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Development of new type videosonde system for the study of torrential rain

Research Project

Project/Area Number 05558051
Research Category

Grant-in-Aid for Developmental Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Natural disaster science
Research InstitutionKYUSHU UNIVERSITY

Principal Investigator

TAKAHASHI Tsutomu  KYUSHU UNIVERSITY,FACULTY OF SCIENCE,PROFESSOR, 理学部, 教授 (20197742)

Project Period (FY) 1993 – 1995
Project Status Completed (Fiscal Year 1995)
Budget Amount *help
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1995: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1994: ¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1993: ¥2,800,000 (Direct Cost: ¥2,800,000)
KeywordsCloud Particle Videosonde / Precipitation Mechanism / MCTEX Project / 雲粒子ビデオゾンデ / Hector / 雷活動 / MCTEX国際プロジェクト / 雲粒子 / 降水粒子ビデオゾンデ / 雷 / ビデオゾンデ / 降水機構 / 氷晶 / 集中豪雨
Research Abstract

Whole knowledge of precipitation particle distribution in cloud in the prerequisite to increase our understanding of precipitation mechanisms of torrential rain producing clouds. Two types of videosonde systems were developed. One type aims to measure precipitation particles larger than 500mum in diameter. When precipitation particle interrupts the infra-red light running across the sight of camera, flash is triggered. The images are pictured by videocamera and sent to the ground by 1680 MHz. This videosonde system is also able to monitor both electric charge of precipitation particles, and temperature, humidity and pressure.
The other type of videosonde, cloud particle videosonde measures cloud droplets. The unique feature of this system is to take a picture of cloud particles on the film as it runs. Flash is used to make stational images of cloud droplets. Both videosonde systems were launched during the MCTEX project which was conducted at Melville Is., Australia. This was the first to elucidate the precipitation particles in the Hector clouds. Videosonde observation showed many frozen particles as large as 7 mm in diameter and abundant ice crystals, sometimes reaching to ten per cm^3. Analysis shows the very active ice phase process which may explain the most frequent lightning frequencies.

Report

(4 results)
  • 1995 Annual Research Report   Final Research Report Summary
  • 1994 Annual Research Report
  • 1993 Annual Research Report
  • Research Products

    (7 results)

All Other

All Publications (7 results)

  • [Publications] 高橋劭 他: "Possible High Ice Production during Graupel-Graupel Collisions" Journal of the Atmospheric Sciences. 24. 4523-4527 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 高橋劭 他: "Videosonde Observation of Precipitation Processes in Equatorial Cloud Cluster" Journal of the Metarological Society of Japan (気象集誌). 73. 509-534 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 高橋劭 他: "Precipitation Mechanisms of Cloud Systems developed in Semi-arid Area of Pingliang,China-Videosonde Observation" Journal of the Metarological Society of Japan (気象集誌). 73. 1191-1211 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Takahashi, T., Y.Nagao, and Y.Kushiyama: "Possible High Ice Production during Graupel-Graupel Collisions" Journal of the Atmospheric Sciences. 24. 4523-4527 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Takahashi, T., et.al.: "Videosonde Observation of Precipitation Processes in Equatorial Cloud Cluster" Journal of the Meteorological Society of Japan. 73. 509-534 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] Takahashi, T., et.al.: "Precipitation Mechanisms of Cloud Systems developed in Semi-arid Area of Pingliang, China-Videosonde Observation" Journal of the Meteorological Society of Japan. 73. 1191-1211 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1995 Final Research Report Summary
  • [Publications] 鈴木賢士他: "雲粒子ビデオゾンデの試作" 日本気象学会1995年度秋季大会講演予稿集. 266 (1995)

    • Related Report
      1995 Annual Research Report

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Published: 1993-04-01   Modified: 2016-04-21  

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