| 2018年9月丹东连续两次风雹天气的多尺度对比分析 |
| |
| 引用本文： | 徐璐璐,李倩,李慧琳,韩梅,罗箭宇,孟鑫.2018年9月丹东连续两次风雹天气的多尺度对比分析[J].气象与环境学报,2019,35(6):1-7. |
| |
| 作者姓名： | 徐璐璐 李倩 李慧琳 韩梅 罗箭宇 孟鑫 |
| |
| 作者单位： | 丹东市气象局,辽宁 丹东 118000;沈阳区域气候中心,辽宁 沈阳 110016;本溪市气象局,辽宁 本溪 117000 |
| |
| 基金项目： | 2019年中国气象局预报员专项"两种EFI指数在辽宁强降水预报中的检验及应用"（CMAYBY2019-026）和2019年市县级气象局自筹资金科研课题"智能网格要素预报在丹东地区的预报性能检验和订正"（2019SXG15）共同资助。 |
| |
| 摘 要： | 利用高空、地面等常规气象资料和多普勒雷达等气象观测资料，以及NCEP再分析资料，对丹东2018年9月连续出现的两次风雹天气进行对比分析，探讨和总结两次风雹天气过程形成、维持、发展成因的异同。结果表明：中低层切变线、强垂直风切变和辐合抬升有利于风雹天气的发生。高空冷空气的入侵方式和强度、低空急流建立、环境垂直风切变强度对风雹天气剧烈程度有重要影响。两次风雹天气过程分别为东北冷涡型和高空冷槽型，9月6日横槽转竖引导冷空气快速移动并且后方还有冷涡后部的冷空气不断补充，配合850 hPa西南急流带来充沛水汽，使得6日风雹天气现象较3日更加剧烈；两次风雹天气过程在多普勒雷达回波上的特征明显。9月3日的风雹过程由多单体线对流风暴在东移过程中逐渐演变成弓形回波，在径向速度图上有明显的逆风区；9月6日的风雹过程沿地面辐合线激发多个超级单体呈现列车效应移动，径向速度图上出现了速度模糊，有较高的垂直累积液态水含量（Vertical Integrated Liquid water content，VIL）。
|
| 关 键 词： | 风雹 雷达回波 多尺度 东北冷涡 |
| 收稿时间： | 2019-03-14 |
Multi-scale comparative analysis of two hail events in Dandong in September 2018 |
| |
| XU Lu-lu,LI Qian,LI Hui-lin,HAN Mei,LUO Jian-yu,MENG Xin.Multi-scale comparative analysis of two hail events in Dandong in September 2018[J].Journal of Meteorology and Environment,2019,35(6):1-7. |
| |
| Authors: | XU Lu-lu LI Qian LI Hui-lin HAN Mei LUO Jian-yu MENG Xin |
| |
| Institution: | 1. Dandong Meteorological Service, Dandong 118000, China;2. Shenyang Regional Climate Center, Shenyang 110016, China;3. Benxi Meteorological Service, Benxi 117000, China |
| |
| Abstract: | Based on conventional meteorological observations in the upper air and at the ground,observational data from a Doppler Radar,and National Centers for Environmental Prediction (NCEP) reanalysis data,we comparatively analyzed the characteristics of formation,maintenance,and development of two hail events that occurred successively in September 2018 in Dandong.The results indicated that low-level wind shear lines,strong vertical wind shears,and convergence lifting are favorable for the occurrence of hail events.The intensity of hail events is greatly influenced by the intruding way and strength,the establishment of low-level jets,and vertical wind shears.The two hail events are caused by a Northeast Cold Vortex (NCV) and an upper-level cold trough,respectively.On September 6,the turn of transverse trough leads to the fast movement of cold air masses that are supplemented from the rear of the cold vortex,and the southwest jets at 850 hPa transport plenty of water vapor,which enhanced the hail event compared with that on September 3.The radar echoes show distinct features during the two hail events.On September 3,a convective storm from multiple monomer lines gradually turns into an arched echo when it moves towards the east,with a clear headwind area on the radial velocity map.While on September 6,several super monomers are triggered along the ground convergence line and show the train effect movement.The radial velocity map appears to be blurred and shows a higher Vertical Integrated Liguid water content (VIL). |
| |
| Keywords: | Hail Radar echo Multi-scale Northeast Cold Vortex (NCV) |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
| 点击此处可从《气象与环境学报》浏览原始摘要信息 |
| 点击此处可从《气象与环境学报》下载免费的PDF全文 |
|
