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Seasonal variations on the conditions required for the lightning production

机译：避免生产所需条件的季节性变化

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摘要

Given the growing concern on lightning threats outside the main warm-season, the objective of this study is to get further insight on the seasonal variations of the necessary conditions required for the production of lightning. In this regard, the study aims to find a basic indicator of cloud electrification that could be useful as an all-year-round robust predictor to warn about lightning threats. To this end, a large dataset of weather radar data products, total lightning observations and radiosounding isotherm heights have been used.According to previous studies, the radar storm height is tightly correlated with the total lightning flash rate. A fifth order relationship fits from spring to autumn and a third order power law in winter. In spite of the good correlation between the radar storm height and the total lightning flash rate, the vertical development alone may be insufficient as a basic indicator for thunderstorm conditions. Alternatively, two different predictors for the lightning onset have been analysed: 12 dBZ radar reflectivity echoes reaching the -40 degrees C isotherm height and 35 dBZ reflectivity echoes reaching the -10 degrees C. Results show that the most suitable all-year-round predictor is the TOP -35 above -10 degrees C.
机译：鉴于主要暖季外的避雷威胁日益令人担忧，本研究的目的是进一步了解生产闪电所需必要条件的季节性变化。在这方面，该研究旨在找到一种云电气化的基本指标，可用作全年的鲁棒预测因素，以警告避免威胁。为此，已经使用了天气雷达数据产品的大型数据集，总避风观察和辐射等温度高度。根据先前的研究，雷达风暴高度与总闪电速率紧密相关。第五顺序关系围绕春季到秋季和冬季第三次权力法。尽管雷达风暴高度与总闪电闪光速率之间的相关性良好，但是单独的垂直开发可能不足以作为雷暴条件的基本指示。或者，已经分析了闪电发作的两个不同预测器：12个DBZ雷达反射率回波达到-40摄氏度高度，35dBz反射率回波达到-10℃。结果表明，最适合的全年圆形预测因子是Top-35以上-10度C.

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  • 来源
    《Atmospheric research》 |2020年第10期|104981.1-104981.11|共11页
  • 作者

    Salvador Albert; Pineda Nicolau; Montanya Joan; Sola Gloria;

  • 作者单位

    Meteorol Serv Catalonia Carrer Berlin 38-46 Barcelona 08029 Spain|Tech Univ Catalonia Lightning Res Grp Carrer Colom 1 Terrassa 08222 Spain;

    Meteorol Serv Catalonia Carrer Berlin 38-46 Barcelona 08029 Spain|Tech Univ Catalonia Lightning Res Grp Carrer Colom 1 Terrassa 08222 Spain;

    Tech Univ Catalonia Lightning Res Grp Carrer Colom 1 Terrassa 08222 Spain;

    Tech Univ Catalonia Lightning Res Grp Carrer Colom 1 Terrassa 08222 Spain;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Radar storm height; Total lightning flash rate; Lightning predictor;

    机译：雷达风暴高度;总闪电闪电率;闪电预测器;

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