Sounding‐derived parameters associated with tornadic storms in Catalonia
Sounding‐derived parameters associated with tornadic storms in Catalonia
复制标题
与加泰罗尼亚龙卷风相关的探测参数
DOI：
10.1002/joc.5343
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发表时间：
2018
期刊：
影响因子：
--
通讯作者：
J. Bech
中科院分区：
文献类型：
--
作者：
Oriol Rodríguez;J. Bech
加泰罗尼亚是位于地中海盆地西部的南欧沿海地区，根据2000年至2016年的数据，每年平均会产生5次龙卷风和12次水龙卷。尽管这些龙卷风大多很弱-在增强的藤田（EF）破坏强度等级上不超过EF 1-但它们偶尔会达到更强的强度，对人口和社会经济活动构成明显威胁，特别是在人口稠密的沿海城市，如塔拉戈纳或巴塞罗那。这项研究提供了有利于该地区龙卷风风暴形成的高空空气条件的分析，考虑了西班牙和法国的五个不同站点，建立了一个包含333个探测数据库，其中包括49个龙卷风探测，104个水龙卷探测（WAT）以及非龙卷风雷暴和干燥期探测。对于每一个，计算和分析了12个不同的参数，以测试它们区分非龙卷风环境和龙卷风环境的潜在能力，并评估龙卷风强度分层（EF尺度上的EF 0和EF 1或更强）的可行性。结果表明，0-3 km层的风暴相对螺旋度，阈值为150 m2 s−2，同一层的风切变，阈值为15 m s−1，以及复合参数，例如阈值为1.2的超级单体复合参数和阈值为0.3的通用龙卷风指数，都有助于区分非龙卷风雷暴和EF 1或更强雷暴龙卷风事件这些结果有助于更好地描述有利于该区域龙卷风风暴的高空空气条件的气候学，也有助于业务天气预报和监测任务，从而提高对强对流天气事件的情况认识。
Catalonia, a southern Europe coastal region in the western Mediterranean basin, is regularly affected by severe local storms which every year produce an average of 5 tornadoes and 12 waterspouts, based on data recorded from 2000 to 2016. Despite these tornadoes mostly being weak – not exceeding EF1 on the enhanced Fujita (EF) damage intensity scale – they occasionally reach stronger intensities, posing an evident threat to population and socio‐economic activity, particularly in densely populated coastal conurbations such as Tarragona or Barcelona. This study provides analysis of upper air conditions that favour the formation of tornadic storms in the region, considering five different stations in Spain and France to build a database of 333 soundings which included 49 tornadic soundings, 104 waterspout soundings (WAT) as well as non‐tornadic thunderstorms and dry period soundings. For each one, 12 different parameters were calculated and analysed to test their potential capacity to discriminate non‐tornadic from tornadic environments and also to assess the feasibility of stratifying tornado intensity (EF0, and EF1 or stronger, on the EF scale). The results indicate that storm‐relative helicity for the layer 0–3 km, with a threshold value of 150 m2 s−2, wind shear for the same layer, with a threshold of 15 m s−1, and composite parameters such as the supercell composite parameter with a threshold of 1.2 and universal tornadic index with a threshold of 0.3 are all useful to distinguish between non‐tornadic thunderstorms and EF1 or stronger tornadic events. These results contribute to a better description of the climatology of upper air conditions that favour tornadic storms in the region and can also help operational weather forecasting and surveillance tasks, thus increasing situational awareness in severe convective weather events.
不列颠群岛的气候学、风暴形态和龙卷风环境：1980-2012
影响因子：
3.2
作者：
Schultz D
通讯作者：
Schultz D