An observational study of the 7 September 2005 Barcelona tornado outbreak
An observational study of the 7 September 2005 Barcelona tornado outbreak
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对 2005 年 9 月 7 日巴塞罗那龙卷风爆发的观察性研究
DOI：
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发表时间：
2007
期刊：
影响因子：
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通讯作者：
M. Gayà
中科院分区：
文献类型：
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作者：
J. Bech;R. Pascual;T. Rigo;N. Pineda;J. M. López;J. Arús;M. Gayà
摘要。本文介绍了2005年9月7日在略布列加特三角洲发生的龙卷风爆发的观测研究，影响了一个人口稠密的城市化地区和巴塞罗那国际机场（西班牙东北部）。现场调查证实至少有五次短暂的龙卷风。其中4个为弱（F0, F1），另一个为显著（Fujita量表F2）。它们起初大多是水龙卷，后来向内陆移动，造成了大约900万欧元的巨大损失，三人受伤，但幸运的是没有人死亡。大尺度强迫由上层扩散和低层暖空气平流提供。卫星和气象雷达图像显示，在高度剪切和相对低浮力的环境中，形成水龙卷的单体沿着中尺度辐合线发展。进一步的分析表明，这些特征可以区分为非超级单体雷暴或迷你超级单体雷暴。
Abstract. This paper presents an observational study of the tornado outbreak that took place on the 7 September 2005 in the Llobregat delta river, affecting a densely populated and urbanised area and the Barcelona International airport (NE Spain). The site survey confirmed at least five short-lived tornadoes. Four of them were weak (F0, F1) and the other one was significant (F2 on the Fujita scale). They started mostly as waterspouts and moved later inland causing extensive damage estimated in 9 million Euros, three injured people but fortunately no fatalities. Large scale forcing was provided by upper level diffluence and low level warm air advection. Satellite and weather radar images revealed the development of the cells that spawned the waterspouts along a mesoscale convergence line in a highly sheared and relatively low buoyant environment. Further analysis indicated characteristics that could be attributed indistinctively to non-supercell or to mini-supercell thunderstorms.