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Mechanism of the late Miocene global cooling driven by decline of CO2

Research Project

Project/Area Number 26287129
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypePartial Multi-year Fund
Section一般
Research Field Stratigraphy/Paleontology
Research InstitutionHokkaido University

Principal Investigator

Seki Osamu  北海道大学, 低温科学研究所, 准教授 (30374648)

Co-Investigator(Kenkyū-buntansha) 阿部 彩子  東京大学, 大気海洋研究所, 准教授 (30272537)
堀川 恵司  富山大学, 大学院理工学研究部(理学), 准教授 (40467858)
小野寺 丈尚太郎  国立研究開発法人海洋研究開発機構, 海洋生態系動態変動研究グループ, 主任研究員 (50467859)
岡崎 裕典  九州大学, 理学研究院, 准教授 (80426288)
Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2016: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2015: ¥5,460,000 (Direct Cost: ¥4,200,000、Indirect Cost: ¥1,260,000)
Fiscal Year 2014: ¥7,930,000 (Direct Cost: ¥6,100,000、Indirect Cost: ¥1,830,000)
Keywords後期新生代 / 後期中新世 / 古気候 / 古海洋 / 古気候モデル / 全球寒冷化 / 二酸化炭素 / 新第三紀 / 新第三紀後期
Outline of Final Research Achievements

The Earth has undergone a dramatic climate transition from hothouse to icehouse conditions occurred during the past 10 million years. It is important to understand cause of the long-term glaciation for better understanding of long-term stability of ice sheet yet the causes of the climate transition is still uncertain. In this study we reconstructed pale oceanographic changes and pCO2 from marine sediment cores collected from different parts of the ocean. We found that a dramatic global cooling (late Miocene global cooling) and marked decline of CO2 concentration occurred several million years before the intensification of Northern Hemisphere Glaciation (NHG). This suggests that CO2 played a substantial role in the long-tern climate evolution overt the past 10 million years.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Annual Research Report
  • 2014 Annual Research Report

Research Products

(16 results)

All 2016 2015 2014

All Journal Article (1 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 1 results) Presentation (15 results) (of which Int'l Joint Research: 2 results,  Invited: 3 results)

  • [Journal Article] Morphological response of planktic foraminifers to habitat modifications associated with the emergence of the Isthmus of Panama2016

    • Author(s)
      Daniela N. Schmidt, A.G.M. Caromel, Osamu Seki, J.W.B. Rae and S. Renaud
    • Journal Title

      Marine Micropaleontology

      Volume: 128 Pages: 28-38

    • DOI

      10.1016/j.marmicro.2016.08.003

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] Variations in the East Asian Summer Monsoon during the Last 400 kyr Reconstructed Using Oxygen Isotope and Mg/Ca-Derived Sea Surface Temperatures at IODP Site U14292016

    • Author(s)
      Horikawa K, Kawanishi R, Seki O, Okazaki Y & Onodera J
    • Organizer
      Goldschmidt Conference 2016
    • Place of Presentation
      横浜国際会議場(神奈川県横浜市)
    • Year and Date
      2016-07-26
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cooling of deep Southern Ocean in the late Miocene2016

    • Author(s)
      K. HORIKAWA, R. KAWANISHI, O. SEKI, Y. OKAZAKI, J. ONODERA
    • Organizer
      The 26th Goldschmidt Conference
    • Place of Presentation
      パシフィコ横浜(神奈川県横浜市)
    • Year and Date
      2016-06-26
    • Related Report
      2015 Annual Research Report
  • [Presentation] 後期中新世から更新世における南大洋の気候とダスト、生物生産のカップリング2016

    • Author(s)
      関宰
    • Organizer
      2016年日本地球惑星科学連合大会
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Year and Date
      2016-05-22
    • Related Report
      2015 Annual Research Report
  • [Presentation] 珪質微化石群集に基づく過去650万年間の南大西洋ODP704地点の表層水温変動2016

    • Author(s)
      小野寺 丈尚太郎、関 宰
    • Organizer
      2016年日本地球惑星科学連合大会
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Year and Date
      2016-05-22
    • Related Report
      2015 Annual Research Report
  • [Presentation] 新生代後期(過去約1000万年間)の長期的な全球寒冷化における南大洋の役割2016

    • Author(s)
      関宰、堀川恵司、小野寺丈尚太郎、岡崎裕典、阿部彩子
    • Organizer
      2016年日本海洋学会春季大会
    • Place of Presentation
      東京大学(東京都文京区)
    • Year and Date
      2016-03-14
    • Related Report
      2015 Annual Research Report
    • Invited
  • [Presentation] 後期中新世から更新世における南大洋の気候とダスト、生物生産のカップリング2016

    • Author(s)
      関宰
    • Organizer
      日本地球惑星科学連合2016年大会
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Related Report
      2016 Annual Research Report
  • [Presentation] 珪質微化石群集に基づく過去630万年間の南大西洋ODP704地点の表層水温変動2016

    • Author(s)
      小野寺丈尚太郎・関宰・堀川恵司
    • Organizer
      日本地球惑星科学連合2016年大会
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Related Report
      2016 Annual Research Report
  • [Presentation] Evidence for coupling of climate and CO2 during the late Neogene cooling2015

    • Author(s)
      Osamu Seki, Daniela Schmidt, Andreas Mackensen, Kimitaka Kawamura, Richard Pancost
    • Organizer
      The 25th Goldschmidt Conference
    • Place of Presentation
      Prague (Czech Republic)
    • Year and Date
      2015-08-16
    • Related Report
      2015 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 過去1000万年間の南大西洋ODP704地点における珪質鞭毛藻化石と表層水塊変動2015

    • Author(s)
      小野寺 丈尚太郎、関 宰
    • Organizer
      2015年日本地球惑星科学連合大会
    • Place of Presentation
      幕張メッセ(千葉県千葉市)
    • Year and Date
      2015-05-24
    • Related Report
      2015 Annual Research Report
  • [Presentation] 新第三紀後期の北半球寒冷化における高緯度の海洋ゲートウェ イ・フィードバック2015

    • Author(s)
      関宰
    • Organizer
      研究集会「北極における過去の気候・環境変動」
    • Place of Presentation
      国立極地研究所(東京都立川市)
    • Year and Date
      2015-03-25 – 2015-03-26
    • Related Report
      2014 Annual Research Report
  • [Presentation] 鮮新世温暖期の気候状態:熱帯暖水プール水温と大気pCO2 問題2015

    • Author(s)
      関宰
    • Organizer
      古海洋・古気候に関するシンポジウム
    • Place of Presentation
      東京大学大気海洋研究所(千葉県柏市)
    • Year and Date
      2015-01-06 – 2015-01-07
    • Related Report
      2014 Annual Research Report
  • [Presentation] IODP プロポーザル869-Pre太平洋子午面循環と西太平洋ジャイア進化2015

    • Author(s)
      岡崎裕典・山本正伸
    • Organizer
      古海洋・古気候に関するシンポジウム
    • Place of Presentation
      東京大学大気海洋研究所(千葉県柏市)
    • Year and Date
      2015-01-06 – 2015-01-07
    • Related Report
      2014 Annual Research Report
  • [Presentation] Role of Arctic and Antarctic regions in late Neogene climate evolutions2014

    • Author(s)
      Osamu Seki, Jonaotaro Onodera, AkiraOka, Minori Ikehara
    • Organizer
      The Fifth Symposium on Polar Science
    • Place of Presentation
      国立極地研究所(東京都立川市)
    • Year and Date
      2014-12-02 – 2014-12-05
    • Related Report
      2014 Annual Research Report
    • Invited
  • [Presentation] Miocene to Pleistocene change in deepwater circulation in the western North Pacific2014

    • Author(s)
      Yusuke Okazaki
    • Organizer
      Asia Oceania Geosciences Society 11th Annual Meeting
    • Place of Presentation
      ロイトン札幌ホテル(札幌市)
    • Year and Date
      2014-07-28 – 2014-08-01
    • Related Report
      2014 Annual Research Report
  • [Presentation] 中新世以降の北西太平洋深層水塊特性変化:DSDP296サイトより2014

    • Author(s)
      岡崎裕典・山本窓香・河潟俊吾・池原実
    • Organizer
      日本地球惑星科学連合2014年大会
    • Place of Presentation
      パシフィコ横浜(横浜市)
    • Year and Date
      2014-04-28 – 2014-05-02
    • Related Report
      2014 Annual Research Report

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Published: 2014-04-04   Modified: 2018-03-22  

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