
    • Organizer
      地球環境史学会年会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Development of Cavity Ring-down Spectrometer for Tritiated/Heavy Water Samples2022

    • Author(s)
      Kazuki Iwamoto, Keisuke Saito, Yuta Suzuki, Ryu Uemura, Osamu Abe, Hisashi Abe, Norihiko Nishizawa, Hideki Tomita
    • Organizer
      Laser congress and exhibition
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 和歌山県串本にあるサンゴ群集マウンドは沈水サンゴ礁なのか?2022

    • Author(s)
      本郷宙軌・浅海竜司
    • Organizer
      日本サンゴ礁学会
    • Related Report
      2022 Annual Research Report
  • [Presentation] A temperature estimate for abrupt warming during the last deglaciation using isotopic analysis of fluid inclusions from a stalagmite in Okinawa, Japan2021

    • Author(s)
      Ryu Uemura, Satoru Mishima, Koki Nakamura, Ryuji Asami, Hirokazu Kato, Akihiro Kano, Jin-Ping. Chen, Chuan-Chou Shen
    • Organizer
      AGU fall meeting
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 石筍の流体包有物の同位体比分析による最終退氷期における沖縄地域の気温復元2021

    • Author(s)
      植村 立、三嶋 悟、中村 光樹、浅海 竜司、加藤大和、狩野 彰宏、Chen Jin-Ping、Shen Chuan-Chou
    • Organizer
      地球環境史学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 石筍の流体包有物分析による最終退氷期における沖縄地域の気温上昇の定量的な復元2021

    • Author(s)
      植村 立、三嶋 悟、中村 光樹、浅海 竜司、加藤大和、狩野 彰宏、Chen Jin-Ping、Shen Chuan-Chou
    • Organizer
      日本地球化学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] メモリー効果の影響がない水蒸気連続フロー方式による鍾乳石の流体包有物同位体分析手法の開発と評価2021

    • Author(s)
      植村 立
    • Organizer
      日本地球惑星科学連合 連合大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Tropical Pacific temperature seasonality and mean climate change during the last deglaciation from Tahiti Porites corals2021

    • Author(s)
      C. Oster, T. Felis, E. Hathorne, P. Deschamps, Ryuji ASAMI, U. Merkel, M. Kolling
    • Organizer
      14h International Coral Reef Symposium
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 喜界島サンゴ化石の酸素同位体比による後期完新世の数年~数十年スケール気候変動復元2021

    • Author(s)
      K.-Y. Chuang・浅海竜司・高柳栄子・中森享・井龍康文
    • Organizer
      第24回日本サンゴ礁学会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Speleothem as archive of past volcanism: Impact of Kikai volcano eruption (7.3 ka) on a remote oceanic island2020

    • Author(s)
      K. Tanaka, T. Miki, N. Takahata, R. Uemura, Ryuji ASAMI, T.-L. Yu, C.-C. Shen, K. Shirai, N. Murakami-Sugihara, K. Toyama, Y. Sano
    • Organizer
      Goldschmidt
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A combination of fossil shell- and stalagmite-based paleoclimate reconstructions from an archaeological site of Okinawa Island, Japan2020

    • Author(s)
      Ryuji Asami, Rikuto Hondoh, Ryu Uemura, Ryuichi Shinjo, Chuan-Chou Shen, Akihiro Kano, Masaki Fujita, Shinji Yamasaki, Hideko Takayanagi, Yasufumi Iryu
    • Organizer
      日本地球惑星科学連合 連合大会2020年大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 最終氷期GI-21における南大東島の鍾乳石の酸素同位体比変動2020

    • Author(s)
      植村立、浅海竜司、阿部理、Shufang YUAN, Xianfeng WANG
    • Organizer
      日本地球化学会
    • Related Report
      2020 Annual Research Report
  • [Presentation] プロキシとしての水の酸素水素同位体比の基礎と展望2020

    • Author(s)
      植村立
    • Organizer
      日本地球化学会
    • Related Report
      2020 Annual Research Report
    • Invited
  • [Presentation] A stalagmite-inferred hydroclimate record over the past 1200 years in a western Pacific island2020

    • Author(s)
      Ryu UEMURA, Ryuji ASAM, Mahjoor Ahmad LONE, Yu-Chen CHOU, Chuan-Chou SHEN
    • Organizer
      American Geophysical Union Fall meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Book] 日本の洞窟2025

    • Author(s)
      狩野彰宏、柏木健司 編著 (分担執筆:浅海竜司、植村 立)
    • Total Pages
      200
    • Publisher
      朝倉書店
    • ISBN
      9784254160833
    • Related Report
      2023 Annual Research Report

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Published: 2020-04-28   Modified: 2026-01-16  

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