Reconstruction of West Antarctic Ice Sheet during the Holocene

2009 Fiscal Year Final Research Report

• Project/Area Number: 19340158
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Japan Agency for Marine-Earth Science and Technology
• Principal Investigator: OHKOUCHI Naohiko Japan Agency for Marine-Earth Science and Technology, 海洋・極限環境生物圏領域, プログラムディレクター (00281832)
• Co-Investigator(Kenkyū-buntansha): YOKOYAMA Yusuke 東京大学, 海洋研究所, 准教授 (10359648)
• Project Period (FY): 2007 – 2009
• Keywords: 西南極氷床 / 完新世 / 放射性炭素年代 / バイオマーカー / 水素同位体比

Research Abstract

We measured radiocarbon ages of fatty acids extracted and purified from Ross Sea sediments, Antarctica. It indicated that ice edge of West Antarctic Ice Sheet substantially retreated during the last 5000 years. The major deglaciation of WAIS occurred in the Holocene with a large time-lag from Northern Hemisphere ice sheets.

Research Products

• [Journal Article] Developing ultra small-scale radiocarbon sample measurement at University of Tokyo. (2010)
  • Author(s): Yokoyama Y, Koizumi M, Matsuzaki H, Miyairi Y, Ohkouchi N
  • Journal Title: Radiocarbon.
  • Peer Reviewed
• [Journal Article] 化合物レベル放射性炭素年代法の原理と南極縁辺海堆積物への応用. (2009)
  • Author(s): 大河内直彦
  • Journal Title: 第四紀研究 48 Pages: 131-142
  • Peer Reviewed
• [Journal Article] Fractionation of hydrogen isotopes during phytol biosynthesis. (2009)
  • Author(s): Chikaraishi Y, Tanaka R, Tanaka A, Ohkouchi N
  • Journal Title: Organic Geochemistry 40 Pages: 569-573
  • Peer Reviewed
• [Journal Article] Origins of archaeal tetraether lipids in sediments: Insights from radiocarbon analysis. (2008)
  • Author(s): Shah SR, Mollenhauer G, Ohkouchi N, Eglinton TI, Pearson A
  • Journal Title: Geochimica et Cosmochimica Acta 72 Pages: 4577-4594
  • Peer Reviewed
• [Journal Article] Compound-specific radiocarbon dating of Ross Sea sediments: A prospect for constructing chronologies in high-latitudinal oceanic sediments. (2008)
  • Author(s): Ohkouchi N, Eglinton TI
  • Journal Title: Quaternary Geochronology 3 Pages: 235-243
  • Peer Reviewed
• [Journal Article] Sources and transformation processes of pheopigments: Carbon and hydrogen isotopic evidence from Lake Haruna, Japan. (2007)
  • Author(s): Chikaraishi Y, Matsumoto K, Kitazato H, Ohkouchi N
  • Journal Title: Organic Geochemistry 38 Pages: 985-1001
  • Peer Reviewed
• [Journal Article] 深海底堆積物の解析による最終氷期以降の西南極氷床の消長. (2007)
  • Author(s): 能美仁博, 横山祐典, 三浦英樹, 大河内直彦
  • Journal Title: 第四紀研究 46 Pages: 103-117
  • Peer Reviewed
• [Presentation] Future directions in probing global biogeochemical cycles. (2009)
  • Author(s): Ohkouchi, N.
  • Organizer: IVENST keynote lecture
  • Place of Presentation: Bremen
  • Year and Date: 2009-11-23
• [Presentation] Methods for detecting Holocene sea level signals in Antarctica. (2009)
  • Author(s): Yokoyama, Y. Yamane, M., Ohkouchi, N., Matsuzaki, H.
  • Organizer: Geological Society of America.
  • Year and Date: 2009-11-06
• [Presentation] Development of ultra-small scale radiocarbon sample measurement at MALT AMS (2009)
  • Author(s): Koizumi, M., Yokoyama, Y., Matsuzaki, H., Miyairi, Y., Ohkouchi, N.
  • Organizer: Tokyo University.
  • Place of Presentation: Radiocarbon Conference, Rome.
  • Year and Date: 2009-06-12
• [Presentation] 海洋の生物地球化学的循環の変動. (2009)
  • Author(s): 大河内直彦
  • Organizer: 地球惑星科学連合大会2009
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2009-05-20
• [Presentation] Development a novel method to isolate fatty acids for compound-specific radiocarbon dating to reconstruct West Antarctic Ice Sheet melting history. (2008)
  • Author(s): Koizumi, M., Yokoyama, Y., Anderson, J.B., Ohkouchi, N.
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco
  • Year and Date: 2008-12-18
• [Presentation] Application of compound-specific radiocarbon dating for Antarctic margin sediments. (2008)
  • Author(s): Ohkouchi, N., Koizumi, M., Anderson, J.B., Eglinton, T.I., Miura, H., Yokoyama, Y.
  • Organizer: American Geophysical Union Fall Meeting
  • Place of Presentation: San Francisco
  • Year and Date: 2008-12-17
• [Presentation] 西南極氷床変動史の復元に向けた化合物レベル放射性炭素年代測定法の開発. (2008)
  • Author(s): 小泉真認, 横山祐典, Anderson, J., 大河内直彦
  • Organizer: 日本地球化学会
  • Place of Presentation: 東大
  • Year and Date: 2008-09-15
• [Presentation] 西南極氷床の完新世における融解. (2008)
  • Author(s): 大河内直彦, 横山祐典, 三浦英樹, 豊田倫子, 力石嘉人, 小泉真認, Eglinton, T.I., 北里洋
  • Organizer: 日本第四紀学会シンポジウム「第四紀後期の気候変動と地球システムの挙動ーその原因とメカニズムの解明に向けてー」
  • Place of Presentation: 東京大学小柴ホール
  • Year and Date: 2008-08-25
• [Presentation] Sea-level changes during the time into and out of the Last Glacial Maximum. (2008)
  • Author(s): Yokoyama, Y., Suga, H., Esat, T.M., Ohkouchi, N., Lambeck, K.
  • Organizer: PAGES/IMAGES Workshop“Empirical Constraints on Future Sea-Level Rise
  • Place of Presentation: Bern
  • Year and Date: 2008-08-25
• [Presentation] Application of compound-specific radiocarbon dating for studying West Antarctic Ice Sheet during the Late Quaternary. (2007)
  • Author(s): Ohkouchi N, Eglinton TI, Toyoda M, Chikaraishi Y, Koizumi M, Tokuyama H, Miura H, Yokoyama Y
  • Organizer: oldschmidt Conference
  • Place of Presentation: Cologne
  • Year and Date: 2007-08-22
• [Book] チェンジング・ブルー:気候変動の謎に迫る (2008)
  • Author(s): 大河内直彦
  • Total Pages: 422
  • Publisher: 岩波書店
• [Remarks] ホームページ
  • URL: http://www.jamstec.go.jp/biogeos/j/elhrp/biogeochem/