High-resolution study of the mid-depth water circulation in the Northwest Pacific during the last deglaciation.

2008 Fiscal Year Final Research Report

• Project/Area Number: 18540459
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Stratigraphy/Paleontology
• Research Institution: Hokkaido University
• Principal Investigator: 阿波根 直一 Hokkaido University, 大学院・理学研究院, 准教授 (30359161)
• Co-Investigator(Kenkyū-buntansha): 木元 克典 海洋研究開発機構, 研究員 (40359162)
• Project Period (FY): 2006 – 2008
• Keywords: 古海洋 / 古気候 / 微化石 / 北太平洋中層水

Research Abstract

青森県下北半島沖ならびに北海道知床半島沖より採取した深海堆積物を用いて, 最終氷期以降の北西太平洋/オホーツク海の中深層循環の変遷について高時間分解能で解析した.その結果, 研究海域において最終氷期から退氷期にかけて急激に中深層循環が変化した証拠が確認された.そのタイミングはグリーンランド氷床コアに認められる気候イベントと一致し, 北半球規模の大気モードの変化を通じて北太平洋中層水の再編が生じた事を示唆している.

Research Products

• [Journal Article] Molecular evidence for an independent origin of modern triserial planktonic foraminifera from benthic ancestors (2008)
  • Author(s): Y. Ujiie, K. Kimoto, and J. Pawlowski
  • Journal Title: Marine Micropaleontology 69 Pages: 334-340
  • Peer Reviewed
• [Journal Article] Radiocarbon-based carbon source quantification of anomalous isotopic foraminifera in last glacial sediments in the western North Pacific Q04N14, doi : 10.1029/2006GC001558 (2008)
  • Author(s): M. Uchida, K. Ohkushi, K. Kimoto, F. Inagaki, T. Ishimura, U.Tsunogai, T. Tuzino, and Y. Shibata
  • Journal Title: Geochem. Geophys. Geosys 9
  • Peer Reviewed
• [Journal Article] Interlaboratory comparison study of calibration standards for foraminiferal Mg/Ca thermometry 20080.Q08010, doi : 10.1029/2008GC001974 (2008)
  • Author(s): M. Graves, et.al., (incl. K. Kimoto)
  • Journal Title: Geochem. Geophys. Geosys 9
  • Peer Reviewed
• [Journal Article] Establishment of the western Pacific warm pool during the Pliocene : evidence from planktonic foraminifera, oxygen isotopes and Mg/Ca ratios (2008)
  • Author(s): K. Sato, M. Oda, S. Chiyonobu, K. Kimoto, H. Domitsu, J. Ingle
  • Journal Title: Paleogeog. Paleoclimatol. Paleoecol 256 Pages: 140-147
  • Peer Reviewed
• [Journal Article] 最終退氷期における北西太平洋中深層水循環変動と大気CO2 変動 (2008)
  • Author(s): 内田昌男, 阿波根直一, 大串健一
  • Journal Title: 月刊地球 345 Pages: 159-170
• [Journal Article] 底生有孔虫骨格の微量元素による最終氷期以降の北西太平洋の変遷-下北半島沖MR01-K03 PC4コアの例- (2008)
  • Author(s): 木元克典, 阿波根直一, 大串健一, 内田昌男
  • Journal Title: 月刊地球 345 Pages: 182-188
• [Journal Article] Eccentricity cycles shown by early Pleistocene planktonic foraminifers of the Omma Formation (2007)
  • Author(s): A. Kitamura and K. Kimoto
  • Journal Title: Sea of Japan, Global and Planetary Changes 55 Pages: 273-283
  • Peer Reviewed
• [Journal Article] Foraminiferal oxygen and carbon isotopesduring the last 34 kyr off northern Japan, northwestern Pacific (2006)
  • Author(s): M. Hoshiba, N. Ahagon, K. Ohkushi, M. Uchida, I. Motoyama, A. Nishimura
  • Journal Title: Marine Micropaleontology 61 Pages: 196-208
  • Peer Reviewed
• [Journal Article] Rapid fluctuation of alkenone temperature in the southwestern Okhotsk Sea during the past 120 kyr (2006)
  • Author(s): N. Harada, N. Ahagon, T. Sakamoto, M. Uchida, M. Ikehara, Y. Shibata
  • Journal Title: Global and Planetary Changes 53 Pages: 29-46
  • Peer Reviewed
• [Presentation] MR06-04 航海で得られたオホーツク海のピストンコア試料の安定酸素同位体比層序と試料前処理法の確立 (2009)
  • Author(s): 木元克典・中村由里子・原田尚美・岡崎裕典・長島佳菜
  • Organizer: BE シンポジウム(JAMSTEC)
  • Place of Presentation: 立教大学
  • Year and Date: 2009-03-12
• [Presentation] 下北半島沖海底コア(MR04-06 PC-3)からみた過去3万年間の古海洋環境 (2009)
  • Author(s): 佐藤瑛子, 菅沼香織, 西弘嗣, 阿波根直一
  • Organizer: 古海洋学シンポジウム
  • Place of Presentation: 東京大学海洋研究所
  • Year and Date: 2009-01-08
• [Presentation] 浮遊性有孔虫骨格のMg/Ca 比を用いた北西太平洋の高精度古環境復元に向けて (2008)
  • Author(s): 木元克典
  • Organizer: 日本古生物学会
  • Place of Presentation: 東北大学
  • Year and Date: 2008-07-04
• [Presentation] 深層水温復元のための底生有孔虫によるMg/Ca キャリブレーション (2008)
  • Author(s): 木元克典・長谷川四郎・池原研
  • Organizer: 地球惑星科学連合大会2008
  • Place of Presentation: 幕張メッセ
  • Year and Date: 2008-05-25
• [Presentation] 過去2万年間における底生有孔虫Mg/Ca による北西太平洋の中層水温度復元 (2008)
  • Author(s): 木元克典・内田昌男・大串健一・阿波根直一・長谷川四郎・池原研
  • Organizer: BE シンポジウム(JAMSTEC)
  • Place of Presentation: 横浜市立大
  • Year and Date: 2008-03-13
• [Presentation] 北西太平洋の底層水温の推定にむけた底生有孔虫のMg/Caキャリブレーション : Uvigerina akitaensis Asano の例 (2008)
  • Author(s): 木元克典・長谷川四郎・池原研
  • Organizer: MRC 微化石研究集会
  • Place of Presentation: 北海道大学
  • Year and Date: 2008-03-04
• [Presentation] 下北半島沖における過去3万年間の底生有孔虫化石群集変動 (2007)
  • Author(s): 菅沼香織・佐藤瑛子・阿波根直一・西弘嗣
  • Organizer: 日本地質学会第114年学術大会
  • Place of Presentation: 北海道大学
  • Year and Date: 2007-09-11
• [Presentation] Living triserial planktonic foraminifera Gallitellia vivans (Cushman) : Ecology, stable isotopes and phylogeny (2007)
  • Author(s): K. Kimoto, T. Ishimura, U. Tsunogai, Y.Ujiie, T. Itaki, J. Pawlowski
  • Organizer: 9^<th> International Conference on Paleoceanography
  • Place of Presentation: Shanghai
  • Year and Date: 2007-09-06
• [Presentation] Development of the western Pacific warm pool during the Pliocene based on planktonic foraminiferal faunal, Mg/Ca, and oxygen isotope records (2007)
  • Author(s): K. Sato, M. Oda, S. Chiyonobu, K. Kimoto
  • Organizer: 9^<th> International Conference on Paleoceanography
  • Place of Presentation: Shanghai
  • Year and Date: 2007-09-06
• [Presentation] Comparison of Mg/Ca calibration equations in planktonic foraminifera between the Pacific and Atlantic Oceans (2007)
  • Author(s): S. Murakami, K. Kimoto, M. Oda, T. Yamada
  • Organizer: 9^<th> International Conference on Paleoceanography
  • Place of Presentation: Shanghai
  • Year and Date: 2007-09-06
• [Presentation] 飼育された浮遊有孔虫オーブリナ・ユニバーサのMg/Ca : LA-ICPMS の結果 (2007)
  • Author(s): 木元克典・A. Y. Sadekov・S. Eggins・P. De Deckker
  • Organizer: シンポジウム「バイオミネラリゼーションと石灰化」
  • Place of Presentation: 東京大学海洋研究所
  • Year and Date: 2007-06-21
• [Presentation] 浮遊性有孔虫のかたち (2007)
  • Author(s): 木元克典
  • Organizer: 形の科学会
  • Place of Presentation: 東京理科大学
  • Year and Date: 2007-06-15
• [Presentation] Fluctuations in alkenone-derived sea surface temperature, productivity, and ventilationin the Magellan Strait, Chilean continentalmargin, over the past 12 kyr (2007)
  • Author(s): N. Harada, M. Uchida, Y. Shibata , N. Ahagon, W. Miyashita, C.B.Lange, S. Pantoja
  • Organizer: European Geosciences Union
  • Place of Presentation: Vienna
  • Year and Date: 2007-04-17