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A high-resolution analysis of environmental changes during the last thousands years deduced from the cored sediments in Lake Kizaki, central Japan

Research Project

Project/Area Number 10640436
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geology
Research InstitutionShinshu University

Principal Investigator

KUMON Fujio  Faculty of Sciences, Shinshu University, Professor, 理学部, 教授 (60161717)

Co-Investigator(Kenkyū-buntansha) FUKUSHIMA Kazui  Faculty of Sciences, Shinshu University, Professor, 理学部, 教授 (20106602)
HAYASHI Hidetake  Faculty of Sciences, Shinshu University, Professor, 理学部, 教授 (60087129)
Project Period (FY) 1998 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥3,000,000 (Direct Cost: ¥3,000,000)
KeywordsLake Kizaki / lacustrine deposit / climatic change / organic carbon / eolian dust / turbidite / flood sediment / Medieval Warm Period / メケレス型ピストンコアラー / 有機炭素量 / 硫黄含有量 / 風成塵量 / 環境変遷
Research Abstract

The surface cores of 2 to 3 m long were taken from the major basin floor at three sites of Lake Kizaki, using a new mechereth-type piston corer. Three ィイD114ィエD1C datings revealed that the cored sediments cover about 1500 to 1800 years before present. The sedimentation rate ranges from 1.3 to 1.9 mm/year (52 to 62 mg/cmィイD12ィエD1/year), and is lager than that estimated before this study. This high ratio is due to many turbidite layers which are estimated to be caused by large floods. The turbidite layers are characterized by the features such as relative high-density, low C and N contents and high C/N ratio. Major turbidite layers are enable to be correlated each other, suggesting large turbidity flows of basin scale. C/N ratio ranges from 10 to 13, suggesting that most organic materials are plankton of lake origin with minor amount of land plant materials. C and N contents fluctuate in short and long terms. The sort-term fluctuation is caused by turbidite dilution, and long-term fluctuation seems to be due to climatic changes. The warm period of the early Medieval Age and cool period of late Medieval Age (the Little ice Age) are identified in the proxy curve. Organic C and N contents of lake sediments are confirmed to be a good indicator of past climate.

Report

(3 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 多里英、公文富士夫、小林舞子、酒井潤一: "長野県北西部、青木湖の成因と周辺の最上部第四紀層"第四紀研究. 39. 1-13 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 公文 富士夫: "湖底堆積物中の地震や洪水の記録―湖成タービダイト―"月刊地球. 36,no.2. 156-161 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kumon,F. Ohno,R., Sakai,T. and Sakai,J.,: "Climatic records during the last 40,000 years in Lake Nojiri, central Japan"Mikami,T.(ed.), Proceedings of the International Conference on the Climatic Change and Variability-Past,Present and Future -.Intern.Geographical.Union,Comm.Climatology. 41-44 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kumon,F.: "Paleolimnological Studies"Saijo,Y. & Hayashi,H.(eds.),Lake Kizaki,Blackwell Sci.Pty.Ltd.. (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Saijo,Y. & Hayashi,H.(eds.),: "Lake Kizaki"Blackwell Science Pty.Ltd.. (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Ono, R., Kumon, F., Kobayashi, M. and Sakai, J.: "Late quaternary sediments around Lake Aoki, Nagano, central Japan and the origin of the lake."The Quaternary Research. vol. 39. 1-13 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kumon, F.: "The records of earthquakes and floods in lake sediments - lacustrine turbidites -. Monthly Earth"vol. 22, no. 3. 156-161 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kumon, F.0 Ohno, R., Sakai, T. and Sakai, J.: "Climatic records during the last 40,000 years in Lake Nojiri, central Japan."Mikami, T.(ed.), Proceedings of the International Conference on the Climatic Change and Variability - Past, Present and Future -. Intern, Geographical Union, Comm. Climatology. 41-44 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Kumon, F.: "Paleolimnological Studies."In Saijo, Y. & Hayashi, H.(eds.) Lake Kizaki, Blackwell Sci. Pty. Ltd.. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Saijo, Y. & Hayashi, H.(eds.): "Lake Kizaki"Blackwell Sci. Pty. Ltd.. (in press).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 多里英、公文富士夫、小林舞子、酒井潤一: "長野県北西部、青木湖の成因と周辺の最上部第四紀層"第四紀研究. 39. 1-13 (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Kumon, F.: "Saijo, Y. &Hayashi, H.(des.), Lake Kizaki, Blackwell Sci. Pty. Ltd."Paleolimonological Studies. 2000

    • Related Report
      1999 Annual Research Report
  • [Publications] Saijo, Y. & Hayashi, H. (des.),: "Blackwell Science Pty. Ltd"Lake Kizaki. 2000

    • Related Report
      1999 Annual Research Report

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Published: 1998-04-01   Modified: 2016-04-21  

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