Naslov
Polarimetric radar characteristics of lightning initiation and propagating channels

Autori
Figueras i Ventura, Jordi ; Pineda, Nicolau ; Besic, Nikola ; Grazioli, Jacopo ; Hering, Alessandro ; van der Velde, Oscar A. ; Romero, David ; Sunjerga, Antonio ; Mostajabi, Amirhossein ; Azadifar, Mohammad ; Rubinstein, Marcos ; Montanyà, Joan ; Germann, Urs ; Rachidi, Farhad

Izvornik
Atmospheric Measurement Techniques (1867-1381) 12 (2019), 5; 2881-2911

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Polarimetric radar characteristics of lightning initiation and propagating channels

Sažetak
In this paper we present an analysis of a large dataset of lightning and polarimetric weather radar data collected in the course of a lightning measurement campaign that took place in the summer of 2017 in the area surrounding Säntis, in the northeastern part of Switzerland. For this campaign and for the first time in the Alps, a lightning mapping array (LMA) was deployed. The main objective of the campaign was to study the atmospheric conditions leading to lightning production with a particular focus on the lightning discharges generated due to the presence of the 124 m tall Säntis telecommunications tower. In this paper we relate LMA very high frequency (VHF) sources data with co-located radar data in order to characterise the main features (location, timing, polarimetric signatures, etc.) of both the flash origin and its propagation path. We provide this type of analysis first for all of the data and then we separate the datasets into intra-cloud and cloud-to-ground flashes (and within this category positive and negative flashes) and also upward lightning. We show that polarimetric weather radar data can be helpful in determining regions where lightning is more likely to occur but that lightning climatology and/or knowledge of the orography and man-made structures is also relevant.

Izvorni jezik
Engleski

POVEZANOST RADA