気候システムにおける氷床変動の役割の解明

2015 Fiscal Year Annual Research Report

• Project/Area Number: 26247085
• Research Institution: The University of Tokyo
• Principal Investigator: 横山 祐典 東京大学, 大気海洋研究所, 教授 (10359648)
• Co-Investigator(Kenkyū-buntansha): 大河内 直彦 国立研究開発法人海洋研究開発機構, 生物地球化学研究分野, 分野長 (00281832) ; 池原 実 高知大学, 教育研究部 自然科学系 理学部門, 教授 (90335919)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 古気候 / 古海洋 / 南極 / 海水準

Outline of Annual Research Achievements

今年度の研究においては、氷床量を決定する上で重要な海水準について、温暖期に注目しながら研究を進めた。まず過去の海水準変動を決定する上で重要な、古水深情報を得るための手段の一つである、サンゴ礁を使った手法について、総説論文を執筆し、イギリスとアメリカの海水準研究者が取りまとめる本の一つの章として発表した。実際にサンゴ礁を使った海水準の研究として、世界最大のサンゴ礁であるグレートバリアリーフと石垣島などの地形及び年代を測定し、これまでにない詳細な地形データとともに新しいサンゴ礁形成モデルを提唱した。
南極地域においては、過去の温暖期で現在および今世紀末の大気二酸化炭素レベルと同様な時期である更新世（300-500万年前）の氷床変動について、宇宙線照射生成核種を使った新しい分析データと、既存のデータのコンパイレーションを行い、氷床モデルと比較検討した結果、当時の西南極氷床は全て融解していたとして、東南極氷床が全球の海水準上昇に与えた影響は少なかったとの結論を得た。これは、南極横断山脈の近傍にあり、西南極同様、海底に着底しているオーロラベーズンやウィルクスベーズンは融解した一方で、温暖化した際に引き起こされた水循環の強化による中緯度からの水蒸気供給量の上昇に伴って、東南極氷床のより内陸部が体積増加したためであることを初めて明らかにした。
また、氷床変動と環境変動との関連性を議論するために、アジア地域の陸域環境や南極の氷床下や縁辺に存在する湖の堆積物を地球化学的に分析し、氷床変動に伴った、地形及び生物地球化学的な新たな知見を得るに至った。

Current Status of Research Progress

1: Research has progressed more than it was originally planned.

Reason

今後の氷床変動を理解する上で、温暖期の海水準変動や極域氷床変動の変遷の高精度復元は極めて重要なテーマであるにもかかわらず、まだ定量的なデータが不足している状況にある。そのような状況を整理する上で、過去の環境復元指標の一つであるサンゴ礁についての総説論文を執筆し、それを受けて次年度の研究取りまとめにつなげる予定であったが、並行して進めていた南極氷床の更新世から現在への変遷に関する研究が、Nature Communication紙に掲載されるとともに、この結果を受けることで、国連の気候変動に関する政府間パネル(IPCC)の最新の報告書で見積もられている、当時の海水準上昇量が、１０－３０m現在より高かったとされているが、小さい見積もり量（１０m）の方がもっともらしいという重要な成果を得るに至った。また、世界最大のグレートバリアリーフにおける研究で、サンゴ礁の形成モデルが、これまで提唱されている枠組みだけでは説明できず、新しいモデルを考える必要があるという、当初の計画を大きく上回る成果を得ることができた。

Strategy for Future Research Activity

今後は、現在進めてきている海水準低下期、つまり氷床量拡大期についての研究を進める。海水準の高かった時期のデータは比較的浅い水深や現在の海水準よりも高い地域に存在するために、復元方法が多く存在するが、低海水準期のそれはサンプリングと分析とどちらにも困難さがある。多くの分析試料を高精度で測定する方法の開発を進め、精度の高い見積もりを行うことで、とくに南極氷床が気候寒冷期とどのような関係で融解と成長を繰り返していたかについて明らかにできるように研究を進めていく。

Research Products

• [Int'l Joint Research] University of Sydney/The Australian National University/University of Wollongong(オーストラリア)
  • Country Name: AUSTRALIA
  • Counterpart Institution: University of Sydney/The Australian National University/University of Wollongong
  • # of Other Institutions: 3
• [Int'l Joint Research] University of California Santa Cruze/Stanford University/Woods Hole Oceanographic Institute(米国)
  • Country Name: U.S.A.
  • Counterpart Institution: University of California Santa Cruze/Stanford University/Woods Hole Oceanographic Institute
  • # of Other Institutions: 1
• [Int'l Joint Research] Universidad de Granada(スペイン)
  • Country Name: SPAIN
  • Counterpart Institution: Universidad de Granada
• [Int'l Joint Research] University of Oxford(英国)
  • Country Name: UNITED KINGDOM
  • Counterpart Institution: University of Oxford
• [Int'l Joint Research] Ghent University/Geological Survey of Belgium/University of Liege(ベルギー)
  • Country Name: BELGIUM
  • Counterpart Institution: Ghent University/Geological Survey of Belgium/University of Liege
• [Int'l Joint Research]
  • # of Other Countries: 4
• [Journal Article] Holocene reef-growth dynamics on Kodakara Island (29°N, 129°E) in the Northwest Pacific. (2015)
  • Author(s): Hamanaka, N., Kan, H., Nakashima, Y., Yokoyama, Y., Okamoto, T., Ohashi, T., Adachi, H., Matsuzaki, H., and Hori, N.
  • Journal Title: GEOMORPHOLOGY Volume: 243 Pages: 27-39
  • Peer Reviewed
• [Journal Article] Late Holocene sea-level fall and turn-off of reef flat carbonate production: Rethinking bucket fill and coral reef growth models. (2015)
  • Author(s): Harris, D.L., Webster, J.M., Vila-Concejo, A., Hua, Q., Yokoyama, Y., and Reimer, P.J.
  • Journal Title: Geology Volume: 43 Pages: 175-178
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Sources of dissolved inorganic carbonin two small streams with different bedrock geology: Insights from carbon isotopes. (2015)
  • Author(s): Ishikawa, N., Tayasu, I., Yamane, M., Yokoyama, Y., Sakai, S., and Ohkouchi, N.
  • Journal Title: RADIOCARBON Volume: 57 Pages: 1-10
  • Peer Reviewed
• [Journal Article] Chlorophyll a-specific Δ14C, δ13C and δ15N values in stream periphyton: implications for aquatic food web studies. (2015)
  • Author(s): Ishikawa, N.F., Yamane, M., Suga, H., Ogawa, N.O., Yokoyama, Y., and Ohkouchi, N.
  • Journal Title: Biogeosciences Volume: 12 Pages: 6781-6789
  • Peer Reviewed
• [Journal Article] Submerged karst landforms observed by multibeam bathymetric survey in Nagura Bay, Ishigaki Island, southwestern Japan. (2015)
  • Author(s): Kan, H, Urata, K., Nagao, M., Hori, N., Fujita, K.,Yokoyama, Y., Nakashima, Y., Ohashi, T., Goto, K., Suzuki, A.
  • Journal Title: Geomorphology Volume: 229 Pages: 112-124
  • Peer Reviewed
• [Journal Article] Paleoenvironmental studies of fossils of marine sessile organisms in the brackish water mass of a submarine cave, Okinawa, JAPAN. (2015)
  • Author(s): Kitamura, A., Tamaki, C., Miyairi, Y., Yokoyama, Y.
  • Journal Title: Journal of Cave and Karst Studies Volume: 76 Pages: 164-172
  • Peer Reviewed
• [Journal Article] Bottom water variability in the subtropical northwestern Pacific from 26 ka to present based on Mg/Ca and stable carbon and oxygen isotopes of benthic foraminifera. (2015)
  • Author(s): Kubota, Y., Kimoto, K., Itaki, T., Yokoyama, Y., Miyairi, Y., and Matsuzaki, H.
  • Journal Title: Climate of the Past Volume: 11 Pages: 803-824
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] A new method for calibrating a boron isotope paleo-pH proxy using massive Porites corals. (2015)
  • Author(s): Kubota, K., Yokoyama, Y., Ishikawa, T., and Suzuki, A.
  • Journal Title: Geochemistry, Geophysics, Geosystems Volume: 16 Pages: 3333-3342
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Migration history of an ariid Indian catfish reconstructed by otolith Sr/Ca and δ18O micro-analysis. (2015)
  • Author(s): Kubota, K., Yokoyama, Y., Kawakubo, Y., Seki, A., Sakai, S., Ajithprasad, P., Maemoku, H., Osada, T., and Bhattacharya, S.K.
  • Journal Title: Geochemical Journal Volume: 49 Pages: 469-480
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] An approach for measuring the 129I/127I ratio in fish samples. (2015)
  • Author(s): Kusuno, H., Matsuzaki, H., Nagata, T., Miyairi, Y., Yokoyama, Y., Ohkouchi, N., and Tokuyama, H.
  • Journal Title: Nuclear Instruments and Methods in Physics Research B Volume: 361 Pages: 414-418
  • Peer Reviewed
• [Journal Article] Climate-induced changes in sediment supply revealed by surface exposure dating of Sijiquan River terraces, northeastern Tibet. (2015)
  • Author(s): Shirahama, Y., Miyairi, Y., He, H., Fu, B., Echigo, T., Kano, K., Yokoyama, Y., and Ikeda, Y.
  • Journal Title: Geomorphology Volume: 235 Pages: 15-26
  • Peer Reviewed
• [Journal Article] Exposure age and ice-sheet model constraints on Pliocene East Antarctic ice sheet dynamics. (2015)
  • Author(s): Yamane, M., Yokoyama, Y., Abe-Ouchi, A., Obrochta, S., Saito, F., Moriwaki, K. and Matsuzaki, H.
  • Journal Title: Nature Communications Volume: 6 Pages: 7016
  • DOI: 10.1038/ncomms8016
  • Peer Reviewed / Open Access / Acknowledgement Compliant
• [Journal Article] Biogeochemistry and limnology in Antarctic subglacial weathering: Evidence of the linkage between subglacial silicon input and primary producers in a perennially ice-covered lake. (2015)
  • Author(s): Takano, Y., Kojima, H., Takeda, E., Yokoyama, Y., and Fukui, M.
  • Journal Title: Progress in Earth and Planetary Science Volume: 2 Pages: 1-15
  • Peer Reviewed / Open Access
• [Journal Article] 将来の気候・環境変動理解のための近過去復元研究 (2015)
  • Author(s): 横山祐典・中塚武・多田隆治
  • Journal Title: 地球環境 Volume: 20 Pages: 189-194
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Coral reefs (2015)
  • Author(s): Yokoyama, Y. and Esat, T. M.
  • Journal Title: Handbook of Sea-Level Research Volume: 1 Pages: 104-124
  • DOI: 10.1002/9781118452547.ch7
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Journal Article] Different response to Indian monsoon between inner and outer region of the Gulf of Aden recorded in the deep-sea sediments (2015)
  • Author(s): Isaji, Y., Kawabata, H., Ohkochi, N., Murayama, M., and Tamaki, K.
  • Journal Title: Journal of Geophysical Research-Ocean Volume: 120 Pages: 7253-7270
  • Peer Reviewed
• [Journal Article] Terrestrial environmental changes around the Gulf of Aden over the last 210 kyr deduced from the sediment n-alkane record: Implications for the dispersal of Homo sapiens (2015)
  • Author(s): Isaji, Y., Kwahata, H., Ohkouchi, N., Murayama, M., and Tamaki, K.
  • Journal Title: Geophysical Research Letters Volume: 42 Pages: 1880-1887
  • Peer Reviewed
• [Journal Article] Biochemical and physiological bases for the application of carbon and nitrogen isotopes to the environmental and ecological studies. (2015)
  • Author(s): Ohkouchi, N., Ogawa, N. O., Chikaraishi, Y., Tanaka, H., and Wada, E.
  • Journal Title: Progress in Earth and Planetary Science Volume: 2 Pages: 1-17
  • Peer Reviewed
• [Presentation] Uplift rates of the marine terraces in the south coast of Japan deduced from in-situ cosmogenic 10Be and 26Al (2015)
  • Author(s): Gen Nagano, Yusuke Yokoyama, Atsunori Nakamura, Hideaki Maemoku, Yosuke Miyairi, and Hiroyuki Matsuzaki
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: USA SanFrancisco Moscone Convention Center
  • Year and Date: 2015-12-14 – 2015-12-18
  • Int'l Joint Research
• [Presentation] High resolution and continuous reconstruction of Blake and Post Blake excursions using Cosmogenic Radio Nuclides (CRN) in the Antarctic ice core (2015)
  • Author(s): Yokoyama, Y, Tsunekawa, R., Takahashi, S., Miyairi, Y., Aze, T., Horiuchi, K., Matsuzaki, H., and Motoyama, H
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: USA SanFrancisco Moscone Convention Center
  • Year and Date: 2015-12-14 – 2015-12-18
  • Int'l Joint Research / Invited
• [Presentation] 北西太平洋の海洋酸性化が塊状ハマサンゴに与える影響 (2015)
  • Author(s): 窪田 薫, 横山 祐典, 石川 剛志, 鈴木 淳, 石井 雅男
  • Organizer: 2015年度 日本サンゴ礁学会
  • Place of Presentation: 日本 東京 慶應義塾大学三田キャンパス
  • Year and Date: 2015-11-26 – 2015-11-29
  • Invited
• [Presentation] Late Holocene History of the Fuji Five Lakes (Japan) (2015)
  • Author(s): Laura Lamair, Aurelia Hubert-Ferrari, Evelien Boes, Shinya Yamamoto, Ed Garrett, Vanessa M. A. Hey- vaert, Osamu Fujiwara, Yusuke Yokoyama, Marc De Batist, The QuakeRecNankai Team.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Response of the Great Barrier Reef to sea level and environmental changes over the past 30 ka (2015)
  • Author(s): Jody M Webtster, Juan Carlos Braga, Marc Humblet, Don Potts, Yasufumi Iryu, Yokoyama Yusuke, Kazuhiko Fujita, Raphael Bourillot, Tezer Esat, Stewart Fallon, William G Thompson, Alexander Thomas, Hironobu Kan, Helen V McGregor, Hinestrosa Hinestrosa
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Sea level record obtained from submerged the Great Barrier Reef coral reefs for the last 30 ka (2015)
  • Author(s): Yusuke Yokoyama, Tezer M Esat, William G Thompson, Alexander L Thomas, Jody M Webster, Yosuke Miyairi, Chikako Sawada, Takahiro Aze, Hiroyuki Matsuzaki, Jun’ichi Okuno, Stewart Fallon, Juan-Carlos Braga, Marc Humblet, Yasufumi Iryu, Donald C Potts, Kazuhiko Fujita, Atsushi Suzuki, Hironobu Kan.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Ice sheet surge and 25 m rapid sea-level rise at Younger Dryas 13,000 years ago. (2015)
  • Author(s): Tezer M Esat, Alexander L Thomas, Yusuke Yokoyama, Jody M Webster, Juan C Braga, Marc Humblet, Don C Potts, Yasufumi Iryu, William G Thompson, Stewart Fallon, Gustavo Hinestrosa.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Geological record of post-LGM Antarctic Ice Sheet retreat: implications for sea-level rise (2015)
  • Author(s): Anderson, John, B., and Yokoyama, Yusuke
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research / Invited
• [Presentation] Testing the hypothesis on cognitive evolution of modern humans' learning ability in light of past-climatic changes. (2015)
  • Author(s): Minoru Yoneda, Ayako Abe-Ouchi, Yusuke Yokoyama, Hodaka Kawahata, Takashi Oguchi, Takayuki Omori, Yasuhisa Kondo.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Larger CO2 source at the equatorial Pacific during the last deglaciation reconstructed from boron isotopes of Tahitian corals. (2015)
  • Author(s): Kaoru Kubota, Yusuke Yokoyama, Tsuyoshi Ishikawa, Stephen P Obrochta, Atsushi Suzuki
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Trace element in coral recorded strong coupling between Western Pacific Sea Surface Temperature and ENSO and PDO during the 18th century. (2015)
  • Author(s): Kengo Tsuzuki, Yusuke Yokoyama, Wataru Sakashita, Yuta Kawakubo, Arisa Seki, Daisuke Araoka, Atsushi Suzuki.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Environment reconstruction by coastal sediment core from Andaman Sea and relationship with human activity. (2015)
  • Author(s): Yuki Ota, Hodaka Kawahata, Masashi Murayama, Mayuri Inoue, Thura Aung, Yusuke Yokoyama, Yosuke Miyairi.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Influences of the El Nino-Southern and Pacific Decadal Oscillations on the early summer rainfall in central Japan during the past four centuries. (2015)
  • Author(s): Wataru Sakashita, Yusuke Yokoyama, Hiroko Miyahara, Yasuhiko T Yamaguchi, Takahiro Aze, Stephen P Obrochta, Takeshi Nakatsuka.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Environmental change and its influence on human society in Japan during the last 3000 years. (2015)
  • Author(s): Hodaka Kawahata, Megumi Matsuoka, Aya Togami, Naomi Harada, Katsunori Kimoto, Yusuke Yokoyama, Yosuke Miyairi, Masafumi Murayama, Michinobu Kuwae, Hiroyuki Matsuzaki, Yuichiro Tanaka
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Sea surface temperature reconstructions during mid- to late- Holocene using modern and fossil otoliths from the Gulf of Kutch, Western India. (2015)
  • Author(s): Shota Amekawa, Kaoru Kubota, Yosuke Miyairi, Arisa Seki, Yuta Kawakubo, Saburo Sakai, P. Ajithprasad, Hideki Maemoku, Toshiki Osada, Yusuke Yokoyama.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Millenial scale changes in Uk' 37 and TEXH 86 derived temperature in the northern South China Sea during the past 45,000 years (2015)
  • Author(s): Da-Cheng Lin, Min-Te Chen, Masanobu Yamamoto, Yusuke Yokoyama
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Coral genes related to elements in seawater and their potential influence on variations in skeletal climate proxies. (2015)
  • Author(s): Tomoko Bell, Akira Iguchi, Atsushi Suzuki, Arisa Seki, Yusuke Yokoyama
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Evaluating the sea surface temperature reconstruction at the extreme latitudinal limits of Porites using Sr/Ca and oxygen isotopes. (2015)
  • Author(s): Shoko Hirabayashi, Yusuke Yokoyama, Atsushi Suzuki, Yuta Kawakubo, Yosuke Miyairi, Takashi Okai, Satoshi Nojima
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Compound-specific 14C dating of IODP Expedition 318 core U1357A obtained off the Wilkes Land coast, Antarctica. (2015)
  • Author(s): Masako Yamane, Yusuke Yokoyama, Yosuke Miyairi, Hisami Suga, Hiroyuki Matsuzaki, Robert B Dunbar, Naohiko Ohkouchi.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Late Quaternary tectonic evolution of the Kumkol Basin at the northeastern margin of the Tibetan Plateau quantified by using in situ cosmogenic radionuclides (2015)
  • Author(s): Yoshiki Shirahama, Yosuke Miyairi, Honglin He, Bihong Fu, Ken-ichi Kano, Tomoo Echigo, Yusuke Yokoyama, Yasutaka Ikeda
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Reconstructions of regional radiocarbon marine reservoir ages in Hokkaido, Japan using pre-bomb kelp specimens (2015)
  • Author(s): Youske Miyairi, Yusuke Yokoyama, Hiroyuki Matsuzaki
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Relation between tectonic uplift rates and erosion rates in the Kiso Range (central Japanese Alps) from in situ cosmogenic nuclides. (2015)
  • Author(s): Atsunori Nakamura, Yusuke Yokoyama, Osamu Fujiwara, Kazuaki Hori, Yosuke Miyairi, Hiroyuki Matsuzaki.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Progress in paleoearthquake and paleotsunami research along the Nankai Trough following the 2011 Tohoku earthquake. (2015)
  • Author(s): Ed Garrett, Osamu Fujiwara, Vanessa M.A. Heyvaert, Marc De Batist, Yusuke Yokoyama, Helmut Bruckner, Philip Garrett, Evelien Boes, Yosuke Miyairi, The QuakeRecNankai team
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-26 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Effects of ocean acidification on bivalve nutrient uptake and biomineralization as traced with radiocarbon. (2015)
  • Author(s): Yue Chin Chew, Yusuke Yokoyama, Kozue Nishida, Atsushi Suzuki, Yosuke Miyairi, Shoko Hirabayashi, Mizuho Sato, Yukihiro Nojiri.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Sea-level fluctuations from late MIS3 to MIS2, inferred from large benthic foraminiferal assemblages: IODP Exp. 325, Great Barrier Reef Environmental Changes. (2015)
  • Author(s): Kazuhiko Fujita, Noriko Yagioka, Choko Nakada, Yosuke Miyairi, Yusuke Yokoyama, Hironobu Kan, Jody M Webster.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Relative sea level records during the LGM based on newly obtained sediments from the Bonaparte Gulf, Australia. (2015)
  • Author(s): Takeshige Ishiwa, Yusuke Yokoyama, Miyairi Yosuke, Stephen Obrochta, Takenori Sasaki, Akihisa Kitamura, Katsuto Uehara, Minoru Ikehara, Atsushi Suzuki, Ken Ikehara, Katsunori Kimoto, Julien Bourget, Hiroyuki Matsuzaki.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] PHREATIC OVERGROWTHS ON SPELEOTHEMS ON MINAMI-DAITO ISLAND IN NORTHERN PHILIPPINE SEA AS A HOLOCENE SEA LEVEL INDICATOR. (2015)
  • Author(s): Blaz Miklavic, Kensaku Urata, Yusuke Yokoyama, Akihiro Kano, Hironobu Kan.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Quantifying bioerosion traces in deglacial fossil reef sequences: Spatio-temporal patterns from IODP Expedition 325 cores, Great Barrier Reef, Australia (2015)
  • Author(s): Madhavi A Patterson, Jody M Webster, Pat Hutchings, Marc Humblet, Juan Carlos Braga, Yusuke Yokoyama
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Deglacial sea-level history preserved in Hawaiian drowned reef terraces and implications for understanding global records (2015)
  • Author(s): Kelsey L. Sanborn, Jody M. Webster, Yusuke Yokoyama, Stephen M. Eggins, Juan-C Braga, Andrea Dutton, David A. Clague, Jennifer B. Paduan, John J. Rooney, John R. Hansen, Daniel Wagner
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Radiometric and luminescence dating of historical tsunamis and storm deposits from Shi- rasuka, south central Japan. (2015)
  • Author(s): Ed Garrett, Vanessa M.A. Heyvaert, Osamu Fujiwara, Marc De Batist, Helmut Bruckner, Yusuke Yokoyama, Jan Walstra, Svenja Riedesel, Dominik Brill, Yosuke Miyairi, Stephen Obrochta, The QuakeRec- Nankai team
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] A diatom inferred record of lake hydrological variability during the last 900 years in Lutzow-Holm Bay, East Antarctica. (2015)
  • Author(s): Rachel C Rudd, Jonathan J Tyler, John Tibby, Yusuke Yokoyama, Manabu Fukui, Yoshinori Takano
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Towards a North Atlantic Plio-Pliestocene sediment color climate index (2015)
  • Author(s): Stephen P Obrochta, Ian Bailey, James ET Channel, David A Hodell, Axel Timmermann, Chuang Xuan, Yusuke Yokoyama, Thomas J Crowley
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Application of radiocarbon dating to Calyptogena bivalve shells present in a cold seep environement: An example of Nankai subduction zone (2015)
  • Author(s): Kazuhiro Yagasaki, Shin’ichi Kuramoto, Juichiro Ashi, Yusuke Yokoyama, Yosuke Miyairi.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] The last 300 years of sedimentation in the Fuji Five Lakes: the impact of natural disasters with a special focus on earthquakes. (2015)
  • Author(s): Laura Lamair, Aurelia Hubert-Ferrari, Evelien Boes, Sabine Schmidt, Shinya Yamamoto, Osamu Fujiwara, Ed Garrett, Vanessa M.A. Heyvaert, Yosuke Miyairi, Yusuke Yokoyama, Marc De Batist, Helmut Bruckner, The QuakeRecNankai Team.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Uplift of Shikine Island on the northern Zenisu Ridge off Central Japan during the past 1000 years: Evidence from analyses of emerged marine sessile assemblages (2015)
  • Author(s): Takafumi Imai, Akihisa Kitamura, Mami Ito, Yosuke Miyairi, Yusuke Yokoyama, Kaoru Sugihara, Toshiyuki Yamaguchi.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Holocene geohazard events on the southern Izu Peninsula, central Japan. (2015)
  • Author(s): Akihisa Kitamura, Yoko Ohashi, Hidemi Ishibashi, Yosuke Miyairi, Yusuke Yokoyama, Ryoya Ikuta, Yasuhiro Ito, Masayuki Ikeda, Taketo Shimano, Shigeto Kawate
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Exploring the potential of Lake Hamana (Shizuoka Prefecture, Japan) to hold a long and reliable sedimentary record of paleo-earthquakes and -tsunami along the Nankai-Suruga Trough. (2015)
  • Author(s): Evelien Boes, Osamu Fujiwara, Ed Garrett, Laura Lamair, Marc De Batist, Vanessa M.A. Heyvaert, Yusuke Yokoyama, Yosuke Miyairi, Toshiaki Irizuki, Svenja Riedesel, Helmut Brueckner, Aurelia Hubert-Ferrari.
  • Organizer: THE INTERNATIONAL UNION FOR QUATERNARY RESEARCH：INQUA XIX CONGRESS
  • Place of Presentation: 日本 名古屋 国際会議場
  • Year and Date: 2015-07-22 – 2015-08-02
  • Int'l Joint Research
• [Presentation] Mid to Late Holocene climate and sea level changes and its relations to culture in Japan (2015)
  • Author(s): Yokoyama, Y
  • Organizer: American Geophysical Union (AGU) Chapman Conference “Evolution of the Asian Monsoon and its impact on Landscape, Environment and Society: Using the Past as the Key to the Future”
  • Place of Presentation: Chinese University of Hong Kong, Hong Kong SAR, China
  • Year and Date: 2015-06-14 – 2015-06-19
  • Int'l Joint Research / Invited
• [Presentation] サンゴの生物鉱化作用と古環境復元 (2015)
  • Author(s): 横山 祐典, ベル 智子, 平林 頌子, 宮入 陽介, 窪田 薫, 関 有沙, 井口 亮, 鈴木 淳
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
  • Invited
• [Presentation] 極微量長半減期同位体を用いた海洋生態系・物質動態解明 (2015)
  • Author(s): 横山 祐典，宮入 陽介，大河内 直彦，小川 奈々子，松崎 浩之，楠野 葉瑠香，永田 俊
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
  • Invited
• [Presentation] 和歌山県すさみ町における完新世の古環境変遷と古津波堆積物 (2015)
  • Author(s): 千葉 崇，後藤 和久，藤野 滋弘，横山 祐典，宮入 陽介，沢田 近子，石澤 尭史，西村 裕，菅原 大助，Goff James
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 完新世におけるバルト海の河口域堆積物を用いた古環境復元（Exp. 347） (2015)
  • Author(s): オブラクタ スティーブン，Kotilainen A.T.，Hyttinen O.，Andren T.，Ryabchuk D.，Snowball I.，Yokoyama Y.，Exp. 347 Science Party
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 津波堆積物の高精度放射性炭素年代測定 (2015)
  • Author(s): 宮入 陽介，横山 祐典，沢田 近子，石澤 尭史，西村 裕一，菅原 大助，川又 隆央，後藤 和久
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] ベイズ理論に基づく津波堆積物の高精度放射性炭素年代決定の試み (2015)
  • Author(s): 石澤 尭史，後藤 和久，横山 祐典，宮入 陽介，沢田 近子，西村 裕一，菅原 大助
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] Last glacial to deglacial biotic changes on the Great Barrier Reef from offshore boreholes (2015)
  • Author(s): HUMBLET, Marc，WEBSTER, Jody M.，BRAGA, Juan carlos，IRYU, Yasufumi，POTTS, Don C.，YOKOYAMA, Yusuke，ESAT, Tezer M.，FALLON, Stewart，THOMPSON, William G.，THOMAS, Alexander L.,
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] マウンダー極小期の宇宙線強度変動 (2015)
  • Author(s): 宮原 ひろ子，堀内 一穂，門叶 冬樹，加藤 和浩，森谷 透，横山 祐典，松崎 浩之，本山 秀明，片岡 龍峰
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 沿岸海底地形学および関係諸科学のための高解像度マルチビーム測深調査 (2015)
  • Author(s): 菅 浩伸，長尾 正之，渡久地 健，堀 信行，浦田 健作，藤田 和彦，横山 祐典，中島 洋典，長谷川 均，中井 達郎，後藤 和久，片桐 千亜紀，小野 林太郎，Sinniger Frederic，Prasetia Rian，波利井 佐紀，井口 亮，鈴木 淳
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 近年の北西太平洋の海洋酸性化がハマサンゴの石灰化に与える影響 (2015)
  • Author(s): 窪田 薫, 横山 祐典, 石川 剛志, 鈴木 淳, 石井 雅男
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
  • Invited
• [Presentation] 氷期の急激な気候変動と大西洋深層循環の熱的閾値 (2015)
  • Author(s): 岡 顕，阿部 彩子，横山 祐典，川村 賢二，羽角 博康
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 宇宙線照射生成核種に基づく木曽山脈の隆起・侵食史 (2015)
  • Author(s): 中村 淳路，横山 祐典，藤原 治，堀 和明，宮入 陽介，松崎 浩之
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 宇宙線生成核種を用いた和歌山県南部と高知県南西部の海岸段丘面の年代測定 (2015)
  • Author(s): 長野 玄，横山祐典，中村淳路，宮入陽介，前杢英明，松崎浩之
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 宇宙線生成核種によるチベット高原北東縁共和盆地の発達過程の解明 (2015)
  • Author(s): 白濱 吉起，宮入 陽介，何 宏林，狩野 謙一，岡田 真介，横山 祐典，池田 安隆
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 日本海古環境データベース(JSPED)の構築とその応用 (2015)
  • Author(s): 尾崎 和海，平瀬 祥太郎，草間 優子，岩崎 渉，横山 祐典，川幡 穂高，多田 隆治，山本 正伸
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 式根島における隆起貝層からみた後期完新世の隆起:1498・1605年の大津波の波源域に関する含蓄 (2015)
  • Author(s): 今井 啓文，北村 晃寿，伊藤 真実，宮入 陽介，横山 祐典，山口 寿之，杉原 薫，安藤 雅孝，三井 雄太，金 幸隆，中村 衛
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 過去400年間の日本の初夏降水量とENSOの関係 (2015)
  • Author(s): 坂下渉, 横山祐典, 宮原ひろ子, 山口保彦, 阿瀬貴博, Stephen P. Obrochta, 中塚武
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 高時間解像度放射性炭素年代測定によるBonaparte湾の相対的海水準復元 (2015)
  • Author(s): 石輪 健樹，横山 祐典，宮入 陽介，オブラクタ スティーブン，佐々木 猛智，池原 実，上原 克人，北村 晃寿，鈴木 淳，池原 研，木元 克典，ボゥジェ ジュリアン，松崎 浩之
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 東海沖南海トラフ巨大シロウリガイコロニーにおける貝殻の放射性炭素年代を用いた断層活動に伴う間欠的メタン流出の検証 (2015)
  • Author(s): 矢ヶ崎 一浩，倉本 真一，芦 寿一郎，横山 祐典，宮入 陽介
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 炭素同位体比を用いた海藻の生育履歴の推定 (2015)
  • Author(s): 佐藤 菜央美，福田 秀樹，宮入 陽介，横山 祐典，永田 俊
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Presentation] 過去500年間のアンダマン海沿岸環境の復元 (2015)
  • Author(s): 太田 雄貴，川幡 穂高，横山 祐典，村山 雅史，井上 麻夕里，宮入 陽介
  • Organizer: 2015年度 地球惑星科学連合大会
  • Place of Presentation: 日本 千葉 幕張メッセ
  • Year and Date: 2015-05-24 – 2015-05-28
• [Remarks] 横山祐典研究室ウェブサイト
  • URL: http://aces.aori.u-tokyo.ac.jp/yokoyama/index.html