Relationships among Rainfall Distribution, Surface Wind, and Precipitable Water Vapor during Heavy Rainfall in Central Tokyo in Summer

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Abstract

<p> The relationships between the occurrence of intense rainfall and the convergence of surface winds and water vapor concentration for typical heavy-rainfall cases were examined using data from July to August in 2011-2013, obtained from high-density meteorological observations in Tokyo, Japan. Additionally, the temporal variations in wind convergence and water vapor between days with and without heavy rainfall events were compared. Corresponding to heavy-rainfall areas, the convergence of surface winds tended to increase for several tens of minutes prior to the heavy rainfall. The peak of convergence was observed 10-30 min before the heavy-rainfall occurrence, and convergence continued to increase for approximately 30 min until the convergence peak time. Around the heavy-rainfall area, the increase in the water vapor concentration index coincided with the increase in convergence. From these results, by monitoring the temporal variations and distributions of these parameters using a high-density observation network, it should be possible to predict the occurrence of heavy rainfall rapidly and accurately.</p>

Journal

  • Journal of the Meteorological Society of Japan. Ser. II

    Journal of the Meteorological Society of Japan. Ser. II 96A(0), 35-49, 2018

    Meteorological Society of Japan

Codes

  • NII Article ID (NAID)
    130006379209
  • NII NACSIS-CAT ID (NCID)
    AA00702524
  • Text Lang
    ENG
  • ISSN
    0026-1165
  • NDL Article ID
    029008711
  • NDL Call No.
    Z54-J645
  • Data Source
    NDL  J-STAGE 
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