Precipitation Characteristics Measured by Micro Rain Radar and PARSIVEL disdrometer

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Monday, 18 January 2010: 2:15 PM
B302 (GWCC)
Joo-Wan Cha, National Institute Meteorological Research/KMA, Seoul, South Korea; and K. H. Chang, Y. J. Choi, J. Y. Jeong, H. Y. Yang, and J. W. Jung

The objective of this study is to understand the vertical precipitation structure by using the vertical radar (MRR, Micro Rain Radar, OTT Inc.) and disdrometer (PARSIVEL, PARticle SIze and VELocity, METEK Inc.) set, established in the coastal and mountainous regions of South Korea. The observational factors measured by both instruments are precipitation drop size distribution (DSD), rain rate, and liquid water content. The MRR's DSD at its lowest level shows good agreement with that of PARSIVEL. We retrieve the vertical rain rate and liquid water content from MRR under melting layer, calculated by Cha et al's method, in Daegwallyeong (3741' N,12845' E, 843 m ASL, mountain area) and Haenam (3433' N,12634' E, 4.6 m ASL, coast area). The vertical variations of rain rate and liquid water content in Daegwallyeong are smaller than those in Haenam. We think that this different vertical rain rate characteristic for both sites is due to the vertical different cloud type (convective and stratiform cloud seem dominant at Haenam and Daegwallyeong, respectively). This suggests that the statistical precipitation DSD model, for the application of weather radar and numerical simulation of precipitation processes, be considered differently for the region.