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2021 Fiscal Year Annual Research Report

A study on Longterm Environmental changes and Wethering

Research Project

Project/Area Number 20H00193
Research InstitutionThe University of Tokyo

Principal Investigator

横山 祐典  東京大学, 大気海洋研究所, 教授 (10359648)

Co-Investigator(Kenkyū-buntansha) 大河内 直彦  国立研究開発法人海洋研究開発機構, 海洋機能利用部門, 部門長 (00281832)
Obrochta Stephen  秋田大学, 国際資源学研究科, 教授 (60752540)
Project Period (FY) 2020-04-01 – 2023-03-31
Keywords古気候 / 古海洋 / 風化
Outline of Annual Research Achievements

初年度に開発した、風化堆積物の定量的変動を示すことが可能なベリリウムの同位体のうち、誘導プラズマ質量分析装置を用いた、高感度のベリリウム安定同位体測定を行うことで、過去の気候および環境変化と風化侵食のシグナルがどのように保存されているかについての研究を進めた。特に氷期から現在の間氷期にいたった今でも、大規模な氷床が存在する南極大陸の現在は氷床が覆っていない露岩域と呼ばれる部分に着目した。最終氷期から現在にかけて、気候の温暖化と海水準の上昇、それに伴う氷床の融解などが起こっている。特に氷床は流動する際に基盤の岩石を削はくしている。露岩域ではかつて氷床が存在していた部分に、取り残された形での湖が存在しているため、この堆積物を用いることで、融解のタイミングなどについて議論を行うことができるデータの確保が期待された。今回は東南極の湖の堆積物についてベリリウムの同位体を分析した。すると、この地域の氷床の融解のタイミングは、北半球氷床のの融解から10,000年以上遅れてスタートしたことが明らかになった。またベリリウムの同位体からは、融解当初は風化起源のシグナルが残されているものの、その後、融解水の影響によるベリリウム同位体のエクスカーションがおよそ4,000年前に起こっていたことが明らかになった。特にこのタイミングは、海洋の循環パタンが変化したタイミングとして先行研究でも報告されているタイミングであり、沿岸地域への温暖な海流が侵入したことが原因と考えられた。海洋と氷床の変化について陸域の湖沼堆積物を用いることで関係性が明らかになった。これらについては論文が国際誌に掲載された。また、初年度に導入した堆積物のガンマ線を検出し、より最近の年代測定を行う分析装置の立ち上げも順調に行い、陸域のコアトップの年代測定に適用するべく調整を進めた。

Current Status of Research Progress
Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

コロナ禍での制限により、前年度に引き続き分析のペースが遅かった。特に大型加速器の装置の不調についても、復旧に時間を要し、分析のペースを上げることが難しかった。しかし、代表者の研究室で分析を進めることのできたベリリウムの安定同位体については分析を順調に進めることができ、成果の一部が出版されたことから。

Strategy for Future Research Activity

今後のコロナ禍の変化に柔軟に対応できるように、分析計画の見直しについて検討を行う。当面は当初の計画通りに進められると問題ないが、そのようにいかなかった場合も含めて、分担者との協議を行いながら研究を遂行している。

  • Research Products

    (68 results)

All 2022 2021

All Journal Article (21 results) (of which Int'l Joint Research: 19 results,  Peer Reviewed: 21 results,  Open Access: 21 results) Presentation (47 results) (of which Int'l Joint Research: 17 results,  Invited: 5 results)

  • [Journal Article] Paleotsunami history along the northern Japan trench based on sequential dating of the continuous geological record potentially inundated only by large tsunamis2022

    • Author(s)
      Ishizawa Takashi、Goto Kazuhisa、Nishimura Yuichi、Miyairi Yosuke、Sawada Chikako、Yokoyama Yusuke
    • Journal Title

      Quaternary Science Reviews

      Volume: 279 Pages: 107381~107381

    • DOI

      10.1016/j.quascirev.2022.107381

    • Peer Reviewed / Open Access
  • [Journal Article] Holocene coastal evolution, past tsunamis, and extreme wave event reconstructions using sediment cores obtained from the central coast of Hidaka, Hokkaido, Japan2022

    • Author(s)
      Nakanishi Ryo、Ashi Juichiro、Miyairi Yosuke、Yokoyama Yusuke
    • Journal Title

      Marine Geology

      Volume: 443 Pages: 106663~106663

    • DOI

      10.1016/j.margeo.2021.106663

    • Peer Reviewed / Open Access
  • [Journal Article] Detailed paleoseismic history of the Hinagu fault zone revealed by the high‐density radiocarbon dating and trenching survey across a surface rupture of the 2016 Kumamoto earthquake, Kyushu, Japan2021

    • Author(s)
      Shirahama Yoshiki、Miyashita Yukari、Kametaka Masao、Suzuki Yuji、Miyairi Yosuke、Yokoyama Yusuke
    • Journal Title

      Island Arc

      Volume: 30 Pages: e12376

    • DOI

      10.1111/iar.12376

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] 129I/127I and Δ14C records in a modern coral from Rowley Shoals off northwestern Australia reflect the 20th-century human nuclear activities and ocean/atmosphere circulations2021

    • Author(s)
      Mitsuguchi Takehiro、Okabe Nobuaki、Yokoyama Yusuke、Yoneda Minoru、Shibata Yasuyuki、Fujita Natsuko、Watanabe Takahiro、Saito-Kokubu Yoko
    • Journal Title

      Journal of Environmental Radioactivity

      Volume: 235-236 Pages: 106593~106593

    • DOI

      10.1016/j.jenvrad.2021.106593

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dating Lake Sediments Using Compound‐Specific <sup>14</sup> C Analysis of C <sub>16</sub> Fatty Acid: A Case Study From the Mount Fuji Volcanic Region, Japan2021

    • Author(s)
      Yamamoto Shinya、Nishizawa Fumikatsu、Yoshimoto Mitsuhiro、Miyairi Yosuke、Yokoyama Yusuke、Suga Hisami、Ohkouchi Naohiko
    • Journal Title

      Geochemistry, Geophysics, Geosystems

      Volume: 22 Pages: 1-9

    • DOI

      10.1029/2020GC009544

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A review of MIS 5e sea-level proxies around Japan2021

    • Author(s)
      Tam Evan、Yokoyama Yusuke
    • Journal Title

      Earth System Science Data

      Volume: 13 Pages: 1477~1497

    • DOI

      10.5194/essd-13-1477-2021

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Late Pleistocene interstadial sea-levels (MIS 5a) in Gulf St Vincent, southern Australia, constrained by amino acid racemization dating of the benthic foraminifer Elphidium macelliforme2021

    • Author(s)
      Murray-Wallace Colin V.、Cann John H.、Yokoyama Yusuke、Nicholas William A.、Lachlan Terry J.、Pan Tsun-You、Dosseto Anthony、Belperio Antonio P.、Gostin Victor A.
    • Journal Title

      Quaternary Science Reviews

      Volume: 259 Pages: 106899~106899

    • DOI

      10.1016/j.quascirev.2021.106899

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] On the geophysical processes impacting palaeo-sea-level observations2021

    • Author(s)
      Yokoyama Yusuke、Purcell Anthony
    • Journal Title

      Geoscience Letters

      Volume: 8 Pages: 1-19

    • DOI

      10.1186/s40562-021-00184-w

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Influences of Ocean Currents on the Diets of Demersal Fish Communities in the Western North Pacific Revealed by Their Muscle Carbon and Nitrogen Isotopic Compositions2021

    • Author(s)
      Ishikawa Naoto F.、Ogawa Nanako O.、Chikaraishi Yoshito、Yamaguchi Moto-omi、Fujikura Katsunori、Miyairi Yosuke、Yokoyama Yusuke、Nagata Toshi、Ohkouchi Naohiko
    • Journal Title

      Frontiers in Marine Science

      Volume: 8 Pages: 641282

    • DOI

      10.3389/fmars.2021.641282

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Comprehensive analysis of laboratory boron contamination for boron isotope analyses of small carbonate samples2021

    • Author(s)
      Kubota Kaoru、Ishikawa Tsuyoshi、Nagaishi Kazuya、Kawai Tatsuya、Sagawa Takuya、Ikehara Minoru、Yokoyama Yusuke、Yamazaki Toshitsugu
    • Journal Title

      Chemical Geology

      Volume: 576 Pages: 120280~120280

    • DOI

      10.1016/j.chemgeo.2021.120280

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The spatio-temporal structure of the Lateglacial to early Holocene transition reconstructed from the pollen record of Lake Suigetsu and its precise correlation with other key global archives: Implications for palaeoclimatology and archaeology2021

    • Author(s)
      Nakagawa T、Tarasov P、Staff R、Bronk RC、Marshall M、Schlolaut G、Bryant C、Brauer A、Lamb H、Haraguchi T、Gotanda K、Kitaba I、Kitagawa H、van der Plicht J、Yonenobu H、Omori T、Yokoyama Y、Tada R、Yasuda Y
    • Journal Title

      Global and Planetary Change

      Volume: 202 Pages: 103493~103493

    • DOI

      10.1016/j.gloplacha.2021.103493

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Temporal variation in radiocarbon pathways caused by sea-level and tidal changes in the Bonaparte Gulf, northwestern Australia2021

    • Author(s)
      Ishiwa Takeshige、Yokoyama Yusuke、Obrochta Stephen、Uehara Katsuto、Okuno Jun'ichi、Ikehara Minoru、Miyairi Yosuke
    • Journal Title

      Quaternary Science Reviews

      Volume: 266 Pages: 107079~107079

    • DOI

      10.1016/j.quascirev.2021.107079

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Environmental controls on holocene reef development along the eastern brazilian margin2021

    • Author(s)
      Dechnik Belinda、Bastos Alex C.、Vieira Laura S.、Webster Jody M.、Fallon Stewart、Yokoyama Yusuke、Braga Juan-Carlos、Pereira Manuel A.、Nothdurft Luke、Sanborn Kelsey、Moura Rodrigo L.、Amado-filho Gilberto
    • Journal Title

      Coral Reefs

      Volume: 40 Pages: 1321~1337

    • DOI

      10.1007/s00338-021-02130-w

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Glacial mode shift of the Atlantic meridional overturning circulation by warming over the Southern Ocean2021

    • Author(s)
      Oka Akira、Abe-Ouchi Ayako、Sherriff-Tadano Sam、Yokoyama Yusuke、Kawamura Kenji、Hasumi Hiroyasu
    • Journal Title

      Communications Earth and Environment

      Volume: 2 Pages: 1-8

    • DOI

      10.1038/s43247-021-00226-3

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Sensitivity of Holocene East Antarctic productivity to subdecadal variability set by sea ice2021

    • Author(s)
      Johnson Katelyn M.、McKay Robert M.、Etourneau Johan、Jim?nez-Espejo Francisco J.、Albot Anya、Riesselman Christina R.、Bertler Nancy A. N.、Horgan Huw J.、Crosta Xavier、Bendle James、Ashley Kate E.、Yamane Masako、Yokoyama Yusuke、Pekar Stephen F.、Escutia Carlota、Dunbar Robert B.
    • Journal Title

      Nature Geoscience

      Volume: 14 Pages: 762~768

    • DOI

      10.1038/s41561-021-00816-y

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Crustal anorthosite formation by deep‐seated hydrothermal circulation beneath fast‐spreading axis: Constraints from chronological approach, Sr isotope, and fluid?chromite inclusion investigation2021

    • Author(s)
      Akizawa Norikatsu、Miyake Akira、Igami Yohei、Tsuchiyama Akira、Asanuma Hisashi、Kogiso Tetsu、Wakaki Shigeyuki、Ishikawa Tsuyoshi、Arai Shoji、Eom Jiwon、Kawahata Hodaka、Aze Takahiro、Yokoyama Yusuke
    • Journal Title

      Island Arc

      Volume: 30 Pages: e12423

    • DOI

      10.1111/iar.12423

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Bayesian approach to age estimation of marine terraces and implications for the history of the great Kanto earthquakes, central Japan2021

    • Author(s)
      Komori Junki、Shishikura Masanobu、Ando Ryosuke、Yokoyama Yusuke、Miyairi Yosuke
    • Journal Title

      Quaternary Science Reviews

      Volume: 272 Pages: 107217~107217

    • DOI

      10.1016/j.quascirev.2021.107217

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Lake water dissolved inorganic carbon dynamics revealed from monthly measurements of radiocarbon in the Fuji Five Lakes, Japan2021

    • Author(s)
      Ota Kosuke、Yokoyama Yusuke、Miyairi Yosuke、Yamamoto Shinya、Miyajima Toshihiro
    • Journal Title

      Elementa: Science of the Anthropocene

      Volume: 9 Pages: 00149

    • DOI

      10.1525/elementa.2020.00149

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Identification of Paleoearthquakes and Coseismic Slips on a Normal Fault Using High-Precision Quantitative Morphology: Application to the Jiaocheng Fault in the Shanxi Rift, China2021

    • Author(s)
      Zou Junjie、He Honglin、Yokoyama Yusuke、Sproson Adam D.、Shirahama Yoshiki、Zhou Yongsheng、Wei Zhanyu、Shi Feng、Geng Shuang
    • Journal Title

      Lithosphere

      Volume: 2021 Pages: 2550879

    • DOI

      10.2113/2021/2550879

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Sedimentary response of a structural estuary to Holocene coseismic subsidence2021

    • Author(s)
      Reynolds Laura C.、Simms Alexander R.、Rockwell Thomas K.、Yokoyama Yusuke、Miyairi Yosuke、Hangsterfer Alexandra
    • Journal Title

      GSA Bulletin

      Volume: 135 Pages: B35827

    • DOI

      10.1130/B35827.1

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Changes in surface water masses in the northern East China Sea since the Last Glacial Maximum based on diatom assemblages2021

    • Author(s)
      Shirota Keiko、Okazaki Yusuke、Konno Susumu、Miyairi Yosuke、Yokoyama Yusuke、Kubota Yoshimi
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 8 Pages: 66

    • DOI

      10.1186/s40645-021-00456-1

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] 沖縄島備瀬崎における海草帯の層序2021

    • Author(s)
      佐野 亘, 藤田 和彦, 中野 義勝, 平林 頌子, 横山 祐典, 宮入 陽介, 磯村 尚子, 菅 浩伸,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] Paleoenvironmental reconstruction of the North Pacific Subtropical Mode Water at the Last Glacial Maximum based on carbon- and oxygen-isotope composition of fossil brachiopod Basiliola lucida2021

    • Author(s)
      菅澤 陽奈, 高柳 栄子, 横山 祐典, 板木 拓也, 宮島 利宏, 井龍 康文,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] Authigenic and detrital Mg and Li isotopes as a tracer of Antarctic chemical silicate weathering across the EOT2021

    • Author(s)
      Adam David Sproson, Toshihiro Yoshimura, Yusuke Yokoyama, Takahiro AZE, Tsuyoshi Ishikawa, Shigeyuki Wakaki, Naohiko Ohkouchi,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] Characteristic of radiocarbon dates in response to sea-level changes in the Bonaparte Gulf, Northwestern Australia2021

    • Author(s)
      石輪 健樹, 横山 祐典, オブラクタ スティーブン, 上原 克人, 奥野 淳一, 池原 実, 宮入 陽介,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] Insight to Western Pacific circulation from coral skeletal radiocarbon during the Anthropocene and Holocene2021

    • Author(s)
      平林 頌子, 横山 祐典, 鈴木 淳, Esat Tezer, 宮入 陽介, 阿瀬 貴博, Siringan Fernando, 前田 保夫, 菅 浩伸,
    • Organizer
      日本地球惑星科学連合2021年大会
    • Invited
  • [Presentation] Sub-surface water mass exchanges around the eastern equatorial Indian Ocean during the last 50,000 years2021

    • Author(s)
      高柳 栄子, 若公 良太, 木本 ゆうな, 若木 重行, 黒柳 あずみ, 石輪 健樹, 横山 祐典, 若木 仁美, 石川 剛志, 井龍 康文,
    • Organizer
      日本地球惑星科学連合2021年大会
    • Invited
  • [Presentation] Unveiling the black box: monthly measurements on dissolved inorganic radiocarbon in Fuji Five lakes water to understand the lake specific reservoir ages2021

    • Author(s)
      太田 耕輔, 横山 祐典, 宮入 陽介, 山本 真也, 宮島 利宏,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] A paleoclimatic reconstruction of the southeastern Pacific last deglacial using geochemical proxies obtained from offshore Chile2021

    • Author(s)
      根本 夏林, 横山 祐典, Adam Sproson, 宮入 陽介, 阿瀬 貴博, 松崎 浩之, Yair Rosentha, Samantha Bova,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] Anthropocene signals recorded as Plutonium isotopes and Cesium-137 in Beppu Bay marine sediments, Eastern Kyushu, Japan.2021

    • Author(s)
      横山 祐典, ティムス スティーブン, ミカエラ フローリッヒ, 阿瀬 貴博, ファイフィールド キース, 平林 頌子, ノール ドミニク, 加 三千宣, 宮入 陽介, シュテファン パヴェティヒ,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] Examining MIS 5e Sea-Levels around Japan: 60+ Years of Sea-Level Proxy Analysis and Applied Dating Techniques2021

    • Author(s)
      Evan Tam, Yusuke Yokoyama,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] Glacial_interglacial variations in the Leeuwin Current for the last 50,000 years based on Nd isotope records of benthic foraminifers2021

    • Author(s)
      若公 良太, 高柳 栄子, 若木 重行, 石輪 健樹, 横山 祐典, 若木 仁美, 石川 剛志, 井龍 康文,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] High-resolution marine surface Δ14C reconstructions using marine organisms produced carbonate attached to tetrapod ashored by high-wave in northern Pacific Coast of Japan.2021

    • Author(s)
      レゲット 佳, 横山 祐典, 宮入 陽介, 太田 耕輔, 白濱 吉起,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] 北海道,根室半島における海成段丘上の湿原の形成年代2021

    • Author(s)
      近藤 玲介, 横地 穣, 井上 京, 金子 和広, 冨士田 裕子, 隅田 まり, 宮入 陽介, 横山 祐典,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] 北海道東部根釧台地茶内地域の小規模湿原における完新世の湿地堆積環境の変遷2021

    • Author(s)
      常岡 廉, 横山 祐典, 近藤 玲介, 太田 耕輔, 横地 穣, 金子 和広3, 冨士田 裕子, 井上 京, 紀藤 典夫, 隅田 まり, 植村 杏太, 宮入 陽介, 百原 新,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] Radiocarbon Variability Recorded in Coral from Kikai Island to Understand Oceanography in the North Pacific Region2021

    • Author(s)
      Yuning Zeng, Yusuke Yokoyama, Yosuke Miyairi, Shoko Hirabayashi, Atsushi Suzuki,
    • Organizer
      日本地球惑星科学連合2021年大会
    • Invited
  • [Presentation] Beryllium isotope records from sectors of the West and East Antarctic Ice sheet reveal Holocene melting related to the incursion of Circumpolar Deep Water2021

    • Author(s)
      Adam David Sproson, Yusuke Yokoyama, Yoshinori Takano, Rebecca Minzoni, Bethany Behrens, Yosuke Miyairi, Takahiro Aze,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] Evolution of Mg transporters and their possible effects on coral skeletal proxies in geochemistry2021

    • Author(s)
      Tomoko Bell, Akira Iguchi, Kazuhiko Sakai, Yusuke Yokoyama,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] Periods of local melt during the Holocene at Terre Adelie, East Antarctica revealed by beryllium isotope ratios2021

    • Author(s)
      Bethany Behrens, Yusuke Yokoyama, Yosuke Miyairi, Adam David Sproson, Masako Yamane,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] 吉里吉里地域における古津波履歴の再検討2021

    • Author(s)
      石澤 尭史, 横山 祐典, 宮入 陽介,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] 北海道えりも地域で確認された津波堆積物層に基づく千島海溝巨大津波の対比検討2021

    • Author(s)
      中西 諒, 芦 寿一郎, 宮入 陽介, 横山 祐典,
    • Organizer
      日本地球惑星科学連合2021年大会
  • [Presentation] The Mg and Li isotopic compositions of authigenic and detrital sedimentary phases record Antarctic chemical silicate weathering across the EOT2021

    • Author(s)
      Adam David Sproson, Toshihiro Yoshimura, Takahiro Aze, Shigeyuki Wakaki, Tsuyoshi Ishikawa, Yusuke Yokoyama, Nao Ohkouchi
    • Organizer
      Goldschmidt2021
    • Int'l Joint Research
  • [Presentation] Fluctuation of marine osmium isotope ratio during the Quaternary climate cycles2021

    • Author(s)
      Yusuke Kuwahara, Kazutaka Yasukawa, Koichiro Fujinaga, Tatsuo Nozaki, Junichiro Ohta, Honami Sato, Jun-Ichi Kimura, Kentaro Nakamura, Yusuke Yokoyama, Yasuhiro Kato
    • Organizer
      Goldschmidt2021
    • Int'l Joint Research
  • [Presentation] Compound Specific, flow cytometry-based-pollen, and other radiocarbon environmental researches using a Single Stage Accelerator Mass Spectrometry at the Atmosphere and Ocean Research Institute, The University of Tokyo2021

    • Author(s)
      Yusuke Yokoyama,T. Aze, Y. Miyairi, C. Sawada, S. Hirabayashi, K. Ota, Y. Ando, S. Izawa & Y. Ueno
    • Organizer
      3rd International Radiocarbon in the Environment Conference
    • Int'l Joint Research / Invited
  • [Presentation] 大型底生有孔虫を用いた完新世における海草藻場環境の復元2021

    • Author(s)
      佐野亘・藤田和彦・横山祐典・宮入陽介・平林頌子・中野義勝・磯村尚子・菅浩伸
    • Organizer
      日本第四紀学会2021大会
  • [Presentation] 表面照射年代測定を用いた足摺岬における隆起ベンチの編年2021

    • Author(s)
      白濱吉起・宮入陽介・横山祐典・阿部恒平
    • Organizer
      日本第四紀学会2021大会
  • [Presentation] 宇宙線生成核種10Beを用いた南東太平洋(チリ沖)における完新世の古気候復元2021

    • Author(s)
      根本夏林・横山祐典・Adam Sproson・宮入陽介・阿瀬貴博・松崎浩之・Yair Rosenthal・Samantha Bova
    • Organizer
      日本第四紀学会2021大会
  • [Presentation] 福江島山内盆地における中期更新世以降の層序・発達史・大型植物化石群(予報)2021

    • Author(s)
      近藤玲介・高場智博・西内李佳・植村杏太・長井雅史・宮入陽介・横山祐典・坂本竜彦
    • Organizer
      日本第四紀学会2021大会
  • [Presentation] 静岡県相良低地で掘削したコア試料の分析に基づく完新世中期の環境変化の復元2021

    • Author(s)
      太田耕輔・藤原治・Stephen Obrochta・宮入陽介・横山祐典
    • Organizer
      日本第四紀学会2021大会
  • [Presentation] 北海道東部,根釧台地上の小規模湿原における完新世の堆積環境の変遷2021

    • Author(s)
      常岡廉・横山祐典・太田耕輔・宮入陽介・近藤玲介・横地穣・金子和広・井上京・紀藤典夫・植村杏太・隅田まり・百原新・冨士田裕
    • Organizer
      日本第四紀学会2021大会
  • [Presentation] カンザシゴカイ類を用いた東北太平洋表層海水のΔ14C高精度復元2021

    • Author(s)
      レゲット佳・横山祐典・宮入陽介・太田耕輔・福與直人・白濱吉起
    • Organizer
      日本第四紀学会2021大会
  • [Presentation] イベント層認定における海岸発達史復元の重要性 ~北海道日高海岸の例~2021

    • Author(s)
      中西諒・芦寿一郎・横山祐典・宮入陽介
    • Organizer
      日本第四紀学会2021大会
  • [Presentation] サンゴ骨格中の放射性炭素から探る黒潮変動2021

    • Author(s)
      平林頌子・横山祐典・鈴木淳・宮入陽介・阿瀬貴博・シリンガンフェルナンド・前田保夫
    • Organizer
      日本第四紀学会2021大会
  • [Presentation] サンゴ骨格が記録する人新世の環境変化2021

    • Author(s)
      横山祐典
    • Organizer
      日本サンゴ礁学会
    • Invited
  • [Presentation] A rapid and precise method of establishing age model for coral skeletal radiocarbon to study surface oceanography using coupled X-ray photos and ICP-AES measurement2021

    • Author(s)
      Yuning Zeng, Yusuke Yokoyama, Shoko Hirabayashi, Yosuke Miyairi, Atsushi Suzuki, Takahiro Aze
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] A novel in-situ C-14 extraction system for surface exposure dating to reconstruct the past Antarctic ice sheet2021

    • Author(s)
      Yusuke Shimizu, Yusuke Yokoyama, Yosuke Miyairi, Masako Yamane
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] Fish habitat study using radiocarbon of otoliths with stepwise dissolution technique2021

    • Author(s)
      Yosuke Miyairi, Yusuke Yokoyama, Toshi Nagata
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] Long term monthly measurements on water dissolved inorganic radiocarbon to understand the seasonal radiocarbon changes in three of Fuji Five lakes, Japan2021

    • Author(s)
      Kosuke Ota, Yusuke Yokoyama, Yosuke Miyairi, Shinya Yamamoto, Toshihiro Miyajima
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] 14C dating correction method for tectonically active complex deep marine environments at cold seep vents off Eastern Japan: Seawater DIC acquisition by Calpyptogena sp. bivalves2021

    • Author(s)
      Kazuhiro Yagasaki, Juichiro Ashi, Yusuke Yokoyama, Stephen Obrochta, Yosuke Miyairi, Shin’ichi Kuramoto
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] A reinvestigation of lagoon specific local marine reservoir effects in Tongatapu, the Kingdom of Tonga, over the last 3000 years2021

    • Author(s)
      Naoto Fukuyo, Geoffrey Clark, Yusuke Yokoyama
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] Age Offsets between Radiocarbon Sample Materials, and Sedimentation Rate Based Holocene Sea-level Change Captured in Ocean Sediment Cores from Ube City, Yamaguchi Prefecture, Japan2021

    • Author(s)
      Evan Tam, Yusuke Yokoyama, Yukari Miyashita, Yosuke Miyairi, and Milne., G.
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] Ages of Pleistocene marine terraces in the south coast of Japan using in situ cosmogenic 10Be and 26Al2021

    • Author(s)
      Yusuke Yokoyama, Atsunori Nakamura, Gen Nagano, Hideaki Maemoku, Yosuke Miyairi, Hiroyuki Matsuzak
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] Efficient radiocarbon measurements on marine and terrestrial samples with a single stage Accelerator Mass Spectrometry at the Atmosphere and Ocean Research Institute, University of Tokyo2021

    • Author(s)
      Yusuke Yokoyama, Yosuke Miyairi, Takahiro Aze, Chikako Sawada, Yuka Ando, Satomi Izawa, Yoshiko Ueno, Shoko Hirabayashi, Naoto Fukuyo, Kosuke Ota, Yusuke Shimizu, Yuning Zeng, Ren Tsuneoka, Kozue Ando, Toshi Nagat
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] Evaluation of uranium-thorium dating and radiocarbon measurement potentials using marine mollusks2021

    • Author(s)
      Shoko Hirabayashi, Takahiro Aze, Yosuke Miyairi, Hironobu Kan, Yusuke Yokoyama
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] Improvement in analysis of dissolved organic radiocarbon in seawater: Evaluation method of accuracy2021

    • Author(s)
      Shigeyoshi Otosaka, Hyunduck Jeon, Yunxuan Hou, Yusuke Yokoyama, Yosuke Miyairi, Takahiro Aze, Takahiro Watanabe, Hiroshi Ogawa
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] Small scale wetland based sedimentary environmental change during the Holocene on the Konsen Plateau, eastern Hokkaido, Japan based on TOC and flowcytometry-pollen radiocarbon dating2021

    • Author(s)
      Ren Tsuneoka, Yusuke Yokoyama, Kosuke Ota, Yosuke Miyairi, Reisuke Kondo, Minoru Yokochi, Kazuhiro Kaneko, Takashi Inoue, Norio Kito, Kyota Uemura, Mari Sumita, Arata Momohara, Hiroko Fujita
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] Testing the potential of Serpulidae tubes as an indicator of past relative sea level at higher latitude coast using shored wave dissipating blocks along the northern Pacific coast of Japan2021

    • Author(s)
      Kai Leggett, Yusuke Yokoyama, Yosuke Miyairi, Kosuke Ota, Naoto Fukuyo, Yoshiki Shirahama
    • Organizer
      AMS-15
    • Int'l Joint Research
  • [Presentation] Radiocarbon Variability Recorded in Coral from Kikai Island to Understand Oceanography in the North Western Pacific Region2021

    • Author(s)
      Yuning Zeng, Yusuke Yokoyama, Shoko Hirabayashi, Yosuke Miyairi, Atsushi Suzuki and Takahiro Aze
    • Organizer
      AGU fall meeting2021
    • Int'l Joint Research

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Published: 2022-12-28  

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