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2010 Fiscal Year Final Research Report

Surface pollen investigation in the warm-temperate to subtropical regions of Japan : an attempt for quantitative palaeoclimate reconstruction on Quaternary interglacials

Research Project

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Project/Area Number 19684018
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Stratigraphy/Paleontology
Research InstitutionNatural History Museum and Institute, Chiba

Principal Investigator

OKUDA Masaaki  Natural History Museum and Institute, Chiba, 生態環境研究部, 上席研究員 (10311383)

Co-Investigator(Renkei-kenkyūsha) TAKEMURA Keiji  千葉県立中央博物館 (00201608)
Project Period (FY) 2007 – 2010
Keywords表層花粉 / モダンアナログ法 / 日本列島 / 第四紀 / 暖温帯 / 亜熱帯 / 温暖化
Research Abstract

The pollen-based modern analogue technique (MAT) can provide constraints for climate projections for the next decades (IPCC, etc) by reconstructing quantitative palaeotemperature of human habitation areas during the late Quaternary. However, a so-called fade-out problem of reconstructed temperature in >16℃ regime has prevented the MAT from providing analogues for the >2℃ warmer world than present. To reduce this problem, we perform surface pollen investigation for warm-temperate to subtropical regions of Japan, of which annual mean temperature exceeds 16℃.
In geographical context, southern Kii peninsula, SW Shikoku, Kyusyu and islands of Tanega-shima, Amami-Oshima, Okinawa, Hachijo-jima, etc are selected for hot region up to 23℃. The collected samples (surface pollen materials composed of living moss polster) are analyzed in the standard palynological procedure to fill the gaps in the >16℃ regime of Japan. Results provide a complete temperature curve without lack in extreme temperature … More zones (5-7℃ warmer than the present in the Kinki-Kanto districts).
In palynological context, almost all the lower warm-temperate to subtropical zones, located to the south of Shikoku, are dominated by abundant Castanopsis pollen. High values of evergreen oak (Cyclobalanopsis) are restricted in the upper warm-temperate zone (<16℃ in annual mean temperature). In addition, an attempt of palaeoclimate reconstruction using previous surface pollen is also performed on the fossil pollen record from Lake Biwa. These results have been summarized into two English manuscripts for international journals (Okuda et al., Tarasov et al.).
We note that this project also deal with the surface pollen investigation for ocean floors around the Japanese archipelago. The NW Pacific has had a lot of ocean coring points. Since the cored materials from the marine realm are preserved in JAMSTEC, San-So-Ken, etc, sabsampling and analyzing muddy sediments from the core tops can provide surface pollen dataset beneath the ocean, which is in the same manner as those in terrestrial regions.
Unfortunately, surface pollen samples themselves cannot be collected in current urban areas around e.g. the Tokyo Bay. To reduce this problem, we performed a borehole core project in central Chiba city. Results show that fossil pollen of 1500-2500 yr BP age, with little vegetation disturbance by early humans, can serve as a substitute for modern surface pollen. Less

  • Research Products

    (16 results)

All 2011 2010 2009 2008 2007 Other

All Journal Article (6 results) Presentation (7 results) Book (1 results) Remarks (2 results)

  • [Journal Article] 千葉市中央区都川流域(旧池田郷)における過去4千年間の花粉組成と古環境2011

    • Author(s)
      奥田昌明, ほか
    • Journal Title

      中博自報 11(2)

      Pages: 31-45

  • [Journal Article] 花粉による琵琶湖など長期スケールの湖沼堆積物からの古気候復元の現状と課題2010

    • Author(s)
      奥田昌明, ほか
    • Journal Title

      第四紀研究 49(3)

      Pages: 133-146

  • [Journal Article] 琵琶湖の堆積物を用いたモンスーン変動の復元-ミランコビッチ=クズバッハ仮説の矛盾と克服-2009

    • Author(s)
      中川毅・奥田昌明, ほか
    • Journal Title

      第四紀研究 48(3)

      Pages: 207-225

  • [Journal Article] 千葉市中央区道場南の地下地質環境について2009

    • Author(s)
      木村和也・奥田昌明, ほか
    • Journal Title

      Proceedings of the 19th Symposium on Geo-Environments and Geo-Techinics

      Pages: 7-12

  • [Journal Article] Regulation of the monsoon climate by two different orbital rhythms and forcing mechanisms.2008

    • Author(s)
      Nakagawa, Okuda, et al.
    • Journal Title

      Geology 36(6)

      Pages: 491-494

  • [Journal Article] Surface pollen data addition for the warm-temperate zone of Japan.2007

    • Author(s)
      Okuda, et al.
    • Journal Title

      The Quaternary Research 46(3)

      Pages: 241-248

  • [Presentation] オホーツク海底表層堆積物における花粉化石群集の平面分布2011

    • Author(s)
      菅谷真奈美・奥田昌明, ほか
    • Organizer
      2011年日本地球惑星科学連合大会
    • Place of Presentation
      幕張メッセ国際会議場
    • Year and Date
      2011-05-25
  • [Presentation] 琵琶湖における過去15万年間の花粉組成と古環境変動2011

    • Author(s)
      奥田昌明, ほか
    • Organizer
      平成22年度琵琶湖科研堆積物等分析研究集会
    • Place of Presentation
      京都大学理学研究科1号館
    • Year and Date
      2011-01-08
  • [Presentation] 花粉分析の意義と役割-古気候復元から探る地球環境変動-2010

    • Author(s)
      奥田昌明, ほか
    • Organizer
      日本花粉学会第51回大会アウトリーチ
    • Place of Presentation
      中央大学後楽園キャンパス
    • Year and Date
      2010-10-10
  • [Presentation] 千葉市中央区道場南からのボーリングコア(Tb)上部3.85mの花粉分析結果2009

    • Author(s)
      奥田昌明
    • Organizer
      千葉市シンポジウム「更級日記と池田の池」
    • Place of Presentation
      千葉県立中央博物館講堂
    • Year and Date
      2009-12-12
  • [Presentation] 花粉による琵琶湖堆積物からの古気候復元の現状と課題2009

    • Author(s)
      奥田昌明, ほか
    • Organizer
      2009日本第四紀学会大会シンポジウム「古環境変動へ貢献する湖沼堆積物研究の役割」
    • Place of Presentation
      琵琶湖博物館ホール
    • Year and Date
      2009-08-30
  • [Presentation] 海洋底の表層花粉調査-日本列島周辺海域の花粉群の空間分布について-

    • Author(s)
      奥田昌明, ほか
    • Organizer
      地球惑星科学連合2008年大会
  • [Presentation] 万年周期のアジアモンスーン変動のメカニズム理解の把握

    • Author(s)
      奥田昌明, ほか
    • Organizer
      日本第四紀学会古気候変動研究会2008研究集会
  • [Book] In古生物学事典第2版(日本古生物学会編)2010

    • Author(s)
      奥田昌明, 上総層群
    • Total Pages
      77
    • Publisher
      朝倉書店
  • [Remarks] 受賞歴:2007年日本第四紀学会論文賞奥田昌明ほか(2006)下総層群清川層堆積期間(MIS7)の古気候状態-花粉ほか代理指標からの考察-

  • [Remarks] 受賞者の言葉:奥田昌明ほか(2007)第四紀通信14(5),3-4に掲載。

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Published: 2012-02-13   Modified: 2016-04-21  

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