Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1016/j.atmosres.2021.105577 |
Thunderstorm charge structures favouring cloud-to-ground lightning | |
Albert Salvador, Nicolau Pineda, Joan Montanyà, Jesús A. López, Gloria Solà | |
2021-03-20 | |
发表期刊 | Atmospheric Research |
出版年 | 2021 |
英文摘要 | Thunderstorm electrical structures favouring cloud-to-ground lightning were investigated through a Lightning Mapping Array (LMA), an accurate three-dimensional lightning location system that allows inferring the heights of the regions of charge. The present study focused on classical, convective-scale thunderstorms, aiming to shed new light on how the charge structure affects lightning production, especially the cloud-to-ground fraction, including flash rate and polarity. Results showed that lightning flashes mainly initiate at two levels, around −41 °C (9,150 m MSL) and around −7 °C height (4730 m MSL). These initiation levels, located between the dominant positive and negative charge regions, allowed to define three main charge structures: an upper dipole (positive above negative), a classical tripole and a lower dipole (negative above positive). Several differences were found between the three categories in terms of the cloud-to-ground lightning production: (i) the classical tripole structure is the one presenting a higher cloud-to-ground flash rate (5.2 flashes·min−1); (ii) in terms of intensity, the presence of an upper positive charge region is more relevant than a lower positive below the main mid negative; (iii) conversely, the lower positive favours higher cloud-to-ground peak currents; (iv) A higher upper positive charge region favours a higher cloud-to-ground rate. |
领域 | 地球科学 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/319809 |
专题 | 地球科学 |
推荐引用方式 GB/T 7714 | Albert Salvador, Nicolau Pineda, Joan Montanyà, Jesús A. López, Gloria Solà. Thunderstorm charge structures favouring cloud-to-ground lightning[J]. Atmospheric Research,2021. |
APA | Albert Salvador, Nicolau Pineda, Joan Montanyà, Jesús A. López, Gloria Solà.(2021).Thunderstorm charge structures favouring cloud-to-ground lightning.Atmospheric Research. |
MLA | Albert Salvador, Nicolau Pineda, Joan Montanyà, Jesús A. López, Gloria Solà."Thunderstorm charge structures favouring cloud-to-ground lightning".Atmospheric Research (2021). |
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