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Distinguishing features of high altitude negative leaders as observed with LOFAR

Scholten, O.; Hare, B. M.; Dwyer, J.; Liu, N.; Sterpka, C.; Buitink, S.; Corstanje, A.; Falcke, H.; Huege, T. 1; Hörandel, J. R.; Krampah, G. K.; Mitra, P.; Mulrey, K.; Nelles, A.; Pandya, H.; Rachen, J. P.; Trinh, T. N. G.; Veen, S. ter; Thoudam, S.; ... mehr

Abstract:

We present high resolution observations of negative leaders at high altitude using the LOFAR radio telescope. We show that the structure of negative leaders at high altitude (altitudes larger than 7 km) differs in several respects from that of negative leaders at lower altitudes. In particular, the High Altitude Negative Leaders (HANLs) show very distinct steps of a few hundred meters, stepping times of the order of a few milliseconds and a filamentary structure that extends outward over several hundreds of meters; as opposed to lower altitude (≲ 5 km) leaders, which have stepping times and distances around 0.01 ms and 10 m. Similar to lower altitude leaders, high altitude leaders emit copious VHF radiation from their propagating tip and have propagation velocities of the order of 105 m/s. Corona-flash like bursts can be distinguished when zooming in to meter and nanosecond scales.


Verlagsausgabe §
DOI: 10.5445/IR/1000135701
Veröffentlicht am 23.07.2021
Originalveröffentlichung
DOI: 10.1016/j.atmosres.2021.105688
Web of Science
Zitationen: 3
Dimensions
Zitationen: 3
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Astroteilchenphysik (IAP)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 01.10.2021
Sprache Englisch
Identifikator ISSN: 0169-8095, 1873-2895
KITopen-ID: 1000135701
HGF-Programm 51.13.04 (POF IV, LK 01) Kosmische Strahlung Technologien
Erschienen in Atmospheric Research
Verlag Elsevier
Band 260
Seiten Art.-Nr.: 105688
Vorab online veröffentlicht am 26.05.2021
Nachgewiesen in Dimensions
Web of Science
Scopus
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