| 广西0823台前飑线诊断分析 |
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| 引用本文： | 杨玉莲,陈思毅,梁俊聪.广西0823台前飑线诊断分析[J].安徽农业科学,2012,40(17):9401-9404. |
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| 作者姓名： | 杨玉莲 陈思毅 梁俊聪 |
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| 作者单位： | 1. 广西机场管理集团梧州机场有限责任公司空管部,广西梧州,543002
2. 广西梧州市气象台,广西梧州,543002 |
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| 摘 要： | 利用高空、卫星云图、欧洲中心物理量场、自动站资料以及南宁、梧州两站的多普勒雷达产品,对2010年8月23日影响广西南部的一次较大范围的台前飑线过程进行诊断分析。结果表明,此次过程主要受热带风暴"蒲公英"外围螺旋云带以及副高南缘偏东气流共同作用所致;红外云图表明此次飑线过程的云系特征在17:00～18:00最为明显,且在飑线最为活跃的时段地面风场出现类似暖式切变线的风场结构。雷达拼图及两部多普勒雷达的基本反射率均表明,影响回波在17:00前后呈显著的线状排列结构,且还可细分为两段结构差别明显的回波带;梧州、南宁雷达分别观测到影响回波在发展、成熟阶段均出现表征风速辐合的与雷达扫描圆周相平行的零径向速度线;谱宽值分布表明大气的强对流运动主要发生在影响回波的前端、风速辐合处以及阵风锋当中。
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| 关 键 词： | 台前飑线 台风 广西 诊断分析 |
A Diagnostic Analysis on Typhoon Squall Line in Guangxi on August 23, 2010 |
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| Institution: | YANG Yu-lian et al(Department of Air Traffic Control,Wuzhou Airport,Guangxi Airport Group,Wuzhou,Guangxi 543002) |
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| Abstract: | A diagnostic analysis was carried out on a typhoon squall line happened in South Guangxi on August 23,2010 with the data such as the upper air data,the satellite cloud picture,the EC physical reanalysis data,the automatic meteorological station data and the Doppler radar data of Nanning and Wuzhou.The result showed that the typhoon squall line was caused by the spiral cloud band of MINDULLE and the east-deviated air flow of the south border of subtropical high.The satellite cloud picture showed that the most notable cloud characteristic of typhoon squall line appeared from 17:00 to 18:00,when there were similar shear wind field appeared in surface wind field.Both the radar mosaic and two Doppler radars reflected that the impact echo with notable linear structure appeared at about 17:00 can be divided into two parts.The evolution period and the mature phase of the impact echo,which can be observed respectively by Wuzhou radar and Nanning radar,both generated zero radial speed line which represented the wind speed convergence and parallelized with the radar scan circumference.The distribution of the spectral width showed that the strong convection appeared mainly at the front of the impact echo,in the wind speed convergence and the gust front. |
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| Keywords: | Typhoon squall line Typhoon on augulst 23 2010 guangxi Diagnostic analysis |
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