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DOI | 10.1016/j.atmosres.2017.06.030 |
Spatio-temporal dimension of lightning flashes based on three-dimensional Lightning Mapping Array | |
Lopez, Jesus A.1; Pineda, Nicolau1,2; Montanya, Joan1; van der Velde, Oscar1; Fabro, Ferran1; Romero, David1 | |
2017-11-15 | |
发表期刊 | ATMOSPHERIC RESEARCH |
ISSN | 0169-8095 |
EISSN | 1873-2895 |
出版年 | 2017 |
卷号 | 197 |
文章类型 | Article |
语种 | 英语 |
国家 | Spain |
英文摘要 | 3D mapping system like the LMA - Lightning Mapping Array - are a leap forward in lightning observation. LMA measurements has lead to an improvement on the analysis of the fine structure of lightning, allowing to characterize the duration and maximum extension of the cloud fraction of a lightning flash. During several years of operation, the first LMA deployed in Europe has been providing a large amount of data which now allows a statistical approach to compute the full duration and horizontal extension of the in-cloud phase of a lightning flash. The "Ebro Lightning Mapping Array" (ELMA) is used in the present study. Summer and winter lighting were analyzed for seasonal periods (Dec-Feb and Jun-Aug). A simple method based on an ellipse fitting technique (EFT) has been used to characterize the spatio-temporal dimensions from a set of about 29,000 lightning flashes including both summer and winter events. Results show an average lightning flash duration of 440 ms (450 ms in winter) and a horizontal maximum length of 15.0 km (18.4 km in winter). The uncertainties for summer lightning lengths were about +/- 1.2 km and +/- 0.7 km for the mean and median values respectively. In case of winter lightning, the level of uncertainty reaches up to 1 km and 0.7 km of mean and median value. The results of the successful correlation of CG discharges with the EFT method, represent 6.9% and 35.5% of the total LMA flashes detected in summer and winter respectively. Additionally, the median value of lightning lengths calculated through this correlative method was approximately 17 km for both seasons. On the other hand, the highest median ratios of lightning length to CG discharges in both summer and winter were reported for positive CG discharges. |
英文关键词 | Cloud lightning Spatial and temporal flash dimensions Ellipse fitting Lightning Mapping Array |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000412250700021 |
WOS关键词 | CHARGE STRUCTURE ; POSITIVE CLOUD ; GROUND FLASHES ; RAIN CELLS ; RADAR ; SYSTEM ; MULTIPLICITY ; DISCHARGES ; FRACTION ; THREAT |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
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/38335 |
专题 | 地球科学 |
作者单位 | 1.Tech Univ Catalonia, Lightning Res Grp, Edifici TR1,Caner Colom 1, Terrassa 08222, Spain; 2.Meteorol Serv Catalonia, Carer Berlin 38-46, Barcelona 08029, Spain |
推荐引用方式 GB/T 7714 | Lopez, Jesus A.,Pineda, Nicolau,Montanya, Joan,et al. Spatio-temporal dimension of lightning flashes based on three-dimensional Lightning Mapping Array[J]. ATMOSPHERIC RESEARCH,2017,197. |
APA | Lopez, Jesus A.,Pineda, Nicolau,Montanya, Joan,van der Velde, Oscar,Fabro, Ferran,&Romero, David.(2017).Spatio-temporal dimension of lightning flashes based on three-dimensional Lightning Mapping Array.ATMOSPHERIC RESEARCH,197. |
MLA | Lopez, Jesus A.,et al."Spatio-temporal dimension of lightning flashes based on three-dimensional Lightning Mapping Array".ATMOSPHERIC RESEARCH 197(2017). |
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