Journal of Meteorological Research

, Volume 30, Issue 3, pp 386–400 | Cite as

Model analysis of radar echo split observed in an artificial cloud seeding experiment

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Abstract

An artificial cloud seeding experiment was performed over the Japan Sea in winter to show how massive seeding could be effective to mitigate heavy snowfall damage. The results showed that 20 min after cloud seeding, a portion of the radar echo beneath the seeding track was weakened to divide the radar echo into two parts. In order to analyze the results, a numerical simulation was conducted by using the Weather Research and Forecasting model verion 3.5.1. In this simulation, the seeding effects were represented as phenomena capable of changing rain particles by accreting cloud ice and snow to form graupel particles and by changing cloud liquid water to snow particles. The graupel particles fell rapidly, thus temporarily intensifying the rainfall, which subsequently decreased. Therefore, the weakened radar echo in the field experiment is deemed to have been caused by the increase in rapidly falling graupel particles.

Key words

heavy snowfall artificial cloud seeding numerical experiment 

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Copyright information

© The Chinese Meteorological Society and Springer-Verlag Berlin Heidelberg 2016

Authors and Affiliations

  1. 1.Department of Earth and Ocean SciencesNational Defense AcademyYokosukaJapan
  2. 2.Faculty of EngineeringKyushu UniversityMotooka, Nishiku, FukuokaJapan

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