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http://dx.doi.org/10.7780/kjrs.2018.34.3.3

Sounding Observation with Wind Profiler and Radiometer of the Yeongdong Thundersnow on 20 January 2017  

Kwon, Ju-Hyeong (Department of Atmospheric and Environmental Sciences, Gangneung-Wonju National University)
Kwon, Tae-Yong (Department of Atmospheric and Environmental Sciences, Gangneung-Wonju National University)
Kim, Byung-Gon (Department of Atmospheric and Environmental Sciences, Gangneung-Wonju National University)
Publication Information
Korean Journal of Remote Sensing / v.34, no.3, 2018 , pp. 465-480 More about this Journal
Abstract
On 20 January 2017, the fresh snow cover which is more than 20 cm, accompaning with lightning occurred over Yeongdong coastal region for the first 3-hour of the heavy snowfall event. This study analyzed sounding observations in the heavy snow period which were including the measurements of wind profiler, radiometer and rawinsonde. The features examined from the vertical wind and temperature data at the two adjacent stations, Bukgangneung and Gangneung-Wonju National University, are summarized as follows: 1) The strong (30-40 kts) north-east winds were observed in the level from 2 to 6 km. The Strong atmospheric instability was found from 4 to 6 km, in which the lapse rate of temperature was about $-18^{\circ}C\;km^{-1}$. These features indicate that the deep convective cloud develops up to the height of 6 km in the heavy snowfall period, which is shown in the satellite infrared images. 2) The cooling was observed in the level below 1 km. At this time, the surface air temperature at Bukgangneung station decreased by $4^{\circ}C$. The narrow cooling zone estimated from AWS and buoy data was located in east-west direction. These are the features observed in the cold front of extratropical cyclone. The distributions of radar echo and lightning also show the same shape in east-west direction. Therefore, the results indicate that the Yeongdong thundersnow event was the combined precipitation system of deep convective cloud and cold frontal precipitation.
Keywords
Remote sensing Sounding observation; Wind Profiler; Radiometer; Rawinsonde; Yeongdong thundersnow;
Citations & Related Records
Times Cited By KSCI : 8  (Citation Analysis)
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