ISSN 1000-0526
CN 11-2282/P
CN 11-2282/P
Observational Analysis of Different Intensity Severe Convective Clouds by S-Band Dual-Polarization Radar
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Abstract:
Three cases of severe convection with different intensities, including supercell, common hail storm and non-hail storm, observed by Xiamen S-band dual-polarization radar are presented in this paper. The characteristic differences of dual-polarization radar in these cases, containing differential reflectivity (ZDR), specific differential phase (KDP) and co-polar correlation coefficient (CC) during storm developing from growing stage to mature stage were analyzed. The ZDR and KDP columns are common features existing in these different intensities of storms. The supercell and common hail storm also have CC hole characteri-stics, featuring the inflow area near ground. In addition, ZDR arc and KDP foot also appear at low level and CC low value region with big hails at high level in mature stage of supercell. The variation of ZDR column can be used to identify super-cooled water area and forecast the developing trend of severe convective clouds. The CC hole can be used to identify the inflow area of convective cell. Then KDP column, KDP foot or its vacancy can be used to identify the areas of heavy rain or big hails. Therefore, the feature identification of dual-polarization radar have great potentials in short-term early warning of severe convection and hail suppression.
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