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2020 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

研究実績の概要
海洋堆積物に記録された過去の海流および陸源堆積物のシグナルについて、研究者らが開発した手法を使って分析を進めた。この装置を使った分析が、世界でもかなり限られた研究室でないと実施できないため、データの精度を担保することは重要である。東京大学の装置および研究協力者の海外での設備を使ったクロスチェックを行う予定だったものが、受け入れ側の都合で延期されたため、今回の経費を用いて実施をした。装置の構成が大きく異なるために、前処理にあたる化学処理のステップも、二つのラボで必ずしも完全に一致していないため、データの精度と確度の検討を詳細に行う必要がある。国際的に使われている標準物質を複数測定し、その結果を比較検討することで、どちらの研究グループでも問題なく正確なデータが出されていることが確認できた。つまり、東京大学で出されたデータと研究協力者のグループで出された結果は、再現性に問題がないことが明らかとなった。南半球で採取された試料の分析を進めていけることが確認された。並行して得られた成果の一部は学会で発表するとともに、国際誌に投稿した。また過去の気候変動と陸域および極域環境の変化と風化侵食との関係について文献調査を進めるとともに、古気候に関する知見について論文にまとめた。また年代測定の精度を上げるべく、放射性炭素分析の前処理装置の改良を進め、より微量でも安定したシグナルが加速器において分析できるような改良を行った。

Current Status of Research Progress
Current Status of Research Progress

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

Reason

コロナ禍によってさまざまな活動が制限され、国内では実験室への立ち入りが、計画通り実行できずに分析速度を落とさねばならなかったり、海外への渡航が禁止されたりすることで、当初の予定位通りとまではいっていないものの、その中で工夫をこらして、データの分析を進めていきその結果が出てきているため。

Strategy for Future Research Activity

いまだにコロナ禍から解放されている状況ではないため、またいつ実験室への立ち入りが制限される状況が生じるかわからない。しかし昨年度までより改善しており、かつこれまでの経験から、作業を分割して研究遂行を行う手段にある程度目処がついたため、計画に従って分析データを蓄積しつつ、得られた成果については滞りなく論文化していくべく努力していく。

  • Research Products

    (66 results)

All 2021 2020

All Journal Article (18 results) (of which Int'l Joint Research: 18 results,  Peer Reviewed: 18 results,  Open Access: 18 results) Presentation (47 results) (of which Int'l Joint Research: 17 results,  Invited: 5 results) Book (1 results)

  • [Journal Article] Origin of Deep Methane Associated with a Unique Community of Microorganisms in an Organic- and Iodine-Rich Aquifer2021

    • Author(s)
      Urai Atsushi、Takano Yoshinori、Imachi Hiroyuki、Ishii Shun’ichi、Matsui Yohei、Ogawara Miyuki、Tasumi Eiji、Miyairi Yosuke、Ogawa Nanako O.、Yoshimura Toshihiro、Inagaki Fumio、Yokoyama Yusuke、Kawano Kenjiro、Murai Daisuke、Park Ho-Dong、Ohkouchi Naohiko
    • Journal Title

      ACS Earth and Space Chemistry

      Volume: 5 Pages: 1~11

    • DOI

      10.1021/acsearthspacechem.0c00204

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Initial measurement of beryllium‐9 using high‐resolution inductively coupled plasma mass spectrometry allows for more precise applications of the beryllium isotope system within the Earth Sciences2021

    • Author(s)
      Sproson Adam D.、Aze Takahiro、Behrens Bethany、Yokoyama Yusuke
    • Journal Title

      Rapid Communications in Mass Spectrometry

      Volume: 35 Pages: e9059

    • DOI

      10.1002/rcm.9059

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Chronostratigraphy of a 270-ka sediment record from Lake Selina, Tasmania: Combining radiometric, geomagnetic and climatic dating2021

    • Author(s)
      Lis?-Pronovost Agathe、Fletcher Michael-Shawn、Simon Quentin、Jacobs Zenobia、Gadd Patricia S.、Heslop David、Herries Andy I.R.、Yokoyama Yusuke、team Aster
    • Journal Title

      Quaternary Geochronology

      Volume: 62 Pages: 101152~101152

    • DOI

      10.1016/j.quageo.2021.101152

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Beryllium isotopes in sediments from Lake Maruwan Oike and Lake Skallen, East Antarctica, reveal substantial glacial discharge during the late Holocene2021

    • Author(s)
      Sproson Adam D.、Takano Yoshinori、Miyairi Yosuke、Aze Takahiro、Matsuzaki Hiroyuki、Ohkouchi Naohiko、Yokoyama Yusuke
    • Journal Title

      Quaternary Science Reviews

      Volume: 256 Pages: 106841~106841

    • DOI

      10.1016/j.quascirev.2021.106841

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Rapid coupling between solid earth and ice volume during the Quaternary2021

    • Author(s)
      Kuwahara Yusuke、Yasukawa Kazutaka、Fujinaga Koichiro、Nozaki Tatsuo、Ohta Junichiro、Sato Honami、Kimura Jun-Ichi、Nakamura Kentaro、Yokoyama Yusuke、Kato Yasuhiro
    • Journal Title

      Scientific Reports

      Volume: 11 Pages: 5695

    • DOI

      10.1038/s41598-021-84448-7

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] High spatial resolution magnetic mapping using ultra-high sensitivity scanning SQUID microscopy on a speleothem from the Kingdom of Tonga, southern Pacific2021

    • Author(s)
      Fukuyo Naoto、Oda Hirokuni、Yokoyama Yusuke、Clark Geoffrey、Yamamoto Yuhji
    • Journal Title

      Earth, Planets and Space

      Volume: 73 Pages: 77

    • DOI

      10.1186/s40623-021-01401-8

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Holocene sea level reconstruction using lagoon specific local marine reservoir effect and geophysical modeling in Tongatapu, Kingdom of Tonga2020

    • Author(s)
      Fukuyo Naoto、Clark Geoffrey、Purcell Anthony、Parton Phillip、Yokoyama Yusuke
    • Journal Title

      Quaternary Science Reviews

      Volume: 244 Pages: 106464~106464

    • DOI

      10.1016/j.quascirev.2020.106464

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Last Abundant Appearance Datum of Hemidiscus karstenii driven by climate change2020

    • Author(s)
      Crosta Xavier、Shukla Sunil Kumar、Ther Olivier、Ikehara Minoru、Yamane Masako、Yokoyama Yusuke
    • Journal Title

      Marine Micropaleontology

      Volume: 157 Pages: 101861~101861

    • DOI

      10.1016/j.marmicro.2020.101861

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Dating tsunami deposits: Present knowledge and challenges2020

    • Author(s)
      Ishizawa Takashi、Goto Kazuhisa、Yokoyama Yusuke、Goff James
    • Journal Title

      Earth-Science Reviews

      Volume: 200 Pages: 102971~102971

    • DOI

      10.1016/j.earscirev.2019.102971

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Reconstruction of temperature experienced by Pacific bluefin tuna Thunnus orientalis larvae using SIMS and microvolume CF-IRMS otolith oxygen isotope analyses2020

    • Author(s)
      Hane Y、Kimura S、Yokoyama Y、Miyairi Y、Ushikubo T、Ishimura T、Ogawa N、Aono T、Nishida K
    • Journal Title

      Marine Ecology Progress Series

      Volume: 649 Pages: 175~188

    • DOI

      10.3354/meps13451

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Eurasian Ice Sheet collapse was a major source of Meltwater Pulse 1A 14,600 years ago2020

    • Author(s)
      Brendryen Jo、Haflidason Haflidi、Yokoyama Yusuke、Haaga Kristian Agas?ster、Hannisdal Bjarte
    • Journal Title

      Nature Geoscience

      Volume: 13 Pages: 363~368

    • DOI

      10.1038/s41561-020-0567-4

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Deltaic response to climate change: The Holocene history of the Nueces Delta2020

    • Author(s)
      Rice Johnathan A.、Simms Alexander R.、Buzas-Stephens Pamela、Steel Elisabeth、Livsey Daniel、Reynolds Laura C.、Yokoyama Yusuke、Halihan Todd
    • Journal Title

      Global and Planetary Change

      Volume: 191 Pages: 103213~103213

    • DOI

      10.1016/j.gloplacha.2020.103213

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Seismic history of a bedrock fault scarp using quantitative morphology together with multiple dating methods: A case study of the Luoyunshan piedmont fault, southwestern Shanxi Rift, China2020

    • Author(s)
      Zou Junjie、He Honglin、Yokoyama Yusuke、Shirahama Yoshiki、Sproson Adam D.、Wei Zhanyu、Shi Feng、Hao Haijian、Miyairi Yosuke、L? Lixing、Su Peng、Zhou Chao
    • Journal Title

      Tectonophysics

      Volume: 788 Pages: 228473~228473

    • DOI

      10.1016/j.tecto.2020.228473

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] The challenges of constraining shelf sea tidal models using seabed sediment grain size as a proxy for tidal currents2020

    • Author(s)
      Ward Sophie L.、Scourse James D.、Yokoyama Yusuke、Neill Simon P.
    • Journal Title

      Continental Shelf Research

      Volume: 205 Pages: 104165~104165

    • DOI

      10.1016/j.csr.2020.104165

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Organic carbon accumulation and productivity over the past 130?years in Lake Kawaguchi (central Japan) reconstructed using organic geochemical proxies2020

    • Author(s)
      Yamamoto S、Hubert-Ferrari A、Lamair L、Miyata Y、Ochiai S、Nagao S、Miyauchi N、Yoshida K、Fujiwara O、Yokoyama Y、Heyvaert Vanessa M. A.、De Batist M、Boes E.、Bruckner H.、De Rycker K.、Garrett E.、Miyairi Y.、Nakamura A.、Obrochta S.、Riedesel S.、Shishikura M.、Walstra J.、The QuakeRecNankai Team
    • Journal Title

      Journal of Paleolimnology

      Volume: 64 Pages: 365~377

    • DOI

      10.1007/s10933-020-00142-0

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Alkenone surface hydrographic changes of the subarctic Northwestern Pacific since the last glacial: proxy limitations and implications of non-thermal environmental influences2020

    • Author(s)
      Yu Pai-Sen、Liao Chia-Ju、Chen Min-Te、Zou Jian-Jun、Shi Xuefa、Bosin A. A.、Gorbarenko Sergey A.、Yokoyama Yusuke
    • Journal Title

      Progress in Earth and Planetary Science

      Volume: 7 Pages: 22

    • DOI

      10.1186/s40645-020-00339-x

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Surface Ocean Hydrographic Changes in the Western Pacific Marginal Seas Since the Early Holocene2020

    • Author(s)
      Pan Hui-Juan、Chen Min-Te、Kong Deming、Lin Xiaopei、Wong Kuo-Tsan、Tsai Hung-Ling、Liu Shengfa、Shi Xuefa、Yokoyama Yosuke
    • Journal Title

      Frontiers in Earth Science

      Volume: 8 Pages: 1~10

    • DOI

      10.3389/feart.2020.00200

    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Controls on the spatio-temporal distribution of microbialite crusts on the Great Barrier Reef over the past 30,000?years2020

    • Author(s)
      Szilagyi Zs.、Webster Jody M.、Patterson Madhavi A.、Hips Kinga、Riding Robert、Foley Matthew、Humblet Marc、Yokoyama Yusuke、Liang Liyuan、Gischler Eberhard、Montaggioni Lucien、Gherardi Douglas、Braga Juan C.
    • Journal Title

      Marine Geology

      Volume: 429 Pages: 106312~106312

    • DOI

      10.1016/j.margeo.2020.106312

    • 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
  • [Book] 地球・惑星・生命2020

    • Author(s)
      日本地球惑星科学連合
    • Total Pages
      280
    • Publisher
      東京大学出版会
    • ISBN
      9784130637152

URL: 

Published: 2022-12-28  

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