孤立单体中雹胚生长物理过程分析  

Physical Process Analysis of Hail Embryo Growth in Isolated Hailstorm Cell

作　　者：赵梓利 周筠珺[1,2] 邹书平[3] 杨哲 曾勇 ZHAO Zi-li;ZHOU Yun-jun;ZOU Shu-ping;YANG Zhe;ZENG Yong(College of Atmospheric Sciences,Chengdu University of Information Technology,Chengdu 610225,China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science&Technology,Nanjing 210044,China;Guizhou Province Weather Influencing Office,Guiyang 550081,China)

机构地区：[1]成都信息工程大学大气科学学院,成都610225 [2]南京信息工程大学气象灾害预警预报与评估协同创新中心,南京210044 [3]贵州省人工影响天气办公室,贵阳550081

出　　处：《科学技术与工程》2022年第28期12268-12277,共10页Science Technology and Engineering

基　　金：国家自然科学基金(41875169);第二次青藏高原综合科学考察研究项目(2019QZKK0104);四川省科技计划(2022YFS0545);贵州省科技计划(黔科合支撑[2019]2387号,黔科合支撑[2022]一般206)。

摘　　要：为探究威宁地区孤立单体雹胚的演变特征,基于双线偏振雷达数据,通过模糊逻辑相态识别算法,研究了2018年3月30日雹暴过程霰粒子的演变特征。结果表明:在2018年3月30日雹暴发展阶段有一过冷水累积区存在,且该累积区范围在成熟阶段进一步扩大,维持至消散阶段;低密度霰分布于3~7 km,高密度霰分布于0~3 km,过冷水分布于1~4 km,冰雹分布于0~6 km,高密度霰和低密度霰对冰雹的生成都有贡献,但从整个降雹阶段分析,高密度霰为本次雹暴中冰雹的主要来源;冰雹区和过冷水累积区对应着反射率高值区,上升气流将高密度霰带往过冷水累积区形成冰雹是本次过程成雹的主要机制,通过对雹暴机制的分析,建立了相关概念模型。In order to explore the evolution characteristics of isolated single hail embryos in Weining area,the evolution characteristics of graupel particles during a hail storm on March 30,2018 were studied by using fuzzy logic phase state recognition algorithm based on dual-line polarization radar data.The results show that there is a supercooled water accumulation area during the hailstorm development stage on March 30,2018,and the accumulation area was further expanded in the mature stage and maintained to the dissipating stage.Low-density graupel is distributed in 3~7 km,high-density graupel in 0~3 km,supercooled water in 1~4 km,and hail in 0~6 km.Both high-density graupel and low-density graupel contribute to the generation of hail.However,from the analysis of the whole hail falling stage,high-density graupel is the main source of hail in this hail storm.Hail area and supercooled water accumulation area correspond to high reflectivity area.Updraft brings high-density graupel to supercooled water accumulation area to form hail,which is the main mechanism of hail formation in this process.Through the analysis of hail storm mechanism,relevant conceptual model was established.

关 键 词：粒子识别 微物理过程 雹胚 霰粒子 

分 类 号：P445[天文地球—大气科学及气象学]