| 一次致灾超级单体雹暴过程数值模拟和发展机制分析 |
| |
| 引用本文： | 吴福浪,杨丽敏,蒋迪,陶俞锋,陈九龄.一次致灾超级单体雹暴过程数值模拟和发展机制分析[J].气象科技,2021,49(1):86-94. |
| |
| 作者姓名： | 吴福浪 杨丽敏 蒋迪 陶俞锋 陈九龄 |
| |
| 作者单位： | 中国民用航空宁波空中交通管理站，宁波 315154;西藏自治区气象台，拉萨 850000;民航华东地区空中交通管理局气象中心，上海 200335 |
| |
| 摘 要： | 利用高分辨率中尺度数值模式WRF,模拟了2019年3月21日发生在浙江省的一次大范围致灾超级单体雹暴过程,结合多普勒雷达探测产品,分析了风暴的雷达回波结构、流场结构、各类水成物等特征及其演变,并探究冰雹形成的物理机制。结果表明:此次雹暴过程是在高空急流轴右侧和低层切变线相重叠的区域发生和发展的,强垂直风切变有利于雹暴的维持和发展。实况超级单体雹暴在雷达回波上呈现出钩状回波、持久深厚的中气旋、典型的高悬强回波、有界弱回波区和三体散射现象。模拟试验成功地模拟出了雹暴云团的水平演变和垂直结构特征。合适的0℃和-20℃高度以及-20~0℃层厚度有利于雹粒的增长。雹粒子主要由云水、过冷雨水和雪粒子转化形成,再通过碰并过冷云水、冰晶、雪粒子而不断增长。
|
| 关 键 词： | 超级单体 雹暴 多普勒雷达 数值研究 |
| 收稿时间： | 2020/1/1 0:00:00 |
| 修稿时间： | 2020/5/18 0:00:00 |
Numerical Modeling of a Disastrous Supercell Hailstorm and Analysis on Its Developing Mechanism |
| |
| WU Fulang,YANG Limin,JIANG Di,TAO Yufeng,CHEN Jiuling.Numerical Modeling of a Disastrous Supercell Hailstorm and Analysis on Its Developing Mechanism[J].Meteorological Science and Technology,2021,49(1):86-94. |
| |
| Authors: | WU Fulang YANG Limin JIANG Di TAO Yufeng CHEN Jiuling |
| |
| Institution: | (Ningbo Air Traffic Management Station of CAAC,Ningbo 315154;Meteorological Observatory of Tibet Autonomous Region,Lhasa 850000;Air Traffic Administration Meteorological Center of East China,Shanghai 200335) |
| |
| Abstract: | A wide-range disastrous supercell hailstorm occurred in Zhejiang Province on 21March 2019is simulated by using the high-resolution mesoscale WRF model.Combined with Doppler radar detection products,the characteristics of radar echo structure,flow field structure,hydrometeors and their evolutions are analyzed,and the physical mechanism of hail formation is explored.The results show that the hailstorm occurred and developed in the area where the right side of the high-level jet axis overlapped with the low-level shear line.Strong vertical wind shear contributes to its maintenance and development.The supercell hailstorm exhibits typical characteristics of hook echo,long-lasting deep mesocyclone,strong hanging echo,bounded weak echo area,and strong three-body scattering on radar echoes.The simulation experiment successfully simulated the horizontal evolution and vertical structure of the hailstorm clouds.Suitable layer heights of 0℃and-20℃,as well as an appropriate thickness of the 0℃to-20℃layer,are conducive to the growth of hail particles.Hail particles are mainly transformed from cloud water,supercooled rain water and snow particles and then continue to grow by collision-coalescing with supercooled cloud water,ice crystals and snow particles. |
| |
| Keywords: | supercell hailstorm doppler radar numerical study |
| 本文献已被 CNKI 维普 等数据库收录！ |
| 点击此处可从《气象科技》浏览原始摘要信息 |
| 点击此处可从《气象科技》下载免费的PDF全文 |
|
