| 万夫敬1，2，江敦双1，赵传湖3.2017年8月6日山东罕见雷暴大风成因分析[J].海洋气象学报,2018,38(2):60-66 |
| 2017年8月6日山东罕见雷暴大风成因分析 |
| Analysis of an unusual thunderstorm gale in Shandong on 6 August 2017 |
| 投稿时间：2018-01-31 修订日期：2018-04-08 |
| DOI：10.19513/j.cnki.issn2096-3599.2018.02.008 |
| 中文关键词: 中气旋 飑线 雷暴大风 中层径向辐合 |
| 英文关键词: mesocyclone squall line thunderstorm gale MARC |
| 基金项目:山东省气象局科研项目（SDYBY2017-06，sdqd2017-01，sdqd2013-02）；青岛市气象局科研项目（2016qdqxq1，2015qdqxc03，2014qdqxc02） |
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| 中文摘要: |
| 利用多普勒天气雷达资料和常规观测资料，分析了2017年8月6日山东东部地区一次罕见的极大风速达到12～13级的雷暴大风事件。此次过程发生在高空西北气流影响下，中低层强垂直风切变和较大的温度直减率为雷暴大风的出现提供了有利环境条件。中尺度边界辐合线不断触发新的对流单体，最终形成飑线结构。此次过程10级以上雷暴大风在雷达图上的主要特征包括：近地层显著的径向辐散（速度差≥35 m·s-1）或者大的径向速度（速度绝对值≥29 m·s-1）；较显著的中层径向辐合（MARC）特征（速度差≥30 m·s-1）或者强中反气旋结构（速度差≥31 m·s-1）；中气旋底部高度扩展至2 km以下等特征。 |
| 英文摘要: |
| Based on the data from Doppler weather radar and regular observations，the characteristics of a thunderstorm gale with the maximum instantaneous wind over 12-13 grade occurring in the east of Shandong are analyzed. It is a thunderstorm gale case under the influence of upper northwestern current, and the lower vertical wind shear and high temperature lapse rate are favorable for the occurrence of it. The mesoscale boundary convergence line constantly triggers new convection cells and eventually the squall line structure comes into being. Features such as obvious radial divergence on surface layer (velocity difference≥35 m·s-1) or large radial velocity region (absolute value of velocity≥29 m·s-1), MARC (velocity difference≥30 m·s-1), strong meso anticyclone at middle level (velocity difference≥31 m·s-1) and mesocyclone bottom height below 2 km are evident in the radial velocity chart for the thunderstorm gale stronger than storm in the process. These characteristics are of significant importance in disastrous gale detection and its early warning. |
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