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Doppler lidar observation of wind profile under cumulus convection for establishing a state-of-the-art wind hazard

Research Project

Project/Area Number 18H03805
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 23:Architecture, building engineering, and related fields
Research InstitutionKyoto University

Principal Investigator

MARUYAMA TAKASHI  京都大学, 防災研究所, 教授 (00190570)

Co-Investigator(Kenkyū-buntansha) 竹見 哲也  京都大学, 防災研究所, 准教授 (10314361)
山田 広幸  琉球大学, 理学部, 准教授 (30421879)
山口 弘誠  京都大学, 防災研究所, 准教授 (90551383)
Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥46,540,000 (Direct Cost: ¥35,800,000、Indirect Cost: ¥10,740,000)
Fiscal Year 2020: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2019: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2018: ¥38,090,000 (Direct Cost: ¥29,300,000、Indirect Cost: ¥8,790,000)
Keywordsドップラーライダー / 立体的フィールド観測 / 強風ハザード / 積雲対流 / 突風 / 境界層 / レーダー観測 / 強風被害 / 接地境界層 / 建物強風被害 / 観測 / ハザード / 変動風速場 / 強風被害ハザード / 風速変動
Outline of Final Research Achievements

Field observation of wind profile near the ground has been carried out by using a doppler lidar and meteorological radars. Characteristics of fluctuational wind under cumulus convection and the growth of boundary layer including not only the effect of ground friction caused by surface roughness but also the effect of gust caused by up/down draft was examined and clarified. The calculation method was constructed to simulate and to predict the flow fields in the boundary layer under cumulus convection. The boundary condition was downscaling from meteorological model WRF. The surface roughness was obtained from GIS and evaluated by the canopy model. The transport equation of temperature and the cloud-resolving model was used resulting that the up/down draft was generated under the cumulus convection. The parameter study on the fluctuational wind has been carried out and obtained the characteristics of the wind flow contributing to establishing a state-of-the-art wind hazard.

Academic Significance and Societal Importance of the Research Achievements

建物被害の原因となる強風特性に関して、これまで地表面摩擦に起因する「風の乱れ」だけが考慮されてきたが、ダウンバーストや竜巻、ガストフロントなど局所的ではあるが激甚な建物被害を引き起こす極端気象現象が明らかになるにつれ、これら積雲対流下の上昇・下降気流に由来する風速の急変を伴う「突風」を考慮した「新たな強風ハザード」が求められている。本研究は、地表面摩擦による「風の乱れ」だけでなく、積雲対流による「突風」の影響を予測・評価できる変動風速場の解析手法を構築し、これにより、最大瞬間風速も評価できる「新たな強風ハザード」の提案に資するデータを得、強風建物被害の低減に貢献するものである。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (7 results)

All 2021 2020

All Journal Article (4 results) (of which Open Access: 3 results,  Peer Reviewed: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Journal Article] 前線通過時のドップラーライダーによる強風観測2021

    • Author(s)
      丸山 敬・竹見哲也・山田広幸・山口弘誠
    • Journal Title

      京都大学防災研究所年報

      Volume: 64B

    • NAID

      120007192899

    • Related Report
      2020 Annual Research Report
    • Open Access
  • [Journal Article] ドップラーライダーによる前線通過時の強風観測2021

    • Author(s)
      丸山 敬・竹見哲也・山田広幸・山口弘誠
    • Journal Title

      日本風工学会誌

      Volume: 46

    • NAID

      130008052762

    • Related Report
      2020 Annual Research Report
  • [Journal Article] Utilization of High-Resolution Boundary Layer Radar and Wavelet to Detect Microscale Downdraft-Updraft Combination2021

    • Author(s)
      Ginaldi Ari Nugroho, Kosei Yamaguchi, Eiichi Nakakita, Masayuki K. Yamamoto, and Seiji Kawamura
    • Journal Title

      SOLA

      Volume: 17 Issue: 0 Pages: 63-68

    • DOI

      10.2151/sola.2021-010

    • NAID

      130008024423

    • ISSN
      1349-6476
    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 都市気象LESモデルを用いた豪雨の種となる熱的上昇流と渦管の組織化の解明2020

    • Author(s)
      山口弘誠, 千賀幹太, 中北英一
    • Journal Title

      京都大学防災研究所年報

      Volume: 63B Pages: 190-204

    • NAID

      120006950386

    • Related Report
      2020 Annual Research Report
    • Open Access
  • [Presentation] Collaboration of CPM, LES, and observation in high-resolution2020

    • Author(s)
      Kosei Yamaguchi
    • Organizer
      International Workshop on Convection-Permitting Modeling for Climate Research
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 都市気象LESモデルを用いた豪雨の種となる熱的上昇流と渦管の組織化の解明2020

    • Author(s)
      千賀幹太, 山口弘誠, 中北英一
    • Organizer
      令和2年度土木学会全国大会 第75回年次学術講演会
    • Related Report
      2020 Annual Research Report
  • [Presentation] ドップラーライダーで観測された寒冷前線に先行する気流構造の変動2020

    • Author(s)
      川中子ひかる,山田広幸
    • Organizer
      気象学会沖縄支部 研究発表会
    • Related Report
      2020 Annual Research Report

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Published: 2018-04-23   Modified: 2022-01-27  

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