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DOI	10.1016/j.atmosres.2020.105208
	On the conditions for winter lightning at the Eagle Nest Tower (2537 m asl) during the Cerdanya-2017 field experiment
	Soula S.; Pineda N.; Georgis J.-F.; Leroy A.; Vanpoucke I.; Montanyà J.; Casellas E.; Gonzalez S.; Bech J.
发表日期	2021
ISSN	0169-8095
卷号	247
英文摘要	In this paper, we analyze meteorological conditions, thundercloud structure, lightning activity and characteristics of the flashes that strike two towers separated by 1.3 km on Tosa d'Alp (2537 m asl) for two days (March 24 and 31) of the Cerdanya-2017 field campaign. Remote sensing products (cloud top temperature, lightning flash location, volumetric radar scans) and a set of sensors installed at Cerdanya station (electric field mill, microwave radiometer, vertically-pointing K-band Doppler radar, atmospheric soundings) provide the data for the analysis. A total of 20 flashes (72 strokes) have been detected on these towers with a large majority on March 24 (18 flashes and 66 strokes), despite of a lower convective activity in the study region. All these flashes are negative and most of them exhibit the features of upward flashes: large multiplicity (3.67 in average on March 24), strokes with low peak current (−10.6 kA in average on March 24), and short inter-stroke time interval (40 ms in average on March 24). Some flashes are supposed to be self-triggered on the towers because of the absence (the low number) of VHF sources before (after) the strokes. Compared to the instrumented “Eagle Nest Tower”, the “Cerdanya Tardia Antenna” collects a greater number of flashes (strokes) during the most prolific day with 14 out of 18 (57 out of 66). During this day, all flashes that radiate in VHF at less than 5 km from the towers strike them. We observe also that the cloud region around −15 °C favorable for charging process is located at lower altitude (1000 m above tower altitude) and produce strong radar reflectivity values on that day. Furthermore, the wind at the altitude of Tosa d'Alp stronger on March 24 could facilitate the inception from the towers by evacuating the corona ions. © 2020 Elsevier B.V.
语种	英语
scopus关键词	Antennas; Doppler radar; Lightning protection; Microwave devices; Microwave sensors; Remote sensing; Atmospheric sounding; Cloud-top temperatures; Convective activity; Electric field mill; Lightning activity; Meteorological condition; Microwave radiometers; Radar reflectivities; Towers; convective system; corona; Doppler radar; lightning; meteorology; radar; radiometer; remote sensing; thundercloud; Cerdanya
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/141744
作者单位	Laboratoire d'Aérologie, Université de Toulouse, CNRS, Toulouse, France; Meteorological Service of Catalonia, Barcelona, Spain; Lightning Research Group, Technical University of Catalonia, Terrassa, Spain; Dept. Applied Physics Meteorology, University of Barcelona, Barcelona, Spain; DT Catalonia, Agencia Estatal de Meteorología (AEMET), Barcelona, Spain
推荐引用方式 GB/T 7714	Soula S.,Pineda N.,Georgis J.-F.,et al. On the conditions for winter lightning at the Eagle Nest Tower (2537 m asl) during the Cerdanya-2017 field experiment[J],2021,247.
APA	Soula S..,Pineda N..,Georgis J.-F..,Leroy A..,Vanpoucke I..,...&Bech J..(2021).On the conditions for winter lightning at the Eagle Nest Tower (2537 m asl) during the Cerdanya-2017 field experiment.Atmospheric Research,247.
MLA	Soula S.,et al."On the conditions for winter lightning at the Eagle Nest Tower (2537 m asl) during the Cerdanya-2017 field experiment".Atmospheric Research 247(2021).