Model Analysis of Radar Echo Split Observed in an Artificial Cloud Seeding Experiment

MASAKI Shimada; KIKURO Tomine; KOJI Nishiyama

doi:10.1007/s13351-016-5053-y

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Model Analysis of Radar Echo Split Observed in an Artificial Cloud Seeding Experiment

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Corresponding author: KIKURO Tomine

DOI: 10.1007/s13351-016-5053-y

Abstract

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.
- heavy snowfall,
- artificial cloud seeding,
- numerical experiment

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References (18)

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MASAKI Shimada, KIKURO Tomine, KOJI Nishiyama. 2016: Model Analysis of Radar Echo Split Observed in an Artificial Cloud Seeding Experiment. Journal of Meteorological Research, 30(3): 386-400. DOI: 10.1007/s13351-016-5053-y

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Manuscript History

Received: 30 July 2015

Revised: 05 March 2016

Final form: 27 June 2016

Published online: 05 July 2016

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	KIKURO Tomine, MASAKI Shimada, KENJI Wakimizu, KOJI Nishiyama. 2015: An Example of Canal Formation in a Thick Cloud Induced by Massive Seeding Using Liquid Carbon Dioxide. Journal of Meteorological Research, 29(4): 682-690. DOI: 10.1007/s13351-015-5005-y
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Model Analysis of Radar Echo Split Observed in an Artificial Cloud Seeding Experiment