气象2025，Vol.51Issue(9)：1137-1145,9.DOI:10.7519/j.issn.1000-0526.2025.011001
滇西南冰雹的X波段双偏振雷达特征统计
Statistical Analysis of X-Band Dual-Polarization Radar Characteristics of Hail in Southwestern Yunnan
摘要
Abstract
To obtain the X-band dual-polarization radar characteristics of hail in southwestern Yunnan,a statistical analysis method is used to analyze 22 hail sample data detected by the Menglian X-Band Dual-Polarization Radar.The results show that hailstorm cells have maximum horizontal reflectivity factor(ZH)≥58 dBz,45 dBz echo height(H45)≥7.1 km,with a height difference between H45 and the wet-bulb 0℃level being ≥3.3 km.H45 above 86％of hail cells have exceeding the height of the-20℃ layer.50 dBz echo height(H50)is ≥5.7 km,with a height difference between H50 and the-20℃ level ranging from-1.2 km to 2.7 km.Vertical integrated liquid water content(VIL)density is ≥2.8 g·m-3,and the VIL is increased by 4.7-18.3 kg·m-2 in the volume scan preceding hailfall.When differential reflectivity(ZDR)and specific differential phase(KDP)average and median values are above 0℃ layer,they are concen-trated near the value of 0 dB and 0 °·km-1,predominantly being negative.Below 0℃ layer within 1 km,they change from negative to positive values,gradually increasing with the height decrease.The maximum values appear in the near-surface layer,reaching approximately 1.5 dB and 0.7 °·km-1respectively.The ranges of values for parameters above the 0℃ layer are:ZDR from-1.92 dB to 1.35 dB,KDP from-1.97 °·km-1to 1.29 °·km-1,and correlation coefficient(CC)from 0.86 to 0.99,while below the 0℃ layer,ZDR from-1.92 dB to 3.74 dB,KDP from-2.98 °·km-1to 2.66 °·km-1,and CC from 0.79 to 0.98.The re-search results could be a reference for the detection and identification of hail characteristics by the X-band dual-polarization radar in the southwestern Yunnan Region.关键词
双偏振雷达/X波段/冰雹/回波特征/偏振参量Key words
dual-polarization radar/X-band/hail/echo characteristic/polarization parameter分类
天文与地球科学引用本文复制引用
姚自伟,龚红梅,陈卓,高正南,何泉威..滇西南冰雹的X波段双偏振雷达特征统计[J].气象,2025,51(9):1137-1145,9.基金项目
云南省基层台站气象科技创新与能力提升计划项目(STIAP202229、STIAP202233、STIAP202333)共同资助 （STIAP202229、STIAP202233、STIAP202333）
