Updated on 2024/10/05

写真a

 
UEMURA Ryu
 
Organization
Graduate School of Environmental Studies Department of Earth and Environmental Sciences Climate Science Associate professor
Graduate School
Graduate School of Environmental Studies
Undergraduate School
School of Science Department of Earth and Planetary Science
Title
Associate professor

Degree 1

  1. Doctor of Science ( 2005.3   Tokyo Institute of Technology ) 

Research Interests 6

  1. Paleoclimate

  2. Geochemistry

  3. Speleothem

  4. Stable isotope

  5. Analytical chemistry

  6. Ice core

Research Areas 2

  1. Environmental Science/Agriculture Science / Environmental dynamic analysis

  2. Natural Science / Atmospheric and hydrospheric sciences

Research History 5

  1. 国立大学法人 名古屋大学   環境学研究科   准教授

    2019.4

  2. 国立大学法人 琉球大学   理学部 海洋自然科学科   准教授

    2013.4 - 2019.3

  3. University of the Ryukyus   Assistant Professor

    2010.4 - 2013.3

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    Country:Japan

  4. Laboratoire des Sciences du Climat et de l'Environnement (LSCE), CEA-CNRS

    2008 - 2010

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    Country:France

  5. National Insititute of Polar Research

    2005 - 2008

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    Country:Japan

Professional Memberships 5

  1. 日本地球惑星科学連合

    2011

  2. 日本地球化学会

  3. 日本第四紀学会

  4. 日本雪氷学会

  5. American Geophysical Union

Committee Memberships 9

  1. 情報・システム研究機構 国立極地研究所 アイスコア研究委員会   委員  

    2024.4   

  2. 地球環境史学会   評議員  

    2024.4   

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    Committee type:Academic society

  3. 情報・システム研究機構 国立極地研究所   情報・システム研究機構 国立極地研究所 国際極域・地球環境研究推進センター(IPERC)特別共同研究委員会委員  

    2023.4   

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    Committee type:Other

  4. 公益社団法人 日本雪氷学会   関東・中部・西日本支部理事  

    2023.4   

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    Committee type:Academic society

  5. 情報・システム研究機構 国立極地研究所   南極観測計画アドバイザリーボード アドバイザー  

    2022.4   

  6.   Polar Data Journal Editorial board  

    2019.4   

  7. 国立極地研究所, 南極観測審議委員会 重点研究観測専門部会   極観測審議委員会 重点研究観測専門部会 委員  

    2018.4 - 2020.3   

  8. 日本雪氷学会   「雪氷」編集委員会 委員  

    2017.6 - 2023.3   

  9. 情報・システム研究機構 国立極地研究所   ドームふじアイスコアコンソーシアム 運営委員  

    2013.4 - 2023.3   

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Awards 4

  1. 地球環境史学会 優秀発表賞

    2023.12   地球環境史学会   石筍コア試料の同位体分析による沖縄県南大東島における過去9万年間の気候変動

    有村 悠汰, 植村 立, Syed Azharuddin, 阿部 理, 浅海 竜司, Yuan Shufeng, Chin Hahjung, Wang Xianfeng

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    Award type:Award from Japanese society, conference, symposium, etc. 

  2. プロフェッサー・オブ・ザ・イヤー

    2012.1   琉球大学  

    植村 立

  3. 日本第四紀学会奨励賞

    2008.8   日本第四紀学会  

    植村 立

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    Award type:Award from Japanese society, conference, symposium, etc. 

  4. Best Poster Presentation at ESF-JSPS Frontier Science Meeting for Young Researchers, "Climate Change"

    2006.6   ESF-JSPS  

    Ryu Uemura

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    Award type:Award from international society, conference, symposium, etc.  Country:Sweden

 

Papers 58

  1. A snapshot of the climate in the Middle Pleistocene inferred from a stalagmite from central Japan Reviewed

    Masataka Sakai, Masako Hori, Ryu Uemura, Bassam Ghaleb, Daniele Pinti, Mahiro Yumiba, Masafumi Murayama, Akihiro Kano

    Geoscience Letters   Vol. 11   page: 41   2024.9

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1186/s40562-024-00357-3

  2. SE-Dome II ice core dating with half-year precision: Increasing melting events from 1799 to 2020 in southeastern Greenland Reviewed

    Kaoru Kawakami, Yoshinori Iizuka, Mahiro Sasage, Mai Matsumoto, Takeshi Saito, Akira Hori, Sakiko Ishino, Shuji Fujita, Koji Fujita, Keita Takasugi, Takumi Hatakeyama, Saaya Hamamoto, Akihisa Watari, Nao Esashi, Miu Otsuka, Ryu Uemura, Kazuho Horiuchi, Masahiro Minowa, Shohei Hattori, Teruo Aoki, Motohiro Hirabayashi, Kenji Kawamura, Sumito Matoba

    Journal of Geophysical Research: Atmospheres   Vol. 128   page: e2023JD038874   2023.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1029/2023JD038874

    DOI: https://doi.org/10.1029/2023JD038874

  3. The noble gas and nitrogen relationship between Ryugu and carbonaceous chondrites Reviewed International coauthorship

    David J. Byrne; Evelyn Füri; Laurent Zimmermann; Bernard Marty; Ryuji Okazaki; Toru Yada; Fumio Kitajima; Shogo Tachibana; Kasumi Yogata; Kanako Sakamoto; Hisayoshi Yurimoto; Tomoki Nakamura; Takaaki Noguchi; Hiroshi Naraoka; Hikaru Yabuta; Sei-ichiro Watanabe; Yuichi Tsuda; Masahiro Nishimura; Aiko Nakato; Akiko Miyazaki; Masanao Abe; Tatsuaki Okada; Tomohiro Usui; Makoto Yoshikawa; Takanao Saiki; Satoshi Tanaka; Fuyuto Terui; Satoru Nakazawa; Henner Busemann; Ko Hashizume; Jamie D. Gilmour; Alex Meshik; My E. I. Reibe; Daniela Krietsch; Colin Maden; Akizumi Ishida; Patricia L. Clay; Sarah A. Crowther; Lydia Fawcett; Thomas Lawton; Olga Pravdivtseva; Yayoi N. Miura; Jisun Park; Ken-ichi Bajo; Yoshinori Takano; Keita Yamada; Shinsuke Kawagucci; Yohei Matsui; Mizuki Yamamoto; Kevin Righter; Saburo Sakai; Naoyoshi Iwata; Naoki Shirai; Shun Sekimoto; Makoto Inagaki; Mitsuru Ebihara; Reika Yokochi; Kunihiko Nishiizumi; Keisuke Nagao; Jong Ik Lee; Akihiro Kano; Marc, W. Caffee; Ryu Uemura

    Geochimica et Cosmochimica Acta   Vol. 345   page: 62 - 74   2023.3

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    Authorship:Last author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.gca.2023.01.020

  4. Noble gases and nitrogen in samples of asteroid Ryugu record its volatile sources and recent surface evolution Reviewed International coauthorship

    Ryuji Okazaki, Bernard Marty, Henner Busemann, Ko Hashizume, Jamie D. Gilmour, Alex Meshik, Toru Yada, Fumio Kitajima, Michael W. Broadley, David Byrne, Evelyn Füri, My E. I. Riebe, Daniela Krietsch, Colin Maden, Akizumi Ishida, Patricia Clay, Sarah A. Crowther, Lydia Fawcett, Thomas Lawton, Olga Pravdivtseva, Yayoi N. Miura, Jisun Park, Ken-ichi Bajo, Yoshinori Takano, Keita Yamada, Shinsuke Kawagucci, Yohei Matsui, Mizuki Yamamoto, Kevin Righter, Saburo Sakai, Naoyoshi Iwata, Naoki Shirai, Shun Sekimoto, Makoto Inagaki, Mitsuru Ebihara, Reika Yokochi, Kunihiko Nishiizumi, Keisuke Nagao, Jong Ik Lee, Akihiro Kano, Marc W. Caffee, Ryu Uemura, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Hikaru Yabuta, Hisayoshi Yurimoto, Shogo Tachibana, Hirotaka Sawada, Kanako Sakamoto, Masanao Abe, Masahiko Arakawa, Atsushi Fujii, Masahiko Hayakawa, Naoyuki Hirata, Naru Hirata, Rie Honda, Chikatoshi Honda, Satoshi Hosoda, Yu-ichi Iijima, Hitoshi Ikeda, Masateru Ishiguro, Yoshiaki Ishihara, Takahiro Iwata, Kosuke Kawahara, Shota Kikuchi, Kohei Kitazato, Koji Matsumoto, Moe Matsuoka, Tatsuhiro Michikami, Yuya Mimasu, Akira Miura, Tomokatsu Morota, Satoru Nakazawa, Noriyuki Namiki, Hirotomo Noda, Rina Noguchi, Naoko Ogawa, Kazunori Ogawa, Tatsuaki Okada, Chisato Okamoto, Go Ono, Masanobu Ozaki, Takanao Saiki, Naoya Sakatani, Hiroki Senshu, Yuri Shimaki, Kei Shirai, Seiji Sugita, Yuto Takei, Hiroshi Takeuchi, Satoshi Tanaka, Eri Tatsumi, Fuyuto Terui, Ryudo Tsukizaki, Koji Wada, Manabu Yamada, Tetsuya Yamada, Yukio Yamamoto, Hajime Yano, Yasuhiro Yokota, Keisuke Yoshihara, Makoto Yoshikawa, Kent Yoshikawa, Shizuho Furuya, Kentaro Hatakeda, Tasuku Hayashi, Yuya Hitomi, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Hiromichi Soejima, Ayako Iwamae, Daiki Yamamoto, Kasumi Yogata, Miwa Yoshitake, Ryota Fukai, Tomohiro Usui, Harold C. Connolly, Dante Lauretta, Sei-ichiro Watanabe and Yuichi Tsuda

    Science   Vol. 379 ( 6634 ) page: eabo0431   2023.2

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1126/science.abo0431

  5. Development of Cavity Ring-down Spectrometer for Tritiated/Heavy Water Samples

    Kazuki Iwamoto, Keisuke Saito, Yuta Suzuki, Ryu Uemura, Osamu Abe, Hisashi Abe, Norihiko Nishizawa, and Hideki Tomita

    Proceedings of Optica Advanced Photonics Congress 2022     2022.12

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    Language:English   Publishing type:Research paper (international conference proceedings)  

    DOI: 10.1364/ASSL.2022.JTu6A.7

  6. First asteroid gas sample delivered by the Hayabusa2 mission: A treasure box from Ryugu Reviewed International coauthorship

    Ryuji Okazaki, Yayoi N. Miura, Yoshinori Takano, Hirotaka Sawada, Kanako Sakamoto, Toru Yada, Keita Yamada, Shinsuke Kawagucci, Yohei Matsui, Ko Hashizume, Akizumi Ishida, Michael W. Broadley, Bernard Marty, David Byrne, Evelyn Füri, Alex Meshik, Olga Pravdivtseva, Henner Busemann, My E.I. Riebe, Jamie Gilmour, Jisun Park, Ken-ichi Bajo, Kevin Righter, Saburo Sakai, Shun Sekimoto, Fumio Kitajima, Sarah A. Crowther, Naoyoshi Iwata, Naoki Shirai, Mitsuru Ebihara, Reika Yokochi, Kunihiko Nishiizumi, Keisuke Nagao, Jong Ik Lee, Patricia Clay, Akihiro Kano, Marc W. Caffee, Ryu Uemura, Makoto Inagaki, Daniela Krietsch, Colin Maden, Mizuki Yamamoto, Lydia Fawcett, Thomas Lawton, Tomoki Nakamura, Hiroshi Naraoka, Takaaki Noguchi, Hikaru Yabuta, Hisayoshi Yurimoto, Yuichi Tsuda, Sei-ichiro Watanabe, Masanao Abe, Masahiko Arakawa, Atsushi Fujii, Masahiko Hayakawa, Naoyuki Hirata, Naru Hirata, Rie Honda, Chikatoshi Honda, Satoshi Hosoda, Yu-ichi Iijima, Hitoshi Ikeda, Masateru Ishiguro, Yoshiaki Ishihara, Takahiro Iwata, Kosuke Kawahara, Shota Kikuchi, Kohei Kitazato, Koji Matsumoto, Moe Matsuoka, Tatsuhiro Michikami, Yuya Mimasu, Akira Miura, Tomokatsu Morota, Satoru Nakazawa, Noriyuki Namiki, Hirotomo Noda, Rina Noguchi, Naoko Ogawa, Kazunori Ogawa, Tatsuaki Okada, Chisato Okamoto, Go Ono, Masanobu Ozaki, Takanao Saiki, Naoya Sakatani, Hiroki Senshu, Yuri Shimaki, Kei Shirai, Seiji Sugita, Yuto Takei, Hiroshi Takeuchi, Satoshi Tanaka, Eri Tatsumi, Fuyuto Terui, Ryudo Tsukizaki, Koji Wada, Manabu Yamada, Tetsuya Yamada, Yukio Yamamoto, Hajime Yano, Yasuhiro Yokota, Keisuke Yoshihara, Makoto Yoshikawa, Kent Yoshikawa, Shizuho Furuya, Kentaro Hatakeda, Tasuku Hayashi, Yuya Hitomi, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Masahiro Nishimura, Hiromichi Soejima, Ayako Iwamae, Daiki Yamamoto, Kasumi Yogata, Miwa Yoshitake, Ryota Fukai, Tomohiro Usui, Trevor Ireland, Harold C. Connolly Jr., Dante S. Lauretta, and Shogo Tachibana

    Science Advances   Vol. 8   page: eabo7239   2022.10

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1126/sciadv.abo7239

  7. High Flux of Small Sulfate Aerosols During the 1970s Reconstructed From the SE-Dome Ice Core in Greenland Reviewed

    Y. Iizuka, R. Uemura, H. Matsui, N. Oshima, K. Kawakami, S. Hattori, H. Ohno, S. Matoba

    Journal of Geophysical Research-Atmospheres   Vol. 127 ( 17 ) page: e2022JD036880   2022.8

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1029/2022JD036880

  8. Soluble salts in deserts as a source of sulfate aerosols in an Antarctic ice core during the last glacial period Reviewed

    Ryu Uemura, Kosuke Masaka, Yoshinori Iizuka, Motohiro Hirabayashi, Hitoshi Matsui, Risei Matsumoto, Miki Uemura, Koji Fujita, Hideaki Motoyama

    Earth and Planetary Science Letters   Vol. 578   page: 117299   2022.1

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    Authorship:Lead author, Corresponding author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.epsl.2021.117299

  9. Interglacial Antarctic-Southern Ocean climate decoupling due to moisture source area shifts Reviewed International coauthorship International journal

    Landais A., Stenni B., Masson-Delmotte V, Jouzel J., Cauquoin A., Fourre E., Minster B., Selmo E., Extier T., Werner M., Vimeux F., Uemura R., Crotti I, Grisart A.

      Vol. 14 ( 12 ) page: 918   2021.12

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s41561-021-00856-4

    Web of Science

  10. Last glacial temperature reconstructions using coupled isotopic analyses of fossil snails and stalagmites from archaeological caves in Okinawa, Japan Reviewed International coauthorship International journal

    Asami Ryuji, Hondo Rikuto, Uemura Ryu, Fujita Masaki, Yamasaki Shinji, Shen Chuan-Chou, Wu Chung-Che, Jiang Xiuyang, Takayanagi Hideko, Shinjo Ryuichi, Kano Akihiro, Iryu Yasufumi

      Vol. 11 ( 1 ) page: 21922   2021.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s41598-021-01484-z

    Web of Science

    PubMed

  11. Reconstruction of ocean environment time series since the late nineteenth century using sclerosponge geochemistry in the northwestern subtropical Pacific Reviewed International journal

    Asami Ryuji, Matsumori Taketo, Shinjo Ryuichi, Uemura Ryu, Miyaoka Yuki, Mizuyama Masaru, Ise Yuji, Sakamaki Takashi

    PROGRESS IN EARTH AND PLANETARY SCIENCE   Vol. 8 ( 1 )   2021.6

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1186/s40645-021-00434-7

    Web of Science

  12. Isotopic evidence for acidity-driven enhancement of sulfate formation after SO2 emission control. Reviewed International coauthorship International journal

    Hattori S, Iizuka Y, Alexander B, Ishino S, Fujita K, Zhai S, Sherwen T, Oshima N, Uemura R, Yamada A, Suzuki N, Matoba S, Tsuruta A, Savarino J, Yoshida N

      Vol. 7 ( 19 )   2021.5

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1126/sciadv.abd4610

    PubMed

  13. Evaluation of geochemical records as a paleoenvironmental proxy in the hypercalcified demosponge Astrosclera willeyana Reviewed

    Ryuji Asami, Akira Kinjo, Daiki Ohshiro, Tohru Naruse, Masaru Mizuyama, Ryu Uemura, Ryuichi Shinjo, Yuji Ise, Yoshihisa Fujita, Takashi Sakamaki

    Progress in Earth and Planetary Science   Vol. 7 ( 1 )   2020.5

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Springer Science and Business Media LLC  

    DOI: 10.1186/s40645-020-00329-z

    Web of Science

    Other Link: http://link.springer.com/article/10.1186/s40645-020-00329-z/fulltext.html

  14. Experimental evaluation of oxygen isotopic exchange between inclusion water and host calcite in speleothems Reviewed

    Ryu Uemura, Yudai Kina, Chuan-Chou Shen, Kanako Omine

    Climate of the Past   Vol. 16 ( 1 ) page: 17 - 27   2020.1

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    Language:English   Publishing type:Research paper (scientific journal)   Publisher:Copernicus {GmbH}  

    DOI: 10.5194/cp-16-17-2020

    DOI: 10.5194/cp-2019-79

    Web of Science

  15. Reduced marine phytoplankton sulphur emissions in the Southern Ocean during the past seven glacials Reviewed

    Goto-Azuma K, Hirabayashi M, Motoyama H, Miyake T, Kuramoto T, Uemura R, Igarashi M, Iizuka Y, Sakurai T, Horikawa S, Suzuki K, Suzuki T, Fujita K, Kondo Y, Hattori S, Fujii Y

    Nature Communications   Vol. 10   page: 3247   2019.7

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s41467-019-11128-6

    Web of Science

  16. Dominant influence of the humidity in the moisture source region on the 17O-excess in precipitation on a subtropical island Reviewed

    Yuina Uechi, Ryu Uemura

    Earth and Planetary Science Letters   Vol. 513   page: 20-28   2019.2

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.1016/j.epsl.2019.02.012

  17. Marine Isotope Stage 4 in Australasia: A full glacial culminating 65,000 years ago – Global connections and implications for human dispersal Invited Reviewed International coauthorship

    Patrick De Deckker, Lee J Arnold, Sander van der Kaars, Germain Bayon, Jan-Berend W Stuut, Kerstin Perner, Raquel Lopes dos Santos, Ryu Uemura, Martina Demuro

    Quaternary Science Reviews   Vol. 204   page: 187 - 207   2019.1

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.quascirev.2018.11.017

  18. Abrupt ice-age shifts in southern westerly winds and Antarctic climate forced from the north

    Christo Buizert, Michael Sigl, Mirko Severi, Bradley R. Markle, Justin J, We, stein, Joseph, R. McConnell, Joel B. Pedro, Harald Sodemann, Kumiko Goto-Azuma, Kenji Kawamura, Shuji Fujita, Hideaki Motoyama, Motohiro Hirabayashi, Ryu Uemura, Barbara Stenni, Frédéric Parrenin, Feng He, T. J. Fudge, Eric J. Steig

    Nature   Vol. 563 ( 7733 ) page: 681 - 685   2018.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    © 2018, Springer Nature Limited. The mid-latitude westerly winds of the Southern Hemisphere play a central role in the global climate system via Southern Ocean upwelling 1 , carbon exchange with the deep ocean 2 , Agulhas leakage (transport of Indian Ocean waters into the Atlantic) 3 and possibly Antarctic ice-sheet stability 4 . Meridional shifts of the Southern Hemisphere westerly winds have been hypothesized to occur 5,6 in parallel with the well-documented shifts of the intertropical convergence zone 7 in response to Dansgaard–Oeschger (DO) events— abrupt North Atlantic climate change events of the last ice age. Shifting moisture pathways to West Antarctica 8 are consistent with this view but may represent a Pacific teleconnection pattern forced from the tropics 9 . The full response of the Southern Hemisphere atmospheric circulation to the DO cycle and its impact on Antarctic temperature remain unclear 10 . Here we use five ice cores synchronized via volcanic markers to show that the Antarctic temperature response to the DO cycle can be understood as the superposition of two modes: a spatially homogeneous oceanic ‘bipolar seesaw’ mode that lags behind Northern Hemisphere climate by about 200 years, and a spatially heterogeneous atmospheric mode that is synchronous with abrupt events in the Northern Hemisphere. Temperature anomalies of the atmospheric mode are similar to those associated with present-day Southern Annular Mode variability, rather than the Pacific–South American pattern. Moreover, deuterium-excess records suggest a zonally coherent migration of the Southern Hemisphere westerly winds over all ocean basins in phase with Northern Hemisphere climate. Our work provides a simple conceptual framework for understanding circum-Antarctic temperature variations forced by abrupt Northern Hemisphere climate change. We provide observational evidence of abrupt shifts in the Southern Hemisphere westerly winds, which have previously documented 1–3 ramifications for global ocean circulation and atmospheric carbon dioxide. These coupled changes highlight the necessity of a global, rather than a purely North Atlantic, perspective on the DO cycle.

    DOI: 10.1038/s41586-018-0727-5

    Scopus

    PubMed

  19. A 180-year-long isotopic record of tree-ring cellulose on Okinawa Island, Japan Reviewed

    Ryu Uemura, Miki Uemura, Masaki Sano, Takeshi Nakatsuka

    Geochemical Journal   Vol. 52 ( 6 ) page: e21 - e27   2018.11

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.2343/geochemj.2.0543

  20. Asynchrony between Antarctic temperature and CO2 associated with obliquity over the past 720,000 years Reviewed

    Uemura Ryu, Motoyama Hideaki, Masson-Delmotte Valerie, Jouzel Jean, Kawamura Kenji, Goto-Azuma Kumiko, Fujita Shuji, Kuramoto Takayuki, Hirabayashi Motohiro, Miyake Takayuki, Ohno Hiroshi, Fujita Koji, Abe-Ouchi Ayako, Iizuka Yoshinori, Horikawa Shinichiro, Igarashi Makoto, Suzuki Keisuke, Suzuki Toshitaka, Fujii Yoshiyuki

    Nature Communications   Vol. 9   2018.3

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/s41467-018-03328-3

    Web of Science

  21. Spatial variation of isotopic compositions of snowpack nitrate related to post-depositional processes in eastern Dronning Maud Land, East Antarctica Reviewed

    Noro Kazushi, Hattori Shohei, Uemura Ryu, Fukui Kotaro, Hirabayashi Motohiro, Kawamura Kenji, Motoyama Hideaki, Takenaka Norimichi, Yoshida Naohiro

    GEOCHEMICAL JOURNAL   Vol. 52 ( 2 ) page: E7-E14   2018.3

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.2343/geochemj.2.0519

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  22. A 60 Year Record of Atmospheric Aerosol Depositions Preserved in a High-Accumulation Dome Ice Core, Southeast Greenland Reviewed

    Yoshinori Iizuka, Ryu Uemura, Koji Fujita, Shohei Hattori, Osamu Seki, Chihiro Miyamoto, Toshitaka Suzuki, Naohiro Yoshida, Hideaki Motoyama, Sumito Matoba

    Journal of Geophysical Research: Atmospheres   Vol. 123 ( 1 ) page: 574 - 589   2018.1

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    Publishing type:Research paper (scientific journal)   Publisher:Wiley-Blackwell  

    ©2017. American Geophysical Union. All Rights Reserved. The Southeastern Greenland Dome (SE-Dome) has both a high elevation and a high accumulation rate (1.01 m we yr−1), which are suitable properties for reconstructing past environmental changes with a high time resolution. For this study, we measured the major ion fluxes in a 90 m ice core drilled from the SE-Dome region in 2015 and present the records of annual ion fluxes from 1957 to 2014. From 1970 to 2010, the trend of nonsea-salt (nss) SO42− flux decreases, whereas that for NH4+ increases, tracking well with the anthropogenic SOx and NH3 emissions mainly from North America. The result suggests that these fluxes reflect histories of the anthropogenic SOx and NH3 emissions. In contrast, the decadal trend of NO3− flux differs from the decreasing trend of anthropogenic NOx emissions. Although the cause of this discrepancy remains unclear, it may be related to changes in particle formation processes and chemical scavenging rates caused by an increase in sea salt and dust and/or a decrease in nssSO42−. We also find a high average NO3− flux (1.13 mmol m−2 yr−1) in the ice core, which suggests a negligible effect from postdepositional NO3− loss. Thus, the SE-Dome region is an excellent location for reconstructing nitrate fluxes. Over a decadal time scale, our NO3− flux record is similar to those from other ice cores in Greenland high-elevation sites, suggesting that NO3− concentration records from these ice cores are reliable.

    DOI: 10.1002/2017JD026733

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

    Web of Science

    Scopus

  23. Seasonal-Scale Dating of a Shallow Ice Core From Greenland Using Oxygen Isotope Matching Between Data and Simulation Reviewed

    Ryoto Furukawa, Ryu Uemura, Koji Fujita, Jesper Sjolte, Kei Yoshimura, Sumito Matoba, Yoshinori Iizuka

    JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES   Vol. 122 ( 20 ) page: 10873 - 10887   2017.10

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    Publishing type:Research paper (scientific journal)   Publisher:AMER GEOPHYSICAL UNION  

    A precise age scale based on annual layer counting is essential for investigating past environmental changes from ice core records. However, subannual scale dating is hampered by the irregular intraannual variabilities of oxygen isotope (delta O-18) records. Here we propose a dating method based on matching the delta O-18 variations between ice core records and records simulated by isotope-enabled climate models. We applied this method to a new delta O-18 record from an ice core obtained from a dome site in southeast Greenland. The close similarity between the delta O-18 records from the ice core and models enables correlation and the production of a precise age scale, with an accuracy of a few months. A missing delta O-18 minimum in the 1995/1996 winter is an example of an indistinct delta O-18 seasonal cycle. Our analysis suggests that the missing delta O-18 minimum is likely caused by a combination of warm air temperature, weak moisture transport, and cool ocean temperature. Based on the age scale, the average accumulation rate from 1960 to 2014 is reconstructed as 1.02 m yr(-1) in water equivalent. The annual accumulation rate shows an increasing trend with a slope of 3.6 mm yr(-1), which is mainly caused by the increase in the autumn accumulation rate of 2.6 mm yr(-1). This increase is likely linked to the enhanced hydrological cycle caused by the decrease in Arctic sea ice area. Unlike the strong seasonality of precipitation amount in the ERA reanalysis data in the southeast dome region, our reconstructed accumulation rate suggests a weak seasonality.

    DOI: 10.1002/2017JD026716

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

    Web of Science

  24. A global multiproxy database for temperature reconstructions of the Common Era Reviewed

    Julien Emile-Geay, Nicholas P. McKay, Darrell S. Kaufman, Lucien von Gunten, Jianghao Wang, Kevin J. Anchukaitis, Nerilie J. Abram, Jason A. Addison, Mark A.J. Curran, Michael N. Evans, Benjamin J. Henley, Zhixin Hao, Belen Martrat, Helen V. McGregor, Raphael Neukom, Gregory T. Pederson, Barbara Stenni, Kaustubh Thirumalai, Johannes P. Werner, Chenxi Xu, Dmitry V. Divine, Bronwyn C. Dixon, Joelle Gergis, Ignacio A. Mundo, Takeshi Nakatsuka, Steven J. Phipps, Cody C. Routson, Eric J. Steig, Jessica E. Tierney, Jonathan J. Tyler, Kathryn J. Allen, Nancy A.N. Bertler, Jesper Björklund, Brian M. Chase, Min-Te Chen, Ed Cook, Rixt de Jong, Kristine L. DeLong, Daniel A. Dixon, Alexey A. Ekaykin, Vasile Ersek, Helena L. Filipsson, Pierre Francus, Mandy B. Freund, Massimo Frezzotti, Narayan P. Gaire, Konrad Gajewski, Quansheng Ge, Hugues Goosse, Anastasia Gornostaeva, Martin Grosjean, Kazuho Horiuchi, Anne Hormes, Katrine Husum, Elisabeth Isaksson, Selvaraj Kandasamy, Kenji Kawamura, K. Halimeda Kilbourne, Nalan Ko{\c{c}}, Guillaume Leduc, Hans W. Linderholm, Andrew M. Lorrey, Vladimir Mikhalenko, P. Graham Mortyn, Hideaki Motoyama, Andrew D. Moy, Robert Mulvaney, Philipp M. Munz, David J. Nash, Hans Oerter, Thomas Opel, Anais J. Orsi, Dmitriy V. Ovchinnikov, Trevor J. Porter, Heidi A. Roop, Casey Saenger, Masaki Sano, David Sauchyn, Krystyna M. Saunders, Marit-Solveig Seidenkrantz, Mirko Severi, Xuemei Shao, Marie-Alexandrine Sicre, Michael Sigl, Kate Sinclair, Scott St. George, Jeannine-Marie St. Jacques, Meloth Thamban, Udya Kuwar Thapa, Elizabeth R. Thomas, Chris Turney, Ryu Uemura, Andre E. Viau, Diana O. Vladimirova, Eugene R. Wahl, James W.C. White, Zicheng Yu, Jens Zinke

    Scientific Data   Vol. 4   page: 170088   2017.7

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/sdata.2017.88

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

    Web of Science

  25. State dependence of climatic instability over the past 720,000 years from Antarctic ice cores and climate modeling Reviewed

    and Kenji Kawamura, Ayako Abe-Ouchi, Hideaki Motoyama, Yutaka Ageta, Shuji Aoki, Nobuhiko Azuma, Yoshiyuki Fujii, Koji Fujita, Shuji Fujita, Kotaro Fukui, Teruo Furukawa, Atsushi Furusaki, Kumiko Goto-Azuma, Ralf Greve, Motohiro Hirabayashi, Takeo Hondoh, Akira Hori, Shinichiro Horikawa, Kazuho Horiuchi, Makoto Igarashi, Yoshinori Iizuka, Takao Kameda, Hiroshi Kanda, Mika Kohno, Takayuki Kuramoto, Yuki Matsushi, Morihiro Miyahara, Takayuki Miyake, Atsushi Miyamoto, Yasuo Nagashima, Yoshiki Nakayama, Takakiyo Nakazawa, Fumio Nakazawa, Fumihiko Nishio, Ichio Obinata, Rumi Ohgaito, Akira Oka, Jun'ichi Okuno, Junichi Okuyama, Ikumi Oyabu, Fr{\'{e}}d{\'{e}}ric Parrenin, Frank Pattyn, Fuyuki Saito, Takashi Saito, Takeshi Saito, Toshimitsu Sakurai, Kimikazu Sasa, Hakime Seddik, Yasuyuki Shibata, Kunio Shinbori, Keisuke Suzuki, Toshitaka Suzuki, Akiyoshi Takahashi, Kunio Takahashi, Shuhei Takahashi, Morimasa Takata, Yoichi Tanaka, Ryu Uemura, Genta Watanabe, Okitsugu Watanabe, Tetsuhide Yamasaki, Kotaro Yokoyama, Masakazu Yoshimori, Takayasu Yoshimoto

    Science Advances   Vol. 3 ( 2 ) page: e1600446   2017.2

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1126/sciadv.1600446

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

    Web of Science

  26. Climate dependent contrast in surface mass balance in East Antarctica over the past 216 ka Reviewed

    F. PARRENIN, S. FUJITA, A. ABE-OUCHI, K. KAWAMURA, V. MASSON-DELMOTTE, H. MOTOYAMA, F. SAITO, M. SEVERI, B. STENNI, R. UEMURA, E. W. WOLFF

    Journal of Glaciology   Vol. 62 ( 236 ) page: 1037   2016.12

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1017/jog.2016.85

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  27. Physicochemical properties of bottom ice from Dome Fuji, inland East Antarctica Reviewed

    Ohno Hiroshi, Iizuka Yoshinori, Hori Akira, Miyamoto Atsushi, Hirabayashi Motohiro, Miyake Takayuki, Kuramoto Takayuki, Fujita Shuji, Segawa Takahiro, Uemura Ryu, Sakurai Toshimitsu, Suzuki Toshitaka, Motoyama Hideaki

    JOURNAL OF GEOPHYSICAL RESEARCH-EARTH SURFACE   Vol. 121 ( 7 ) page: 1230-1250   2016.7

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/2015JF003777

    Web of Science

  28. Spatial distributions of soluble salts in surface snow of East Antarctica Reviewed

    Yoshinori Iizuka, Hiroshi Ohno, Ryu Uemura, Toshitaka Suzuki, Ikumi Oyabu, Yu Hoshina, Kotaro Fukui, Motohiro Hirabayashi, Hideaki Motoyama

    Tellus B   Vol. 68 ( 0 )   2016.7

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.3402/tellusb.v68.29285

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  29. Sulfur isotopic composition of surface snow along a latitudinal transect in East Antarctica Reviewed

    Ryu Uemura, Kosuke Masaka, Kotaro Fukui, Yoshinori Iizuka, Motohiro Hirabayashi, Hideaki Motoyama

    Geophys. Res. Lett.   Vol. 43 ( 11 ) page: 5878   2016.6

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/2016gl069482

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  30. Acquisition of isotopic composition for surface snow in East Antarctica and the links to climatic parameters Reviewed

    Alexandra Touzeau, Amaëlle Landais, Barbara Stenni, Ryu Uemura, Kotaro Fukui, Shuji Fujita, Sarah Guilbaud, Alexey Ekaykin, Mathieu Casado, Eugeni Barkan, Boaz Luz, Olivier Magand, Gr{\'{e}}gory Teste, Emmanuel Le~Meur, M{\'{e}}lanie Baroni, Joël Savarino, Ilann Bourgeois, Camille Risi

    The Cryosphere   Vol. 10 ( 2 ) page: 837   2016.4

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.5194/tc-10-837-2016

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  31. Precise oxygen and hydrogen isotope determination in nanoliter quantities of speleothem inclusion water by cavity ring-down spectroscopic techniques Reviewed

    Ryu Uemura, Masashi Nakamoto, Ryuji Asami, Satoru Mishima, Masakazu Gibo, Kosuke Masaka, Chen Jin-Ping, Chung Che Wu, Yu Wei Chang, Chuan Chou Shen

    Geochimica et Cosmochimica Acta   Vol. 172   page: 159-176   2016.1

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.gca.2015.09.017

    Scopus

  32. Late Holocene coral reef environment recorded in Tridacnidae shells from archaeological sites in Okinawa-jima, subtropical southwestern Japan Reviewed

    Asami R, Konishi M, Tanaka K, Uemura R, Furukawa M, Shinjo R

    Island Arc   Vol. 24 ( 1 ) page: 61-72   2015

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1111/iar.12076

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  33. Chemical compositions of sulfate and chloride salts over the last termination reconstructed from the Dome Fuji ice core, inland Antarctica Reviewed

    Oyabu I, Iizuka Y, Uemura R, Miyake T, Hirabayashi M, Motoyama H, Sakurai T, Suzuki T, Hondoh T

    Journal of Geophysical Research Atmospheres   Vol. 119 ( 24 ) page: 14045-14058   2014

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/2014JD022030

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  34. 日本-スウェーデン共同南極トラバース2007/2008実施報告(1)企画立案・事前準備と科学研究成果の概要 Reviewed

    藤田秀二, 福井幸太郎, 中澤文男, 榎本浩之, 杉山慎, 藤井理行, 藤田耕史, 古川晶雄, 原圭一郎, 保科優, 五十嵐誠, 飯塚芳徳, 伊村智, 本山秀明, スーディクスィルヴィアン, 植村立

    南極資料   Vol. 58 ( 3 ) page: 352 - 392   2013.3

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    Language:Japanese   Publishing type:Research paper (bulletin of university, research institution)  

    DOI: http://dx.doi.org/doi/10.15094/00010711

  35. Direct linking of Greenland and Antarctic ice cores at the Toba eruption (74 ka BP) Reviewed

    A. Svensson, M. Bigler, T. Blunier, H. B. Clausen, D. Dahl-Jensen, H. Fischer, S. Fujita, K. Goto-Azuma, S. J. Johnsen, K. Kawamura, S. Kipfstuhl, M. Kohno, F. Parrenin, T. Popp, S. O. Rasmussen, J. Schwander, I. Seierstad, M. Severi, J. P. Steffensen, R. Udisti, R. Uemura, P. Vallelonga, B. M. Vinther, A. Wegner, F. Wilhelms, and M. Winstrup

    Climate of the Past   Vol. 9 ( 2 ) page: 749-766   2013

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.5194/cp-9-749-2013

  36. Ranges of moisture-source temperature estimated from Antarctic ice cores stable isotope records over glacial-interglacial cycles Reviewed

    Ryu Uemura, Valérie Masson-Delmotte, Jean Jouzel, Amaelle Landais, Hideaki Motoyama, Barbara Stenni

    Climate of the Past   Vol. 8   page: 1109-1125   2012.6

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    Authorship:Lead author   Language:English   Publishing type:Research paper (scientific journal)  

    DOI: https://doi.org/10.5194/cp-8-1109-2012

  37. Factors controlling isotopic composition of precipitation on Okinawa Island, Japan: Implications for paleoclimate reconstruction in the East Asian Monsoon region Reviewed

    Ryu Uemura, Nao Yonezawa, Kei Yoshimura, Ryuji Asami, Hisashi Kadena, Keita Yamada, Naohiro Yoshida

    Journal of Hydrology   Vol. 475   page: 314–322   2012

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.jhydrol.2012.10.014

  38. Sulphate-climate coupling over the past 300,000 years in inland Antarctica Reviewed

    Yoshinori Iizuka, Ryu Uemura, Hideaki Motoyama, Toshitaka Suzuki, Takayuki Miyake, Motohiro Hirabayashi, and Takeo Hondoh

    Nature   Vol. 490 ( 7418 ) page: 81-84   2012

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/nature11359

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  39. Process-evaluation of tropospheric humidity simulated by general circulation models using water vapor isotopologues: 1. Comparison between models and observations Reviewed

    Camille Risi, David Noone , John Worden , Christian Frankenberg , Gabriele Stiller , Michael Kiefer , Bernd Funke , Kaley A. Walker , Peter Bernath , Matthias Schneider , Debra Wunch , Vanessa Sherlock , Nicholas Deutscher , David Griffith , Paul Wennberg , Sandrine Bony , Jeonghoon Lee , Derek Brown , Ryu Uemura , Christophe Sturm

    Journal of Geophysical Research   Vol. 117 ( 117 ) page: D05303, 26 PP   2012

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1029/2011JD016621

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  40. A comparison of the present and last interglacial periods in six Antarctic ice cores Reviewed

    V. Masson-Delmotte, D. Buiron, A. Ekaykin, M. Frezzotti, H. Gallée, J. Jouzel, G. Krinner, A. Landais, H. Motoyama, H. Oerter, K. Pol, D. Pollard, C. Ritz, E. Schlosser, L. C. Sime, H. Sodemann, B. Stenni, R. Uemura, and F. Vimeux

    Climate of the Past   Vol. 7 ( 7 ) page: 397-423   2011

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.5194/cp-7-397-2011

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  41. Spatial and temporal variability of snow accumulation rate on the East Antarctic ice divide between Dome Fuji and EPICA DML Reviewed

    S. Fujita, P. Holmlund, I. Andersson, I. Brown, H. Enomoto, Y. Fujii1, K. Fujita, K. Fukui, T. Furukawa, M. Hansson, K. Hara, Y. Hoshina, M. Igarashi, Y. Iizuka, S. Imura, S. Ingvander, T. Karlin, H. Motoyama1, F. Nakazawa, H. Oerter, L. E. Sjöberg, S. Sugiyama, S. Surdyk, J. Ström, R. Uemura, and F. Wilhelms

    The Cryosphere,   Vol. 5 ( 5 ) page: 1057-1081   2011

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.5194/tc-5-1057-2011

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  42. Triple isotope composition of oxygen in atmospheric water vapor Reviewed

    Ryu Uemura, Eugeni Barkan, Osamu Abe, Boaz Luz

    Geophysical Research Letters   Vol. 37 ( 37 ) page: L04402   2010

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1029/2009GL041960

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  43. Determining the 17O/16O ratio of water using a water-CO2 equilibration method: application to glacial-interglacial changes in 17O-excess from the Dome Fuji ice core, Antarctica Reviewed

    Ryu Uemura, Osamu Abe, Hideaki Motoyama

    Geochimica et Cosmochimica Acta   Vol. 74 ( 17 ) page: 4919-4936   2010

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.gca.2010.05.007

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  44. 極域氷床深層コアの化学成分分析用試料の汚染除去前処理方法の検討 Reviewed

    三宅隆之, 平林幹啓, 植村立, 東久美子, 本山秀明

    南極資料   Vol. 53 ( 3 ) page: 259 - 282   2009.11

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    Language:Japanese   Publishing type:Research paper (scientific journal)  

  45. A study of the decontamination procedures used for chemical analysis of polar deep ice cores Reviewed

    Miyake T, Hirabayashi M, Uemura R, Goto-Azuma K, Motoyama H.

    Antarctic Record   Vol. 53 ( 3 ) page: 259-282   2009

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    Publishing type:Research paper (scientific journal)  

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  46. Evidence of Deuterium excess in Water Vapor as an Indicator of Ocean Surface Conditions Reviewed

    R. Uemura, Y. Matsui, K. Yoshimura, H. Motoyama, and N. Yoshida

    Journal of Geophysical Research   Vol. 113 ( 113 ) page: D19114   2008

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1029/2008JD010209

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  47. A review of Antarctic surface snow isotopic composition: observations, atmospheric circulation and isotopic modelling Reviewed

    V. Masson-Delmotte, S. Hou, A. Ekaykin, J. Jouzel, A. Aristarain, R. T. Bernardo, D. Bromwich, O. Cattani, M. Delmotte, S. Falourd, M. Frezzotti, H. Gallée, L. Genoni, E. Isaksson, A. Landais, M.M. Helsen, G. Hoffmann, J. Lopez, V. Morgan, H. Motoyama, D. Noone, H. Oerter, J.R. Petit, A. Royer, R. Uemura, G.A. Schmidt, E. Schlosser, J.C. Simões, E. Steig, B. Stenni, M. Stievenard, M.R. van den Broeke, R.S.W. van de Wal, W.J. van de Berg, F. Vimeux, J.W.C. White

    Journal of Climate   Vol. 21 ( 13 ) page: 3359–3387-3387   2008

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1175/2007JCLI2139.1

    Research data storage URL: http://orcid.org/0000-0002-4236-0085

  48. Estimation of net accumulation rate at a Patagonian glacier by ice core analyses using snow algae Reviewed

    Koshima, S., Takeuchi, N., Uetake,J. ,Shiraiwa, T., Uemura, R., Yoshida, N., Matoba, S. and Godoi, M.A.

    Global and Planetary Change   Vol. 59 ( 59 ) page: 236-244   2007.10

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1016/j.gloplacha.2006.11.014

    Web of Science

  49. Northern Hemisphere forcing of climatic cycles in Antarctica over the past 360,000 years Reviewed

    K. Kawamura, F. Parrenin, L. Lisiecki, R. Uemura, F. Vimeux, J. P. Severinghaus, M. A. Hutterli, T. Nakazawa, S. Aoki, J. Jouzel, M. E. Raymo, K. Matsumoto, H. Nakata, H. Motoyama, S. Fujita, K. Goto-Azuma, Y. Fujii and O. Watanabe

    Nature   Vol. 448 ( 7156 ) page: 912-916   2007.8

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1038/nature06015

    Web of Science

  50. Deuterium and oxygen-18 determination of microliter quantities of a water sample using an automated equilibrator Reviewed

    Uemura Ryu, Matsui Yohei, Motoyama Hideaki, Yoshida Naohiro

    RAPID COMMUNICATIONS IN MASS SPECTROMETRY   Vol. 21 ( 11 ) page: 1783-1790   2007

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/rcm.3022

    Web of Science

  51. 水の安定同位体比による古気温推定の研究―極域氷床コアからの数千年スケールの気候変動の復元― Reviewed

    植村 立

    第四紀研究   Vol. 46 ( 2 ) page: 147 - 164   2007

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    Authorship:Lead author   Language:Japanese   Publishing type:Research paper (scientific journal)  

    DOI: 10.4116/jaqua.46.147

  52. 1-D Ice flow modeling at EPICA Dome C and Dome Fuji, East Antarctica Reviewed

    F. Parrenin, G. Dreyfus, G. Durand, S. Fujita, O. Gagliardini, F. Gillet, J. Jouzel, K. Kawamura, N. Lhomme, V. Masson-Delmotte, C. Ritz, J. Schwander, H. Shoji, R. Uemura, O. Watanabe, N. Yoshida

    Climate of the Past   Vol. 3 ( 2 ) page: 243-259   2007

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.5194/cp-3-243-2007

  53. Deuterium and Oxygen-18 Determination of Microliter Quantities of a Water Sample Using an Automated Equilibrator Reviewed

    R. Uemura, Y. Matsui, H. Motoyama, N.Yoshida

    Rapid communications in Mass Spectrometry   ( 21 ) page: 1783-1790   2007

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1002/rcm3022

  54. Isotopic fractionation of water during snow formation: Experimental evidence of kinetic effect Reviewed

    R. Uemura, Y. Matsui, N.Yoshida, O. Abe, S. Mochizuki

    Polar Meteorology and Glaciology   ( 19 ) page: 1-14   2005

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    Language:English   Publishing type:Research paper (scientific journal)  

    Research data storage URL: http://ci.nii.ac.jp/naid/110002261663/en/

  55. Botanical and geographical origin identification of industrial ethanol by stable isotope analyses of C, H, O

    K. Ishida-Fujii, S. Goto, R. Uemura, K. Yamada, M. Sato and N. Yoshida

    Bioscience, Biotechnology and Biochemistry   Vol. 69 ( 11 ) page: 2193-2199   2005

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    Publishing type:Research paper (scientific journal)  

    DOI: 10.1271/bbb.69.2193

  56. An observation-based method for reconstructing ocean surface changes using a 340,000-year deuterium excess record from the Dome Fuji ice core, Antarctica Reviewed

    R. Uemura, N.Yoshida, N. Kurita, M. Nakawo, O. Watanabe

    Geophysical Research Letters   Vol. 31 ( 13 ) page: L13216   2004

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    Language:English   Publishing type:Research paper (scientific journal)  

    DOI: 10.1029/2004GL019954

  57. General tendencies of stable isotopes and major chemical constituents of the Dome Fuji Deep ice core Reviewed

    O. Watanabe, K. Kamiyama, H. Motoyama, Y. Fujii, M. Igarashi, T. Furukawa, K Goto-Azuma, T. Saito, S.Kanamori, N. Kanamori, N. Yoshida, and R. Uemura

    Memoirs of National Institute of Polar Research Special Issue   ( 57 ) page: 1-24   2003

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    Research data storage URL: http://ci.nii.ac.jp/naid/110000009186

  58. High net accumulation rates at Campo de Hielo Patagonico Sur, South America, revealed by analysis of a 45.97 m long ice core Reviewed

    T. Shiraiwa, S. Kohshima, R. Uemura, N. Yoshida, S. Matoba, J. Uetake, M. A. Godoi

    Annals of Glaciology   ( 35 ) page: 84-90   2002

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    Language:English   Publishing type:Research paper (scientific journal)  

    Research data storage URL: http://www.glaciologia.cl/textos/shiraiwa.pdf

▼display all

Books 5

  1. 低温環境の科学事典

    植村 立( Role: Joint author)

    朝倉書店  2016 

  2. 琉球列島の自然講座 サンゴ礁・島の生き物たち・自然環境

    琉球大学理学部, 琉球列島の自然講座, 編集委員会( Role: Contributor ,  3-4 「鍾乳石の内側」)

    ボーダーインク  2015  ( ISBN:9784899822721

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    Language:Japanese

  3. 新版 雪氷辞典

    公益社団法人日本雪氷学会編( Role: Joint author)

    古今書院  2014.3 

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    Language:Japanese Book type:Dictionary, encyclopedia

  4. 極地研ライブラリー「アイスコア 地球環境のタイムカプセル」

    藤井理行 本山秀明編著( Role: Joint author)

    成山堂書店  2011 

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    Language:Japanese Book type:General book, introductory book for general audience

  5. デジタルブック最新第四紀学

    日本第四紀学会50周年電子出版編集委員会編( Role: Joint author)

    日本第四紀学会  2009 

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    Language:Japanese Book type:Dictionary, encyclopedia

MISC 3

  1. ドームふじアイスコアによる古気候研究の成果 -エアロゾルと気温復元-

    植村 立

    科研費 新学術領域研究「熱ー水ー物質の巨大リザーバ:全球環境変動を駆動する南大洋・南極氷床」 研究成果報告書     page: 124 - 131   2023.3

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    Authorship:Lead author, Corresponding author   Language:Japanese   Publishing type:Article, review, commentary, editorial, etc. (other)  

  2. 南極アイスコアの安定同位体比解析による周辺海域の温度復元 Invited

    植村 立

    Isotope News   Vol. 762   page: 18-21   2019.4

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    Authorship:Lead author   Language:Japanese  

  3. 鍾乳石から気候変動を読み解く

    植村 立

    化学と教育   Vol. 64 ( 8 ) page: 388 - 389   2016

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    Authorship:Lead author   Language:Japanese  

    DOI: 10.20665/kakyoshi.64.8_388

Presentations 79

  1. 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 Invited International coauthorship

    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

    日本地球化学会年会  2024.9.18 

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    Event date: 2024.9

    Language:Japanese   Presentation type:Oral presentation (keynote)  

    Venue:金沢   Country:Japan  

  2. 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 International coauthorship

    有村 悠汰、植村 立、Syed Azharuddin、阿部 理、浅海 竜司、Yuan Shufeng、Chin Hahjung、Wang Xianfeng

    日本地球化学会年会  2024.9.18 

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    Event date: 2024.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:金沢  

  3. グリーンランドアイスコアに記録された過去 200 年間の過酸化水素濃度の長期変動要因の検討

    坪井彩紀 、石野咲子、川上薫、服部祥平、藤田耕史、 浜本佐彩、植村立、的場澄人、飯塚芳徳

    日本地球化学会年会  2024.9.18 

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    Event date: 2024.9

    Language:Japanese   Presentation type:Poster presentation  

  4. 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 Japan International conference

    Kanji Tatsumi, Akira Ijiri, Ryu Uemura, Makoto Otsubo, Minoru Ikehara, Asuka Yamaguchi

    International Joint Workshop on Slow-to-Fast Earthquakes 2024  2024.9.17 

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    Event date: 2024.9

    Language:English   Presentation type:Poster presentation  

    Venue:Oita, Japan   Country:Japan  

  5. Development of cavity ringdown spectrometer using optical feedbacked quantum cascade laser for clumped CO 2 measurement International conference

    Kota Tsuge, Erika Takayama, Momo Mukai, Osamu Abe, Ryu Uemura, and Hideki Tomita

    Field Laser Applications in Industry and Research   2024.9.16 

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    Event date: 2024.9

    Language:English   Presentation type:Poster presentation  

    Venue:Assisi, Italy   Country:Italy  

  6. グリーンランド氷床南東部アイスコアに含まれる硫酸エアロゾルの粒径分級装置の開発

    川上薫,飯塚芳徳,植村立

    雪氷研究大会  2024.9.16 

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    Event date: 2024.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:長岡  

  7. ネパール・ヒマラヤ, トランバウ氷河アイスコアに保存された145年間の大気ダスト記録

    江刺和音, 對馬あかね, 的場澄人, 飯塚芳徳, 植村立, 足立光司, 木名瀬健, Rijan B. Kayastha, 藤田耕史

    雪氷研究大会  2024.9.16 

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    Event date: 2024.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:長岡  

  8. 産業革命後の北極の大気酸性度と硝酸エアロゾル濃度の関係 International coauthorship

    飯塚芳徳,松本真依, 川上薫, 捧茉優, 石野咲子, 服部祥平, 植村立, 松井仁志, 藤田耕史, 大島長, Andrea Spolaor, Anders Svensson, Bo Møllesøe Vinther, 大野浩, 関宰, 的場澄人

    雪氷研究大会  2024.9.16 

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    Event date: 2024.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:長岡  

  9. 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 International coauthorship

    有村 悠汰、植村 立、Syed Azharuddin、阿部 理、浅海 竜司、Yuan Shufeng、Chin Hahjung、Wang Xianfeng

    日本第四紀学会2024年大会  2024.8.29 

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    Event date: 2024.8

    Language:Japanese   Presentation type:Poster presentation  

    Venue:仙台  

  10. 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 International coauthorship

    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

    日本第四紀学会2024年大会  2024.8.29 

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    Event date: 2024.8

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:仙台  

  11. 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

    辰巳 寛二、井尻 暁、植村 立、大坪 誠、池原 実、山口 飛鳥

    日本地球惑星科学連合 連合大会2024年大会  2024.5.26 

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    Event date: 2024.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:千葉  

  12. A 146 year record of atmospheric dust from Trambau Glacier ice core, Nepal Himalaya International coauthorship

    江刺 和音、對馬 あかね、植村 立、的場 澄人、飯塚 芳徳、足立 光司、木名瀬 健、Kayastha Rijan B.、藤田 耕史

    Japan Geoscience Union Meeting 2024  2024.5.26 

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    Event date: 2024.5

    Language:Japanese   Presentation type:Oral presentation (general)  

  13. Indian summer monsoon evolution during the last glacial termination Invited International coauthorship International conference

    Sakonvan Chawchai、Xiaojing Du、Hao-Cheng Wang、Hsun-Ming Hu、Liangcheng Tan、Xiuyang Jiang、Ryuji Asami、Ryu Uemura、Ludvig Löwemark、Barbara Wohlfarth、Yuji Sano、Yusuke Yokoyama、Gideon M Henderson、Chuan-Chou Shen

    Japan Geoscience Union Meeting 2024  2024.5.26 

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    Event date: 2024.5

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Chibam Japan   Country:Japan  

  14. グリーンランドSE-Dome II アイスコアの季節分解能の年代スケールと酸素同位体記録の年内変動パターン

    浜本 佐彩、川上 薫、捧 茉優、松本 真依、Hayoung Bong、芳村 圭、岡崎 淳史、的場 澄人、飯塚 芳徳、植村 立

    日本地球惑星科学連合 連合大会2024年大会  2024.5.26 

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    Event date: 2024.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:千葉、日本  

  15. 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 International coauthorship

    有村 悠汰、植村 立、Syed Azharuddin、阿部 理、浅海 竜司、Yuan Shufeng、Chin Hahjung、Wang Xianfeng

    日本地球惑星科学連合 連合大会2024年大会  2024.5.26 

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    Event date: 2024.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:千葉、日本  

  16. Surface temperature at Dome Fuji during the last interglacial period Invited International coauthorship International conference

    大藪 幾美、川村 賢二、Buizert Christo、Parrenin Frédéric、植村 立、平林 幹啓、尾形 純、北村 享太郎、福田 かおり、藤田 秀二、猿谷 友孝、東 久美子

    Japan Geoscience Union Meeting 2024  2024.5.26 

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    Event date: 2024.5

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Chiba   Country:Japan  

  17. グリーンランドSE2アイスコアの過去20年間の17O-excessの変動メカニズム

    星屋 怜音、植村 立、浜本 佐彩、的場 澄人、飯塚 芳徳

    日本地球惑星科学連合 連合大会2024年大会  2024.5.26 

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    Event date: 2024.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:千葉  

  18. グリーンランド南東ドームアイスコアに含まれる硫酸エアロゾルの粒径分級装置の開発

    川上 薫、飯塚 芳徳、植村 立

    日本地球惑星科学連合 連合大会2024年大会  2024.5.26 

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    Event date: 2024.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:千葉  

  19. Seasonally Resolved Age Scale based on Oxygen Isotope Record from SE-Dome II Ice Core, Greenland   International conference

    Saaya Hamamoto, Sumito Matoba, Kaoru Kawakami, Mahiro Sasage, Mai Matsumoto, Kei Yoshimura, Atsushi Okazaki, Hayoung Bong, Yoshinori Iizuka, and Ryu Uemura 

    Europian Geophysical Union, Genearl Assembly  2024.4.14 

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    Event date: 2024.4

    Language:English   Presentation type:Poster presentation  

    Venue:Vienna   Country:Austria  

  20. Atmospheric dust record preserved in an ice core from Trambau Glacier, Nepal Himalaya International conference

    Nao Esashi, Akane Tsushima, Ryu Uemura, Sumito Matoba, Yoshinori Iizuka, Kouji Adachi, Takeshi Kinase, Rijan B. Kayastha, and Koji Fujita 

    Europian Geophysical Union, Genearl Assembly  2024.4.14 

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    Event date: 2024.4

    Language:English   Presentation type:Poster presentation  

    Venue:Vienna   Country:Austria  

  21. 多重置換同位体分子計測のための中赤外キャビティリングダウン分光システムの開発

    柘植紘汰、富田英生、齊藤圭亮、鈴木勇太、高山恵理佳、阿部理 、植村立

    第21回同位体科学研究会  2024.3.8 

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    Event date: 2024.3

    Language:Japanese   Presentation type:Poster presentation  

    Venue:東京(芝浦工大)  

  22. Surface temperature at Dome Fuji during the last interglacial period Invited International coauthorship International conference

    Ikumi Oyabu, Kenji Kawamura, Christo Buizert, Frédéric Parrenin and Ryu Uemura

    AGU fall meeting  2023.12.11 

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    Event date: 2023.12

    Language:English   Presentation type:Oral presentation (invited, special)  

    Venue:Sanfranciso, USA   Country:United States  

  23. 沖縄の完新世中期における火山活動による気候変動の数十年周期応答を示す鍾乳石の証拠 International coauthorship

    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

    地球環境史学会年会  2023.12.3 

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    Event date: 2023.12

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:金沢大学  

  24. 石筍コア試料の同位体分析による沖縄県南大東島における過去9万年間の気候変動 International coauthorship

    有村 悠汰, 植村 立, Syed Azharuddin, 阿部 理, 浅海 竜司, Yuan Shufeng, Chin Hahjung, Wang Xianfeng

    地球環境史学会年会  2023.12.3 

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    Event date: 2023.12

    Language:Japanese   Presentation type:Poster presentation  

    Venue:金沢大学  

  25. A quasi-monthly 10Be record of the early 21st century obtained from the Greenland SE-Dome II ice core International conference

    Riko Yagihashi, Kazuho Horiuchi, Kohsei Yoshioka, Yoshinori Iizuka, Sumito Matoba, Kaoru Kawakami, Sakiko Ishino, Mahiro Sasage, Mai Matsumoto, Saaya Hamamoto, Ryu Uemura, Takeyasu Yamagata, Hiroyuki Matsuzaki

    2023.11.24 

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    Event date: 2023.11

    Language:English   Presentation type:Oral presentation (general)  

    Country:Korea, Republic of  

  26. Surface temperature at Dome Fuji during the last interglacial period International coauthorship International conference

    Ikumi Oyabu, Kenji Kawamura, Christo Buizert, Frédéric Parrenin, Ryu Uemura, Motohiro Hirabayashi, Jun Ogata, Kyotaro Kitamura, Kaori Fukuda, Shuji Fujita, , Tomotaka Saruya, Kumiko Goto-Azuma,

    The 14th Symposium on Polar Science  2023.11.13 

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    Event date: 2023.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:National Institute of Polar Research   Country:Japan  

  27. キャビティリングダウン分光に基づくトリチウム水分析のための試料導入法の開発

    富田 英生 、岩元 一輝 、向井 もも 、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 、天野 みなみ

    応用物理学会秋季学術講演会  2023.9.19 

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:熊本  

  28. ネパール・ヒマラヤ, トランバウ氷河アイスコアの不溶性微粒子の解析

    江刺和音,對馬あかね,植村立,的場澄人,飯塚芳徳,藤田耕史

    雪氷研究大会  2023.9.4 

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  29. グリーンランド南東ドームアイスコアのイオン濃度分析による、産業革命(1799年)から現在(2020年)までの古環境復元

    飯塚芳徳,的場澄人,川上薫,松本真依,捧美優,植村立,大島長,石野咲子

    雪氷研究大会  2023.9.3 

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福島  

  30. グリーンランド SE-Dome II アイスコアの酸素同位体分析による高精度年代の作成

    浜本 佐彩 ,植村 立,的場 澄人 ,川上 薫,捧 茉優,松本 真依,芳村 圭,岡崎 淳史,飯塚 芳徳

    雪氷研究大会  2023.9.3 

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福島  

  31. グリーンランド南東ドームアイスコアに含まれる硫酸エアロゾルの粒径分級装置の開発

    川上薫,飯塚芳徳,植村立

    雪氷研究大会  2023.9.3 

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    Event date: 2023.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  32. 高精度微量同位体分子分析のためのキャビティリングダウン分光システムの開発

    柘植紘汰、向井もも、齊藤圭亮、鈴木勇太、高山恵理佳、西澤典彦、天野みなみ、阿部恒、植村立 、阿部理 、富田英生

    次世代放射線シンポジウム2023  2023.8.17 

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    Event date: 2023.8

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:福島  

  33. グリーンランド南東部SE-Dome II アイスコアを用いた過去220年間の涵養量と融解履歴の復元 Invited

    川上 薫、飯塚 芳徳、捧 茉優,、松本 真依,、斎藤 健、堀 彰、石野 咲子、藤田 秀二、藤田 耕史、高杉 啓太、畠山 匠、浜本 佐彩、渡利 晃久、江刺 和音、大塚 美侑、植村 立、堀内 一穂、箕輪 昌紘、服部 祥平、青木 輝夫、平林 幹啓、川村 賢二、的場 澄人

    日本地球惑星科学連合 連合大会2023年大会  2023.5 

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    Event date: 2023.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:千葉  

  34. Multidecadal reconstruction of mid-Holocene climate of Western Pacific based on the stalagmite fluid inclusion isotopes Invited International coauthorship International conference

    Syed Azharuddin、Kanako Omine、Kosuke Masaka、Ryuji Asami、Mahjoor Ahmad Lone、Yu-Chen Chou、Chuan-Chou Shen、Ryu Uemura

    2023.5 

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    Event date: 2023.5

    Language:English   Presentation type:Oral presentation (invited, special)  

  35. グリーンランドSE-Dome II アイスコアの酸素同位体分析による高精度年代の作成

    浜本 佐彩、植村 立、的場 澄人、川上 薫、捧 茉優、松本 真依、芳村 圭、岡崎 淳史、飯塚 芳徳

    日本地球惑星科学連合 連合大会2023年大会  2023.5 

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    Event date: 2023.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:千葉  

  36. 過去9万年間の気候記録を保存した南大東島石筍コアの初期解析 International coauthorship

    有村 悠汰、植村 立、阿部 理、浅海 竜司、Yuan Shufang、Chin Hahjung、Wang Xianfeng

    日本地球惑星科学連合 連合大会2023年大会  2023.5 

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    Event date: 2023.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:千葉  

  37. 長期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

    植村 立、有村 悠汰、阿部 理、浅海 竜司

    日本地球惑星科学連合 連合大会2023年大会  2023.5 

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    Event date: 2023.5

    Language:Japanese   Presentation type:Poster presentation  

    Venue:千葉  

  38. 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

    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

    第20回 同位体科学研究会  2023.3.10 

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    Event date: 2023.3

    Language:Japanese   Presentation type:Oral presentation (general)  

  39. Accumulation rate at a semiannual accuracy and melting history of an ice core from southeastern Greenland (SE-Dome Ⅱ) dating back to preindustrial International conference

    Kaoru Kawakami, Yoshinori Iizuka, Mahiro Sasage, Mai Matsumoto, Takeshi Saito, Akira Hori, Sakiko Ishino, Shuji Fujita, Koji Fujita, Keita Takasugi, Takumi Hatakeyama, Saaya Hamamoto, Akihisa Watari, Nao Esashi, Miu Otsuka, Ryu Uemura, Kazuho Horiuchi, Masahiro Minowa, Shohei Hattori, Teruo Aoki, Motohiro Hirabayashi, Kenji Kawamura, Sumito Matoba

    Seventh International Symposium on Arctic Research  2023.3.6 

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    Event date: 2023.3

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Tokyo/ Hybrid  

  40. Development of Cavity Ring-down Spectrometer for Tritiated/Heavy Water Samples International conference

    Kazuki Iwamoto, Keisuke Saito, Yuta Suzuki, Ryu Uemura, Osamu Abe, Hisashi Abe, Norihiko Nishizawa, Hideki Tomita

    Laser congress and exhibition  2022.12.11 

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    Event date: 2022.12

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Barcelona, Spain   Country:Spain  

  41. 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

    植村立、有村悠汰、阿部理、浅海竜司

    地球環境史学会年会  2022.11.4  地球環境史学会

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    Event date: 2022.11

    Language:Japanese   Presentation type:Poster presentation  

    Venue:オンライン/対面(東京大学)  

  42. Dating of the ice core from south-east dome, Greenland International conference

    Mahiro Sasage, Yoshinori Iizuka, Sakiko Ishino, Shuji Fujita, Kaoru Kawakami, Akira Hori, Takeshi Saito, Mai Matsumoto, Keita Takasugi, Sumito Matoba, Shohei Hattori, Ryu Uemura, Kazuho Horiuchi

    International Partnerships in Ice Core Sciences (IPICS)   2022.10.2 

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    Event date: 2022.10

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Crans-Montana, Switzerland   Country:Switzerland  

  43. 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

    岩元 一輝,齊藤 圭亮,鈴木 勇太,植村 立, 阿部 理, 富田 英生

    応用物理学会秋季学術講演会  2022.9.20 

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東北大学  

  44. 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

    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

    応用物理学会秋季学術講演会  2022.9.20 

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    Event date: 2022.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:東北大学  

  45. 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

    植村立、有村悠汰、阿部理、浅海竜司

    日本地球化学会年会  2022.9.7  日本地球化学会

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    Event date: 2022.9

    Language:Japanese   Presentation type:Poster presentation  

    Venue:ハイブリッド開催(高知大学&オンライン)  

  46. A geoarchaeological approach for reconstructing last glacial temperatures using coupled isotopic analyses of fossil snails and stalagmites from limestone caves in Okinawa, Japan International coauthorship International conference

    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

    EGU General Assembly 2022  2022.5.23 

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    Event date: 2022.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online/ Viennna  

  47. 最終氷期における南極ドームふじ氷床コアの硫酸塩エアロゾルの硫黄同位体を用いた起源推定:アタカマ砂漠からの寄与の可能性

    植村 立、眞坂 昂佑、飯塚 芳徳、平林 幹啓、松井 仁志、松本 理誠、植村 美希、藤田 耕史、本山 秀明

    日本地球惑星科学連合 連合大会2022年大会  2022.5.25 

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    Event date: 2022.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張、千葉   Country:Japan  

  48. グリーンランド南東ドームアイスコアの初期解析報告 Invited

    飯塚芳徳、川上薫、捧美優、松本真衣、斎藤健、堀彰、高杉啓太、畠山匠、渡利晃久、江刺和音、大塚美侑、宮本淳、植村立、石野咲子、藤田秀二、青木輝夫、藤田耕史、服部祥平、堀内一穂、平林幹啓、川村賢二、的場澄人

    日本地球惑星科学連合 連合大会2022年大会  2022.5.22 

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    Event date: 2022.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Venue:幕張、千葉  

  49. ネパールヒマラヤ,トランバウ氷河で掘削されたアイスコアの不溶性不純物の顕微鏡観察

    小西 ふき、竹内 望、對馬 あかね、江刺 和音、植村 立、的場 澄人、飯塚 芳徳、藤田 耕史

    日本地球惑星科学連合 連合大会2022年大会  2022.5.22 

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    Event date: 2022.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張、千葉   Country:Japan  

  50. ネパール・ヒマラヤ, トランバウ氷河アイスコアの水安定同位体・不溶性微粒子分析

    江刺 和音、對馬 あかね、植村 立、的場 澄人、飯塚 芳徳、藤田 耕史

    日本地球惑星科学連合 連合大会2022年大会  2022.5.22 

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    Event date: 2022.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Venue:幕張、千葉   Country:Japan  

  51. A geoarchaeological approach for estimating last glacial temperatures using coupled isotopic analyses of fossil snails and stalagmites from limestone caves in Okinawa, Japan International coauthorship

    Ryuji Asami, Rikuto Hondoh, Ryu Uemura, Ryuichi Shinjo, Chuan-Chou Shen, Akihiro Kano, Masaki Fujita, Shinji Yamasaki, Hideko Takayanagi, Yasufumi Iryu

    2022.5.22 

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    Event date: 2022.5

    Language:English   Presentation type:Poster presentation  

  52. Sulfur isotope ratio of sulfate aerosols in an Antarctic Dome Fuji ice core during the last glacial period: a potential contribution from the Atacama Desert International conference

    Ryu Uemura, Kosuke Masaka, Yoshinori Iizuka, Motohiro Hirabayashi, Hitoshi Matsui, Risei Matsumoto, Miki Uemura, Koji Fujita, Hideaki Motoyama

    PAGES Open Science Meeting 2022  2022.5.16 

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    Event date: 2022.5

    Language:English   Presentation type:Oral presentation (general)  

    Venue:Online  

  53. A temperature estimate for abrupt warming during the last deglaciation using isotopic analysis of fluid inclusions from a stalagmite in Okinawa, Japan International conference

    Ryu Uemura, Satoru Mishima, Koki Nakamura, Ryuji Asami, Hirokazu Kato, Akihiro Kano, Jin-Ping. Chen, Chuan-Chou Shen

    AGU fall meeting 

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    Event date: 2021.12

    Language:English   Presentation type:Poster presentation  

  54. Initial Analysis of Volatile Components in the Hayabusa2 Samples International coauthorship International conference

    Ryuji Okazaki, Bernard Marty, Henner Busemann, Yayoi N. Miura, Keita Yamada, Saburo Sakai, Ko Hashizume, Ken-ichi Bajo, Shun Sekimoto, Fumio Kitajima, Kevin Righter, Alex Meshik, Jamie Gimour, Naoyoshi Iwata, Evelyn Füri, Sarah Crowther, Naoki Shirai, Mitsuru Ebihara, Yashinori Takano, Akizumi Ishida, Reika Yokochi, Olga Pravdivseva, Jisun Park, Toru Yada, Kunihiko Nishiizumi, Keisuke Nagao, Jong Ik Lee, Michel Broadley, My Riebe, Patricia Clay, Akihiro Kano, Mark Caffee, Shinsuke Kawaguchi, Yohei Matsui, Ryu Uemura, Makoto Inagaki, Daniela Krietsch, Colin Maden, Mizuki Yamamoto, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Hiroshi Naraoka, Hikaru Yabuta, Kanako Sakamoto, Shogo Tachibana, Sei-ichiro Watanabe and Yuichi Tsuda

    HAYABUSA 2021: 8th Symposium of Solar System Materials  2021.11.16 

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    Event date: 2021.11

    Language:English   Presentation type:Oral presentation (general)  

    Venue:online  

  55. 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 International coauthorship

    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

    地球環境史学会  2021.10 

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    Event date: 2021.10

    Language:Japanese   Presentation type:Poster presentation  

  56. ネパール・ヒマラヤ, トランバウ氷河アイスコアの水安定同位体分析

    江刺和音,對馬あかね,植村立, 飯塚芳徳, 的場澄人, 藤田耕史

    雪氷研究大会  2021.9 

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  57. Acidity-driven enhancement of sulfate formation after SO2 emission control evidenced by 17O-excess of ice core sulfate. International coauthorship International conference

    Shohei Hattori, Yoshinori Iizuka, Becky Alexander, Sakiko Ishino, Koji Fujita, Shuting Zhai, Tomás Sherwen, Naga Oshima, Ryu Uemura, Akinori Yamada, Nozomi Suzuki, Sumito Matoba, Asuka Tsuruta, Joel Savarino, Naohiro Yoshida

    IGAC 16th Scientific Conference  2021.9 

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    Event date: 2021.9

    Language:English   Presentation type:Oral presentation (general)  

  58. 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 International coauthorship

    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

    日本地球化学会年会  2021.9.1 

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  59. 硫酸の三酸素同位体組成を用いたSO2排出抑制期におけるケミカルフィードバック機構の解明 International coauthorship

    服部祥平、飯塚芳徳、Becky Alexander、石野咲子、藤田耕史、Shuting Zhai、Tomás Sherwen、大島長、植村立、山田明憲、鈴木希実、的場澄人、鶴田明日香、Joel Savarino、吉田尚弘

    日本地球化学会年会  2021.9 

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    Event date: 2021.9

    Language:Japanese   Presentation type:Oral presentation (general)  

  60. Ice core drilling on a high-elevation accumulation zone of Trambau Glacier in the Nepal Himalaya

    2021.5.30 

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    Event date: 2021.5 - 2021.6

    Language:Japanese   Presentation type:Oral presentation (general)  

  61. 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

    植村 立

    日本地球惑星科学連合 連合大会2021年大会  2021.5.30 

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    Event date: 2021.5 - 2021.6

    Language:Japanese   Presentation type:Poster presentation  

  62. A stalagmite-inferred hydroclimate record over the past 1200 years in a western Pacific island International conference

    Ryu UEMURA, Ryuji ASAM, Mahjoor Ahmad LONE, Yu-Chen CHOU, Chuan-Chou SHEN

    American Geophysical Union Fall meeting 

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    Event date: 2020.12

    Language:English   Presentation type:Poster presentation  

    Venue:online   Country:United States  

  63. Oxygen isotope record during GI-21 from a stalagmite in Minami-daito island, Okinawa

    Uemura Ryu, Asami Ryuji, Abe Osamu, YUAN Shufang, WANG Xianfeng

    Abstracts of Annual Meeting of the Geochemical Society of Japan 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

    <p></p>

    DOI: 10.14862/geochemproc.67.0_72

  64. プロキシとしての水の酸素水素同位体比の基礎と展望 Invited

    植村 立

    日本地球化学会 年会 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  65. ArCS II Cryosphere research–3 "Water and material circulations between snow-and-ice and atmosphere in seasonal sea ice regions and their impact on environment in the Arctic

    Sumito Matoba, Yoshinori Iizuka, Yuzo Miyazaki, Toshitaka Suzuki, Shohei Hattori, Ryu Uemura, Keiichiro Hara, Naga Ohshima, Tetsuhide Yamasaki and Teruo Aoki

    The 11th Symposium on Polar Science 

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    Event date: 2020.11 - 2020.12

    Language:English   Presentation type:Poster presentation  

    Venue:online   Country:Japan  

  66. ArCS II Cryosphere Research 3 "Water and material circulations in seasonal sea ice regions and their impacts on environment in the Arctic"

    Matoba Sumito, Aoki Teruo, Iizuka Yoshinori, Miyazaki Yuzo, Suzuki Toshitaka, Hattori Shohei, Uemura Ryu, Hara Keiichiro, Oshima Naga, Yamasaki Tetsuhide

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

    DOI: 10.14851/jcsir.2020.0_111

  67. Sulfate aerosol composition and flux during 1970's derived from the SE-Dome ice core, Greenland

    Iizuka Yoshinori, Uemura Ryu, Matsui Hitoshi, Oshima Naga, Matoba Sumito

    Summaries of JSSI and JSSE Joint Conference on Snow and Ice Research 

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    Event date: 2020.11

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

    DOI: 10.14851/jcsir.2020.0_67

  68. A combination of fossil shell- and stalagmite-based paleoclimate reconstructions from an archaeological site of Okinawa Island, Japan International conference

    Ryuji Asami, Rikuto Hondoh, Ryu Uemura, Ryuichi Shinjo, Chuan-Chou Shen, Akihiro Kano, Masaki Fujita, Shinji Yamasaki, Hideko Takayanagi, Yasufumi Iryu

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    Event date: 2020.6

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  69. Speleothem as Archive of Past Volcanism: Impact of Kikai Volcano Eruption (7.3 ka) on a Remote Oceanic Island International conference

    Tanaka K, Miki T, Takahata N, Uemura R, Asami R, Yu T-L, Shen C-C, Shirai K, Murakami-Sugihara N, Toyama K, Sano Y

    Goldschmidt Conference 2020 

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    Event date: 2020.6

    Language:English   Presentation type:Poster presentation  

    Country:Japan  

  70. The 60 years history of atmospheric sulfate formation pathways based on triple oxygen isotopic composition preserved in the SE-Dome ice core International conference

    Shohei Hattori, Yoshinori Iizuka, Koji Fujita, Ryu Uemura, Sakiko Ishino, Naga Oshima, Sumito Matoba, Nozomi Suzuki, Asuka Tsuruta, Joel P Savarino and Naohiro Yoshida

    American Geophysical Union Fall meeting 

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    Event date: 2019.12

    Language:English   Presentation type:Oral presentation (general)  

    Country:United States  

  71. 沖縄県南大東島の石筍の高解像度微量元素分析によるイベント記録解析

    三木 翼, 高畑 直人, 杉原 奈央子, 白井 厚太朗, 植村 立, Chuan-Chou Shen, 佐野 有司

    日本地球化学会年会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  72. 沖縄県南大東島の過去1400年間の石筍の同位体比変動

    植村 立, 浅海 竜司, Mahjoor Ahmad LONE, Yu―Chen CHOU, Chuan―Chou SHEN

    日本地球化学会年会 

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    Event date: 2019.9

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  73. A stalagmite-inferred hydroclimate record over the past 1400 years in Okinawa, Japan International conference

    Ryu UEMURA, Ryuji ASAMI, Mahjoor Ahmad LONE, Yu-Chen CHOU, Chuan-Chou SHEN

    16 th Asia Oceania Geosciences Society (AOGS) annual meeting  

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    Event date: 2019.7 - 2019.8

    Language:English   Presentation type:Poster presentation  

    Country:Singapore  

  74. Stalagmite-inferred hydroclimate dynamics in East Timor over the last deglaciation International conference

    Chuan-Chou SHEN, Chia-Hao Hsu, Jin-Ping Hsu, Horng-Sheng Mii, Akihiro Kano, Uemura Ryu, Yue-Gau Chen, Li Lo, Tsai-Luen Yu

    20th Congress of the International Union for Quaternary Research (INQUA) 

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    Event date: 2019.7

    Language:English   Presentation type:Oral presentation (general)  

    Country:Ireland  

  75. SE-Domeアイスコアの硫酸三酸素同位体組成から復元される過去60年における大気硫酸生成反応の変遷

    服部 祥平、飯塚 芳徳、藤田 耕史、植村 立、石野 咲子、大島 長、鈴木 希実、的場 澄人、鶴田 明日香、Savarino Joel、吉田 尚弘

    日本地球惑星科学連合 連合大会2019年大会 

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    Event date: 2019.5

    Language:English   Presentation type:Oral presentation (general)  

    Country:Japan  

  76. 沖縄の降水の17O-excess値を用いた水蒸気起源における相対湿度の定量的な復元

    上地 佑衣菜、植村 立

    日本地球惑星科学連合 連合大会2019年大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Oral presentation (general)  

    Country:Japan  

  77. 硬骨海綿の骨格化学組成の古海洋プロキシとしての有用性

    浅海 竜司、成瀬 貫、水山 克、植村 立、新城 竜一、伊勢 優史、藤田 喜久、坂巻 隆史

    日本地球惑星科学連合 連合大会2019年大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

  78. アイスコアによる過去の大気エアロゾルの復元とその変動要因 Invited

    飯塚 芳徳、植村 立、藤田 耕史、服部 祥平、関 宰、大島 長、大野 浩、的場 澄人

    日本地球惑星科学連合 連合大会2019年大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Oral presentation (invited, special)  

    Country:Japan  

  79. 沖縄島洞穴遺跡産の淡水棲貝化石および鍾乳石による更新世後期の古気温復元

    浅海 竜司、本堂 陸斗、植村 立、新城 竜一、狩野 彰宏、藤田 祐樹、山崎 真治、高柳 栄子、井龍 康文

    日本地球惑星科学連合 連合大会2019年大会 

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    Event date: 2019.5

    Language:Japanese   Presentation type:Poster presentation  

    Country:Japan  

▼display all

Research Project for Joint Research, Competitive Funding, etc. 2

  1. クレタ島の気候変動の「窓」としての鍾乳石中の流体包有物

    2024.4 - 2024.5

    外国人招へい研究者(短期)  外国人招へい研究者(短期)

    Vasile Ersek

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    Authorship:Other  Grant type:Competitive

  2. 北極アイスコアの水の三酸素同位体比分析による過去30年間の気候変動の復元

    2022.9 - 2023.9

    クリタ水・環境科学財団  研究助成(水を究める) 

    植村 立

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    Grant type:Other

KAKENHI (Grants-in-Aid for Scientific Research) 18

  1. 不確実性0.5℃以内の古水温復元への挑戦:無機セメントと単体サンゴの直接分析から

    Grant number:24K21560  2024.6 - 2027.3

    科学研究費助成事業  挑戦的研究(萌芽)

    浅海 竜司, 植村 立

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    昔の海の温度(古水温)を知ることは、この半世紀以上にわたる地球科学の主要テーマの一つである。しかし、炭酸カルシウム生物の酸素同位体による従来法から復元される値には、常に大きな不確実性(最大で数℃)が含まれており、真の地球環境システムの理解と将来の気候予測に大きな障壁となっている。そこで本研究では、これまで着目されなかった地質試料を対象として、二つの新たな科学的アプローチから、不確実性要素に影響されない高確度の古水温復元法を探索・確立することを目的とする。そして、不確かさ0.5℃以内という世界に類のないレベルでの古水温復元に挑戦する。

  2. アイスコア解析による南極・グローバル相互作用の解明

    Grant number:24H02345  2024.4 - 2029.3

    科学研究費助成事業  学術変革領域研究(A)

    川村 賢二, 堀内 一穂, 植村 立, 平林 幹啓, 大藪 幾美, 中澤 文男

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    南極ドームふじアイスコアを分析し、過去数十万年間の気候・氷床変動の強制力や応答(南極・南大洋の温度や積雪、氷床高度、エアロゾル関連物質、温室効果ガスなど)を復元する。中低緯度や北半球を含む世界の古環境データとの年代対比を通じ、南極とグローバル気候システムとの相互作用の理解に迫る。また、南極沿岸アイスコアによる近年の積雪・エアロゾル・微生物の解析から、直接観測とリンクする復元も行う。領域内の観測研究や過去の地質学的研究、モデリング研究と連携して新学理「グローバル南極学」の創成に貢献する。

  3. アイスコアの水の全同位体比分析による北大西洋温暖化ホールの検出

    Grant number:23K18518  2023.6 - 2026.3

    科学研究費助成事業  挑戦的研究(萌芽)

    植村 立

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\6370000 ( Direct Cost: \4900000 、 Indirect Cost:\1470000 )

    地球温暖化に関連して、北大西洋高緯度域における深層水の沈み込みが減少し、大西洋の海洋大循環が弱まっていることが指摘されている。この変動は、北大西洋の一部で水温の上昇が起こっていない海域として検出され始めている。しかし、深層水変動の直接観測は過去20年程度しかなく、気候シミュレーションや長期間の古気候データを復元した研究では異なった見解が示され、空間的に広範囲の古気候データの必要性が指摘されている。このような背景を踏まえ、本研究では、グリーンランドで掘削されたアイスコアの酸素・水素同位体比を超高精度で分析することで周辺海域の過去約200年間分の海面水温データを得ることを目指す。

  4. Reconstruction of particle size distribution of sulfate aerosols from pre-industrial to present using an ice core

    Grant number:23H00511  2023.4 - 2027.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  5. レーザー分光を用いた多重置換同位体分子計測法の開発

    Grant number:22H03869  2022.4 - 2025.3

    科学研究費助成事業  基盤研究(B)

    富田 英生, 植村 立, 阿部 理

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    本研究では、光吸収強度の高い中赤外領域と光共振器で感度を飛躍的に向上させたレーザー光吸収分光法を用いて、存在比の極めて低い多重置換同位体分子の光吸収量を測定して同位体分子の存在比を直接分析する手法を開発する。二酸化炭素を第一の目標として、存在比がppmレベルの多重置換同位体CO2分子を、少量試料で高精度に分析できる手法の開発を目指す。本手法により、微量試料測定・連続モニタリング・その場分析などが可能となり、原子力工学のみならず、エネルギー工学、薬学、地球惑星科学、歴史学などへの展開も考えられ、多重置換同位体分子の超高感度分析を基盤とした新たな学術の創生につながると期待できる。

  6. レーザー分光を用いた多重置換同位体分子計測法の開発

    Grant number:23K25123  2022.4 - 2025.3

    科学研究費助成事業  基盤研究(B)

    富田 英生, 阿部 理, 植村 立

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    本研究では、光吸収強度の高い中赤外領域と光共振器で感度を飛躍的に向上させたレーザー光吸収分光法を用いて、存在比の極めて低い多重置換同位体分子の光吸収量を測定して同位体分子の存在比を直接分析する手法を開発する。二酸化炭素を第一の目標として、存在比がppmレベルの多重置換同位体CO2分子を、少量試料で高精度に分析できる手法の開発を目指す。本手法により、微量試料測定・連続モニタリング・その場分析などが可能となり、原子力工学のみならず、エネルギー工学、薬学、地球惑星科学、歴史学などへの展開も考えられ、多重置換同位体分子の超高感度分析を基盤とした新たな学術の創生につながると期待できる。
    1. 中赤外キャビティーリングダウン吸収分光法の開発
    環境試料などへの応用を想定し、試料量が微量な同位体分子に対するキャビティーリングダウン分光(CRDS)を可能とするために、分光ガスセルを設計し、その主要構成部品を整備した。後述の試料導入法を想定した設計としたものの、圧力制御系に必要な物品の選定に時間を要したため、ガスセルの構築したが、その特性評価にはいたらなかった。また、CRDSにてclumped isotopeの存在比を高精度測定するために、HITRANデータベースを用いて吸収線の計算を行い、妨害吸収線の影響や吸収強度、また、レーザー波長可変領域などを考慮して、最適と思われる波長帯を選択した。これらの波長帯でのclumped isotopeの吸収ピークに対し、高精度測定に必要な試料ガスの条件(温度、圧力など)を評価した。さらに、既存のガスセルと広帯域波長可変な外部共振器型中赤外量子カスケードレーザーを用いてCO2のCRDSを行い、clumped isotopeである13C16O18O、13C16O17O、13C18O2の吸収ピークを測定できることを示した。この基礎実験を通じて、試料ガス導入系とガスセルについての問題点を抽出した。
    2. 試料導入法の開発と分析性能評価
    ・大気CO2や炭酸塩を対象とした高精度なclumped isotopeの存在比測定を行うために、真空系によるCO2精製装置および炭酸塩のリン酸分解装置の開発に着手した。また、CRDS法の分析性能を評価するための試料の調製・準備を行った。
    製品の調達に時間がかかるなどの問題があり、想定外の遅れが一部にあるものの、初年度に計画した内容を実施することができたため。
    ガスセル内の圧力を高精度に制御する必要があることが明らかとなっており、その対策を検討する必要があるが、計画通り研究を推進する予定である。

  7. 洞窟内での鍾乳石コア掘削による最終氷期以降の日本の気候変動の解明

    Grant number:20H00628  2020.4 - 2024.3

    日本学術振興会  科学研究費助成事業  基盤研究(A)

    植村 立, 阿部 理, 浅海 竜司

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\45370000 ( Direct Cost: \34900000 、 Indirect Cost:\10470000 )

    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。
    本計画では、主に沖縄地域の洞窟内で鍾乳石を掘削し、鍾乳石コアを採取することで、連続・高時間分解能の環境・気候変動のデータを得る。さらに、鍾乳石内に閉じ込められた流体包有物の同位体比分析をおこなうことで定量的な気候復元を行う。具体的な研究は以下の2点について実施した。
    (1)洞窟内でのボーリングコアを掘削:昨年度の沖縄本島での調査結果を踏まえて、本年度は沖縄県南大東島の山下洞において掘削を実施した。新型コロナウィルス感染症対策等によって、離島での掘削の実施は危ぶまれたものの12月に無事に実施することができた。洞内では4か所でのコア掘削により7本の石筍コアを得た。最長の試料は計126 cmのコア試料(異なる2本の石筍の可能性もある)であり、目視で見る限り昨年度の試料よりも土壌成分も少なく気候復元に適している良質な試料を得ることができた。一方で、成長軸からは部分的に逸脱していた。掘削作業は洞内の高い二酸化炭素濃度、固い石質、高湿度により掘削機材にとっても作業者にとっても過酷な環境であった。現在、これらの鍾乳石コアの切断・前処理を進め、年代測定、安定同位体比測定を進めている。
    (2)同位体・化学分析による気候変動データ
    昨年度改良した水蒸気連続フロー式の流体包有物の分析システムに参照試料を自動測定するためにオートサンプラーを組み入れる改良を行った。これにより、参照試料の測定は終夜運転が可能になった。また、分光式アナライザーの改良に向けた検討も行った。この装置を用いて国内の複数の鍾乳石の流体包有物同位体比測定を実施した。また、得られた試料の年代をウラン・トリウム法による放射性同位体分析をシンガポール南洋工科大学に於いて実施した。
    新型コロナウィルス感染症対策等によって、掘削や切断作業の遅れは発生したものの、2回目のコア掘削は1回目よりも良質の試料を得ることに成功した。炭酸カルシウムの酸素・炭素同位体比測定は機器の不調などもありやや遅延した。流体包有物の分析装置の測定は順調に進んだ。これらを総合的に判断して、「おおむね順調」とした。
    来年度は、鍾乳石コアの年代測定と同位体比分析を進める。また、これまでに得たデータの解析を進める。

  8. Construction of world’s most reliable deposited-aerosol database on the Anthropocene (from 1850 to 2020)

    Grant number:18H05292  2018.6 - 2023.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (S)

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    Authorship:Coinvestigator(s)  Grant type:Competitive

  9. Development of innovative data assimilation for reconstruction of weather and climate before 20th century

    Grant number:18H03794  2018.4 - 2021.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    YOSHIMURA KEI

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    We have established methods for isotope proxy data assimilation, which constrains the annual mean values of surface air temperature, precipitation, and sea surface temperature, and for paleo-weather data assimilation, which constrains the three-dimensional state of major atmospheric elements such as wind speed, air temperature, and water vapor content. In the study using the isotope proxy data assimilation method, it became possible to estimate the annual variability of the global distribution of surface temperature and precipitation from 850 to 2000, and in the study using the paleo-weather data assimilation method, it was possible to improve the estimation performance of state variables by assimilation using Gaussian transformation. With these results, we can say that we are ready to construct the Millennium Atmospheric Reanalysis.

  10. Reconstruction of East Asian climate during Holocene by using high-resolution isotope analyses

    Grant number:17KK0012  2018 - 2020

    Grants-in-Aid for Scientific Research  Fund for the Promotion of Joint International Research (Fostering Joint International Research)

    Uemura Ryu

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\13390000 ( Direct Cost: \10300000 、 Indirect Cost:\3090000 )

    To obtain a high-time resolution climate record in Okinawa region during the Holocene, we analyzed stalagmite samples. Sample measurements were conducted as an international joint research at each research institutions. We screened multiple samples and analyzed the samples collected in Minamidaito Island, Okinawa, Japan. An age model was established with precise U-Th ages (Error of 10-38 years) from present to 1.2 thousand years ago. Before the settlement started in 1900 CE, this island had been uninhabited. After 1900 CE, the land-use change due to sugar-cane plantation is clearly recorded as an abrupt shift of the carbon isotope record. The oxygen isotope record shows broad links with Indian and Asian climate records on centennial time scale. Although the travel plan was changed because of the COVID-19 pandemic, this project laid the foundation for international research.

  11. Variations and interactions of climate and the Antarctic Ice Sheet

    Grant number:17H06320  2017.6 - 2022.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)

    Kawamura Kenji

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    Field observations, satellite data analysis, and ice core analyses have been conducted, primarily focusing on East Antarctica. Through these efforts, the dynamics of the Antarctic ice sheet and its relationship with global climate have been elucidated, spanning from the present to glacial-interglacial scales. Successful data acquisitions have been made through hot-water drilling in ice shelves, and the observations of surface mass balance, bedrock topography and surface topography. The achievements also include age constraints and paleoenvironmental reconstructions using the Dome Fuji ice core. Advances have been made in understanding of dynamics at the marine-terminating ice sheet and the relationship between ice sheet mass and climate change. Furthermore, collaboration with other research groups has contributed to the understanding of the status and changes of the Antarctic ice sheet as well as validating numerical models.

  12. Quantitative decoding of stalagmite paleoclimatology by advanced isotopic analyses

    Grant number:16H02235  2016.4 - 2020.3

    Kano Akihiro

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    Authorship:Coinvestigator(s) 

    Quantitative paleoclimates were decoded from Japanese stalagmite by using newly-developed isotopic methods. This study develops the analytical system of carbonate clumped isotope, which was poorly applied in Japan, and also provides a Delta47-temperature calibration for the first time in Japan. New methods was applied to stalagmites collected from Hiroshima, Mie, and Okinawa. The analyses successfully separate the climate signal of oxygen isotopes into two fractions related with temperature and rainfall amount. The temperature fraction of the stalagmites indicate that air temperature was clearly higher in mid-Holocene than in the present. Unlike the previous studies on Chinese stalagmite, this study does not recognize a strong relationship between the stalagmite oxygen isotopes with the amount of rainfall or with the monsoon intensity.

  13. Isotopic analyses of fluid inclusions in speleothems for the Quaternary paleoclimate research

    Grant number:15H01729  2015.4 - 2019.3

    UEMURA Ryu

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    Authorship:Principal investigator 

    Grant amount:\45760000 ( Direct Cost: \35200000 、 Indirect Cost:\10560000 )

    The analytical method was simplified by automating valve operations and the data reduction process. We found an issue of isotopic re-equilibration caused by heating the stalagmite and conducted experiments to quantify this effect. This fundamental knowledge is important for future analysis. Although the analysis for the climate reconstruction was delayed by the malfunctions of the isotopic analyzers, we obtained isotopic record of fluid inclusions druing the last deglaciation from a stalagmite in Okinawa region. The temperature reconstruction, based on inclusion analyses, provides a quantitative estimate for the warming during the last deglaciation.

  14. Evaluation of anthropogenic air temperature change by using past aerosols in a Greenlandic ice core.

    Grant number:26257201  2014.4 - 2019.3

    Iizuka Yoshinori

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    Authorship:Coinvestigator(s) 

    The Southeastern Greenland Dome (SE-Dome) has both a high elevation and a high accumulation rate (1.01 m w.e. yr-1), which are suitable properties for reconstructing past environmental changes with a high time resolution. For this study, we measured the major ion fluxes in a 90-m ice core drilled from the SE-Dome region in 2015, and present the records of annual ion fluxes from 1957 to 2014. From 1970 to 2010, the trend of non-sea-salt (nss) SO42- flux decreases, whereas that for NH4+ increases, tracking well with the anthropogenic SOx and NH3 emissions mainly from North America. The result suggests that these fluxes reflect histories of the anthropogenic SOx and NH3 emissions. In contrast, the decadal trend of NO3- flux differs from the decreasing trend of anthropogenic NOx emissions.

  15. Climate analysis using sulfur stable isotope ratio from Antarctic snow and ice core

    Grant number:26550013  2014.4 - 2018.3

    UEMURA Ryu

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    Authorship:Principal investigator 

    Grant amount:\3900000 ( Direct Cost: \3000000 、 Indirect Cost:\900000 )

    Sulfate aerosols affect Earth’s radiative forcing through direct and indirect effects. Ice core data suggest minor changes in sulfate aerosols over the glacial cycles. However, the variations of source contributions of sulfate aerosols remain unclear. In this project, to estimate the changes in source contributions of sulfate aerosols in Antarctica, we analyzed sulfur isotopic ratios of surface snow and ice core. Sulfur isotope ratio of present-day surface snow over East Antarctica shows that the effects of the transport process are small, and major source of present-day sulfate aerosol is marine biogenic activity. The ice core data show that the sulfur isotopic ratio increased from the last glacial period to Holocene.

  16. Variations of climate, ocean and ice sheet over deglaciations from high resolution gas analyses of Antarctic ice cores

    Grant number:26241011  2014.4 - 2017.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    Kawamura Kenji, AZUMA Kumiko, HIRABAYASHI Motohiro, AOKI Shuji, UEMURA Ryu, SAITO Fuyuki, SUZUKI Kazue, NAKANO Shinya, OYABU Ikumi, Severinghaus Jeffrey P., Raymo Maureen, Lisiecki Lorraine, Parrenin Frederic, Brook Edward J., Rhodes Rachael

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    Authorship:Collaborating Investigator(s) (not designated on Grant-in-Aid)  Grant type:Competitive

    From the analyses of the Dome Fuji ice core, Antarctica, we reconstructed the variations of climatic periodicities, atmospheric composition, greenhouse gases, oxygen/nitrogen ratios, with special focus on deglaciation and global climate variations. In particular, we analyzed oxygen isotopic ratios and dust fluxes of the Dome Fuji ice core over the past 720,000 years and found that climatic instability is largest in middle glacial state. By feeding atmospheric carbon dioxide concentration on an accurate time scale from the Dome Fuji core into a climate-ice sheet model, we suggest that roles of northern hemisphere summer insolation, tilt of Earth's rotation axis and greenhouse gases are different for different deglaciations.

  17. Development of isotope analyses system for fluid inclusions of speleothem: toward quantitative temperature reconstructions

    Grant number:24681005  2012.4 - 2015.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (A)

    Uemura Ryu

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    Authorship:Principal investigator  Grant type:Competitive

    Grant amount:\24440000 ( Direct Cost: \18800000 、 Indirect Cost:\5640000 )

    Most of the terrestrial climate proxies in mid- and low-latitudes region are qualitative. Isotopic compositions of fluid-inclusion water in speleothems are promising tools, because they give quantitative information to reconstruct the past hydrological and temperature changes. Here, we have developed an isotope measurement technique for fluid inclusions in stalagmite, and applied the method to stalagmites in Okinawa, Japan. The developed system can measure the isotope ratios of fluid-inclusion water in nano-liter quantities. Data from the stalagmite samples of the modern and the last glacial period suggest that it is possible to reconstruct the past temperature.

  18. Study on the global environmental change with the various time scales by the various analysis of ice cores

    Grant number:21221002  2009.5 - 2014.3

    Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (S)

    MOTOYAMA Hideaki, AZUMA Kumiko, IIZUKA Yoshinori, UEMURA Ryu, SUZUKI Kazue, OHNO Hiroshi, KAWAMURA Kenji, FUJITA Shuji, MIYAKE Takayuki, HIRABAYASHI Motohiro, KURAMOTO Takayuki

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    Authorship:Coinvestigator(s)  Grant type:Competitive

    An ice core was drilled to a depth of 3035 m at the Dome Fuji station in Antarctica. Ice cores contain records of global environmental changes dating back to 720,000 years into the past. The age of the ice core was estimated with high accuracy, and a global standard record of climate and environmental changes was soon published. Further, a study of the mechanism of global environmental changes was developed. Results indicate that sulfate aerosol contributed to temperature change during the glacial-interglacial period. In addition, we clarified that the origin of the sulfate was not only the sea biological activity but also dust.

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Teaching Experience (On-campus) 29

  1. Frontier of Earth and Planetary Sciences

    2022

  2. Planetary Environmental Science

    2022

  3. First Year Seminar

    2022

  4. Seminar on Hydrospheric and Atmospheric Studies E

    2022

  5. Seminar on Climate Science 2E

    2022

  6. Seminar on Climate Science 1E

    2022

  7. Seminar on Climate Science 2C

    2022

  8. Seminar on Climate Science 2A

    2022

  9. Seminar on Climate Science 1C

    2022

  10. Seminar on Climate Science 1A

    2022

  11. 地球惑星科学セミナーI

    2022

  12. 地球惑星科学特別研究

    2022

  13. Seminar on Climate Science 2E

    2021

  14. Seminar on Climate Science 1E

    2021

  15. Seminar on Climate Science 2C

    2021

  16. Seminar on Climate Science 2A

    2021

  17. Seminar on Climate Science 1C

    2021

  18. Seminar on Climate Science 1A

    2021

  19. Climate science

    2021

  20. First Year Seminar B

    2021

  21. Seminar on Climate Science 2D

    2021

  22. Seminar on Climate Science 2B

    2021

  23. Seminar on Climate Science 1D

    2021

  24. Seminar on Climate Science 1B

    2021

  25. Seminar on Climate Science 2F

    2021

  26. Seminar on Climate Science 1F

    2021

  27. 気候科学セミナー2E

    2020

  28. First Year Seminar B

    2020

  29. 気候科学セミナー2A

    2020

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Teaching Experience (Off-campus) 6

  1. 琉球の自然

    2017.4 - 2018.3 University of the Ryukyus)

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    Level:Undergraduate (liberal arts) 

  2. 分析化学II

    2014.4 - 2018.3 University of the Ryukyus)

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    Level:Undergraduate (specialized) 

  3. 環境化学

    2014.4 - 2018.3 University of the Ryukyus)

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    Level:Undergraduate (specialized) 

  4. 地球化学

    2013.4 - 2014.3 University of the Ryukyus)

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    Level:Undergraduate (specialized) 

  5. 分析化学実験

    2010.4 - 2018.3 University of the Ryukyus)

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    Level:Undergraduate (specialized) 

  6. 共通教育化学実験

    2010.4 - 2018.3 University of the Ryukyus)

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    Level:Undergraduate (liberal arts) 

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Social Contribution 2

  1. 「鍾乳石に記録された地球の気候変動」

    Role(s):Lecturer

    豊橋市自然史博物館、あいちサイエンス・コミュニケーション・ネットワーク  名古屋大学出前授業  豊橋市自然史博物館  2021.11

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    Audience: Schoolchildren, Junior students, High school students, College students, Graduate students, Guardians, Researchesrs, General

    Type:Visiting lecture

  2. 地質標本館 特別展 「南極の過去と現在、そして未来-研究最前線からのレポート-」

    Role(s):Advisor, Informant, Contribution

    産業技術総合研究所 地質調査総合センター  地質標本館 特別展 「南極の過去と現在、そして未来-研究最前線からのレポート-」  2021.8 - 2021.12