Faculty Profiles - UEMURA Ryu

Papers - UEMURA Ryu

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Multidecadal hydroclimate responses to volcanic forcing in the Mid-Holocene Reviewed International coauthorship

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

Communications Earth & Environment Vol. 6 page： Article number: 101 2025.2

Contrasting Responses of Ion Concentration Variations to Atmospheric Patterns in Central Himalayan Ice Cores Reviewed International journal

Tsushima, A; Esashi, N; Matoba, S; Iizuka, Y; Uemura, R; Adachi, K; Kinase, T; Hirabayashi, M; Kawakami, K; Kayastha, RB; Fujita, K

JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES Vol. 130 ( 2 ) 2025.1

A snapshot of the climate in the Middle Pleistocene inferred from a stalagmite from central Japan Reviewed International coauthorship International journal

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

Geoscience Letters Vol. 11 ( 1 ) page： 41 2024.9

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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