Polarimetric Signatures of a Supercell Thunderstorm Occourred in Gaomi on 3 August 2020
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Abstract:
Using Qingdao dual-polarization CINRAD/SA data, sounding and automatic meteorological station data, the polarimetric signatures of a supercell storm occurred in Gaomi, Shandong Province on 3 August 2020 are analyzed. The results show that: (1) The key environmental factors to the development and maintenance of the Gaomi supercell were the strong CAPE, strong low-level vertical wind shear, 200 hPa strong divergence and high humidity. (2) The ZDR arcs and KDP high-value areas were important characteristics of the lower layer. The ZDR arcs matched the high-value region of reflectivity factor gradient on one side of the inflow and correspond to smaller KDP, which were caused by a few large particles. The KDP high-value area in the middle of the storm, corresponding to the smaller ZDR (1-3 dB), larger CC, caused by the high concentration of smaller particles, was the heavy rainfall area. (3) TheZDR ring around BWER, corresponding to smaller KDP, indicate that a small number of large droplets were distributed around BWER. The deep and wide ZDR and KDP columns above the BWER indicate that the higher concentration of large droplets was distributed above the BWER. (4) Abundant liquid particles under the -20 ℃ layer and abundant graupel and ice crystal particles above the -20 ℃ layer were the typical vertical characteristics of the microphysics of the Gaomi supercell.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.