A121-0009
Investigation of 3D structure and physical property for convective storm in Korean Peninsula based on radar-satellite simultaneous observation data

Friday, 11 December 2020
Poster
Choeng-lyong Lee, Kyungpook National University, Daegu, Korea, Republic of (South), Geunsu Lyu, Kyungpook National. Univ, Daegu, South Korea, Geunhyeok Ryu, National Meteorological Satellite Center, Korea Meteorological Administration, Chungcheongbukdo, South Korea and Gyuwon Lee, Kyungpook National University, Department of Astronomy and Atmospheric Sciences, Daegu, South Korea
Abstract:
Convective and stratiform precipitations are known to differ substantially in terms of rainfall intensity, internal structure and growth process. Particularly, research of convective characteristic is required to improve the understanding of severe storm occurring frequently during warm season in Korean Peninsula. These systems can be detected using meteorological satellites (geostationary orbit) and ground radar composites in real time. Both observation datasets have high spatiotemporal resolutions so that it is suitable to analysis the evolution of convective regions. In this study, we study the 3 dimensions structure, evolution characteristics for convective cells using dense datasets of simultaneous remoting sensor.

Areas of convective are classified using classification procedure of precipitation types based on modified storm labeling in three dimensions (SL3D). After that, statistical investigations based on vertical profiles and contoured frequency by altitude diagram (CFAD) are performed. The evolution feature of convective cells is also searched using time series of radar-based parameters and various brightness temperatures (TBs).

In the convective regions, the reflectivity CFADs above melting layer show wider distribution patterns than those of stratiform. Especially, the frequency distribution of updraft embedded in convective areas are concentrated in above 30 dBZ at upper layers (above 6 km height). These phenomena might indicate that supercooled water droplet and rimed ice particles are coexisted. The peak of mean TBs at mature stage is 235 K whereas those of other stages (e.g. growing) is 260 K. In the case study, the top 10th percentile of upper vertical integration liquid water contents (UVIL) and upper mean reflectivity (UMZ) in growing stage are relatively higher than those of other stages. The statistical trends of feature parameters consisting of various convective cells will be performed and supplemented.

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