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Characteristics of Snowfall Event with Radar Analyses over Honam District and Gwangju Occurred by Cloud Streets over Yellow Sea for 04 Jan. 2003

서해상에 발생하는 Cloud Streets에 동반된 2003년 1월 4일 강설의 레이더관측사례 분석

  • Received : 2009.08.12
  • Accepted : 2010.10.04
  • Published : 2010.10.31

Abstract

The formation and development conditions of the cloud streets over the yellow sea by the Cold Surge of Siberian Anticyclone Expansion which produce the heavy snowfall events over the southwestern coast, Honam District of the Korean peninsula, has been investigated through analyses of the three dimensional snow cloud structures by using the CAPPI, RHI, VAD and VVP data of X-band Radar at Muan Weather Observatory and S-band Radar at Jindo Weather Station. The data to be used are obtained from January 04, 2003, when heavy snow storm hits on Gwangju and Honam District. The PPI Radar images show that the cloud bands distribute in perpendicular to the expansion direction of the high pressure and that the radius of cloud cells is about 5~8 km with 20~30 dBz and distance between each cell is about 10 km. And but the vertical Radar images show that the cloud street is a small scale convective type cloud within height of about 3 km where a stable layer exists. From the VVP images, the time period of the high pressure expansion, the moving direction and development stages of the system are delineated. Finally, the vertical distribution of wind direction is fairly constants, while the wind speed sheer increases with altitude to 3 km.

Keywords

cP;Cloud Street;X-band Radar;S-band Radar;PPI;CAPPI;RHI;VAD and VVP

Acknowledgement

Supported by : 조선대학교

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