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Horizontal transport of sea spray droplets intensifying tropical cyclones

Research Project

Project/Area Number 16K13884
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Meteorology/Physical oceanography/Hydrology
Research InstitutionUniversity of the Ryukyus

Principal Investigator

ITO Kosuke  琉球大学, 理学部, 助教 (10634123)

Research Collaborator TAKAGAKI Naohisa  兵庫県立大学, 工学部, 助教
Project Period (FY) 2016-04-01 – 2018-03-31
Project Status Completed (Fiscal Year 2017)
Budget Amount *help
¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Keywords台風 / 波しぶき / 数値モデル / 急発達
Outline of Final Research Achievements

Conventional models assume that surface evaporation depends on local physical variables. However, sea spray droplets can remain suspended in the air for several minutes before evaporating under humid conditions in a tropical cyclone (TC). Therefore, spray-mediated evaporation could occur about a few kilometers away from the spray genesis location according to a boundary layer inflow toward the TC center. Because the TC intensity depends on the location in which the evaporation occurs, we conducted a numerical simulation with an idealized atmospheric model that can consider both droplet flight duration and evaporation timescale. As expected, the minimum sea level pressure of a violent TC decreased became strong on the order of 10 hPa in a quasi-steady state and intensification rate became large when the transport of sea spray droplets was incorporated.

Report

(3 results)
  • 2017 Annual Research Report   Final Research Report ( PDF )
  • 2016 Research-status Report

Research Products

(11 results)

All 2018 2017 2016

All Journal Article (1 results) (of which Peer Reviewed: 1 results,  Open Access: 1 results) Presentation (10 results) (of which Int'l Joint Research: 5 results,  Invited: 3 results)

  • [Journal Article] 高解像度大気モデル及び大気海洋結合モデルを用いた北西太平洋全域台風予測実験2018

    • Author(s)
      伊藤耕介,沢田雅洋,山口宗彦
    • Journal Title

      気象研究所研究報告

      Volume: -

    • NAID

      130007395804

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Presentation] Sea Spray Transport Intensifying Tropical Cyclones2018

    • Author(s)
      Kosuke Ito, Shota Kanda, Naohisa Takagaki
    • Organizer
      33rd Conference on Hurricanes and Tropical Meteorology
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 波しぶきの移流が促す台風の強化2017

    • Author(s)
      伊藤耕介
    • Organizer
      低気圧と暴風雨に係るワークショップ2017
    • Place of Presentation
      九州大学,福岡県福岡市西区
    • Year and Date
      2017-02-04
    • Related Report
      2016 Research-status Report
  • [Presentation] Tropical cyclone forecasts with a JMA-NHM-based coupled model2017

    • Author(s)
      Kosuke Ito
    • Organizer
      International Science Forum on the South China Sea
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 台風物理学の基礎とその応用としての予測2017

    • Author(s)
      伊藤耕介
    • Organizer
      GFDセミナー
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 台風の予測をするということ2017

    • Author(s)
      伊藤耕介
    • Organizer
      科学基礎論学会
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] Transport of sea spray intensifying tropical cyclones2017

    • Author(s)
      Kosuke Ito, Shota Kanda, Naohisa Takagaki
    • Organizer
      International Conference on Mesoscale Convective Systems and High-Impact Weather in Asia
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Horizontal transport of sea spray droplets intensifying tropical cyclones2017

    • Author(s)
      Kosuke Ito, Shota Kanda, Naohisa Takagaki
    • Organizer
      Asia Oceania Geosciences Society Annual Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Transport of suspended sea spray droplets intensifying tropical cyclones2017

    • Author(s)
      Kosuke Ito, Shota Kanda, Naohisa Takagaki
    • Organizer
      JpGU-AGU joint meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 猛烈な台風の強度に関する「波しぶき水平輸送」仮説2017

    • Author(s)
      伊藤耕介,神田昇汰,高垣直尚
    • Organizer
      日本気象学会春季大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 発達期から成熟期にかけての軸対称的な台風の構造上の特徴2016

    • Author(s)
      伊藤耕介,松尾篤穂
    • Organizer
      日本気象学会秋季大会
    • Place of Presentation
      名古屋大学,愛知県名古屋市千種区
    • Year and Date
      2016-10-28
    • Related Report
      2016 Research-status Report

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Published: 2016-04-21   Modified: 2019-03-29  

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