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Study on the behavior of disturbances in the upper troposphere and the interaction with disturbances on the ground

Research Project

Project/Area Number 19540455
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionThe University of Tokyo

Principal Investigator

IGA Keita  The University of Tokyo, 海洋研究所, 准教授 (60292059)

Co-Investigator(Kenkyū-buntansha) NIINO Hiroshi  東京大学, 海洋研究所, 教授 (90272525)
Project Period (FY) 2007 – 2009
Project Status Completed (Fiscal Year 2009)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2009: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2008: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Keywords圏界面波動 / 中間規模東進波 / シアー流中の中立波動 / 波の相互作用 / 渦の統計理論 / 渦の混合
Research Abstract

We analyzed in detail the behavior of disturbances in the upper troposphere, from the view point of neutral waves in a basic flow with shear. We established the analysis method for such neutral waves, and made clear the features of the waves when weak dissipation is considered. We clarified statistically the distribution of the vortices in the steady state after the disturbances are fully developed. We also investigated the disturbances on the ground developing under the existence of upper disturbances by numerical simulations of a mechanical model, and made clear the kinds of developing disturbances and its mechanism.

Report

(4 results)
  • 2009 Annual Research Report   Final Research Report ( PDF )
  • 2008 Annual Research Report
  • 2007 Annual Research Report
  • Research Products

    (16 results)

All 2010 2009 2008 2007

All Journal Article (2 results) (of which Peer Reviewed: 2 results) Presentation (14 results)

  • [Journal Article] Statistical theory applied to a vortex street generated from meander of a jet2010

    • Author(s)
      Iga K.
    • Journal Title

      Theor.Compt. Fluid Dyn. Vol. 24

      Pages: 283-289

    • Related Report
      2009 Final Research Report
    • Peer Reviewed
  • [Journal Article] Statistical theory applied to a vortex street generated from meander of a jet2010

    • Author(s)
      Iga K.
    • Journal Title

      Theor.Compt.Fluid Dyn. 24

      Pages: 283-289

    • Related Report
      2009 Annual Research Report
    • Peer Reviewed
  • [Presentation] 一様シアー・渦位勾配を持つ流れの中立波2009

    • Author(s)
      伊賀啓太
    • Organizer
      九州大学応用力学研究所研究集会
    • Place of Presentation
      春日
    • Year and Date
      2009-12-22
    • Related Report
      2009 Annual Research Report 2009 Final Research Report
  • [Presentation] シアー流中の中立波-遠方にある波の振る舞い-2009

    • Author(s)
      伊賀啓太
    • Organizer
      日本気象学会2009年秋季大会
    • Place of Presentation
      福岡
    • Year and Date
      2009-11-25
    • Related Report
      2009 Annual Research Report 2009 Final Research Report
  • [Presentation] Statistical theory applied to a vortex street generated from meander of a jet2008

    • Author(s)
      Iga K.
    • Organizer
      IUTAM Symposium "150 Year of Vortex Dynamics"
    • Place of Presentation
      Lyngby (Denmark)
    • Year and Date
      2008-10-15
    • Related Report
      2009 Final Research Report
  • [Presentation] Statistical theory applied to a vortex street generated from meander of a jet2008

    • Author(s)
      Iga K.
    • Organizer
      IUTAM Symposium "150 Year of Vortex Dynamics"
    • Place of Presentation
      Lyngby, Denmark
    • Year and Date
      2008-10-15
    • Related Report
      2008 Annual Research Report
  • [Presentation] メソスケール擾乱発達期における成分波間の非線形相互作用の役割2008

    • Author(s)
      前島康光・伊賀啓太
    • Organizer
      日本地球惑星科学連合2008年大会
    • Place of Presentation
      千葉
    • Year and Date
      2008-05-27
    • Related Report
      2009 Final Research Report 2008 Annual Research Report
  • [Presentation] 前線不安定によるメソスケール擾乱の非線形発展・成分波間の相互作用について2008

    • Author(s)
      前島康光・伊賀啓太
    • Organizer
      日本気象学会2008年春季大会
    • Place of Presentation
      横浜
    • Year and Date
      2008-05-18
    • Related Report
      2009 Final Research Report
  • [Presentation] 前線不安定によるメソスケール擾乱の非線形発展-成分波間の相互作用についで-2008

    • Author(s)
      前島康光・伊賀啓太
    • Organizer
      日本気象学会2008年春季大会
    • Place of Presentation
      横浜
    • Year and Date
      2008-05-18
    • Related Report
      2008 Annual Research Report
  • [Presentation] 前線不安定による大気メソスケール擾乱の非線形発展2008

    • Author(s)
      前島康光・伊賀啓太
    • Organizer
      九州大学応用力学研究所研究集会
    • Place of Presentation
      春日
    • Year and Date
      2008-03-03
    • Related Report
      2009 Final Research Report 2007 Annual Research Report
  • [Presentation] 弱いニュートン冷却を考慮した中間規模東進波2007

    • Author(s)
      伊賀啓太
    • Organizer
      日本気象学会2007年秋季大会
    • Place of Presentation
      札幌
    • Year and Date
      2007-10-15
    • Related Report
      2009 Final Research Report 2007 Annual Research Report
  • [Presentation] The contribution of the instabilities to vortex disturbances along the Convergent Cloud Band2007

    • Author(s)
      Maejima Y., Iga K.
    • Organizer
      International Union of Geodesy and Geophysics XXIV General Assembly
    • Place of Presentation
      Perugia (Italy)
    • Year and Date
      2007-07-12
    • Related Report
      2009 Final Research Report
  • [Presentation] The contribution of the instabilities to vortex disturbances along the Convergent Cloud Band2007

    • Author(s)
      Maejima Y. and Iga K.
    • Organizer
      International Union of Geodesy and Geophysics XXIV General Assembly
    • Place of Presentation
      Perugia, Italy
    • Year and Date
      2007-07-12
    • Related Report
      2007 Annual Research Report
  • [Presentation] 帯状収束雲に伴う渦状擾乱の非線形発展過程について2007

    • Author(s)
      前島康光・伊賀啓太
    • Organizer
      日本地球惑星科学連合2007年大会
    • Place of Presentation
      千葉
    • Year and Date
      2007-05-24
    • Related Report
      2009 Final Research Report 2007 Annual Research Report
  • [Presentation] 帯状収束雲上に見られる渦状擾乱非線形発展-線形安定論における不安定モードとの対応-2007

    • Author(s)
      前島康光・伊賀啓太
    • Organizer
      日本気象学会2007年春季大会
    • Place of Presentation
      東京
    • Year and Date
      2007-05-14
    • Related Report
      2009 Final Research Report
  • [Presentation] 帯状収束雲上に見られる渦状擾乱の非線形発展-線形安定論における不安定モードとの対応-2007

    • Author(s)
      前島 康光・伊賀 啓太
    • Organizer
      日本気象学会2007年春季大会
    • Place of Presentation
      東京
    • Year and Date
      2007-05-14
    • Related Report
      2007 Annual Research Report

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Published: 2007-04-01   Modified: 2016-04-21  

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