Now showing items 21-40 of 76

    • Charge structure analysis of a severe hailstorm with predominantly positive cloud-to-ground lightning 

      Pineda Ruegg, Nicolau; Rigo, Tomeu; Montañá Puig, Juan; Van der Velde, Oscar Arnoud (2016-03-10)
      Article
      Restricted access - author's decision
    • Charge structure of two tropical thunderstorms in Colombia 

      López Trujillo, Jesús Alberto; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Pineda Rüegg, Nicolau; Salvador Yuste, Albert; Romero Durán, David; Aranguren Fino, Harby Daniel; Taborda, John (2019-04-23)
      Article
      Open Access
      Charge structure derived from lightning leader development of tropical thunderstorms comprising equatorial latitudes of < ±10° has not been investigated yet. In this work, using a Lightning Mapping Array (LMA) installed ...
    • Climatology of transient luminous events and lightning observed above Europe and the Mediterranean Sea 

      Arnone, E.; Bór, József; Chanrion, Olivier; Van der Velde, Oscar Arnoud (2019-11-04)
      Article
      Open Access
      In 1999, the first sprites were observed above European thunderstorms using sensitive cameras. Since then, Eurosprite campaigns have been conducted to observe sprites and other transient luminous events (TLEs), expanding ...
    • Comparison between high-speed video recordings of lightning and the detections of the Catalan Lightning Location Network (XDDE) 

      Montañá Puig, Juan; Pineda Rüegg, Nicolau; Solà de las Fuentes, Glòria; Van der Velde, Oscar Arnoud; Romero Durán, David; Aranguren Fino, Daniel (2010)
      Conference lecture
      Open Access
      Lightning detections of the Catalan Lightning Location Network (XDDE) are compared with high speed video recordings carried out in Spain during summer 2009. At that time the XDDE was composed by four sensors: two SAFIR 3000 ...
    • Dancing sprites: detailed analysis of two case studies 

      Soula, Serge; Mlynarczyk, Janusz; Fullekrug, Martin; Pineda Rüegg, Nicolau; Georgis, Jean-Francois; Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Fabró Tàpia, Ferran (2017-03-27)
      Article
      Open Access
      On 29–30 October 2013, a low-light video camera installed at Pic du Midi (2877¿m), recorded transient luminous events above a very active storm over the Mediterranean Sea. The minimum cloud top temperature reached -73°C, ...
    • Des jets géants au-dessus d’un orage isolé proche de la Réunion 

      Soula, Serge; Huet, Patrice; Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Barthe, Christelle; Bór, József (2012-05-01)
      Article
      Restricted access - author's decision
    • El delta de l’Ebre: mirador privilegiat per a l’observació de llamps i d’altres fenòmens elèctrics 

      Pineda Rüegg, Nicolau; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Romero Durán, David (2012-06-27)
      Article
      Open Access
      El delta de l’Ebre presenta les característiques idònies per ser un gran laboratori a l’aire lliure per a l’observació de llamps i d’altres fenòmens elèctrics, que tenen lloc per sobre dels núvols de tempesta. Aquests ...
    • Estudi de l'episodi tornàdic nocturn amb precipitacions intenses del 2 de novembre de 2008 a Catalunya 

      Van der Velde, Oscar Arnoud; Bech, Joan; Pineda Rüegg, Nicolau; Rigo, Tomeu; Aran, Montserrat; Amaró, Jésica; Gayà, M; Arús, J; Montañá Puig, Juan (2010)
      Conference lecture
      Restricted access - author's decision
      Aquest estudi presenta una anàlisi d’un episodi de temps sever que va tenir lloc la matinada del 2 de novembre de 2008, quan la costa sud de Catalunya va estar afectada per una intensa depressió que va dur associada ...
    • Evolution of gigantic jets at high temporal and spatial resolution 

      Van der Velde, Oscar Arnoud; Montanya, Joan; López Trujillo, Jesús Alberto (2018)
      Conference lecture
      Open Access
      Gigantic Jets (GJ) are lightning discharges between the cloud and the lower ionosphere, which manifest as leaders at low altitude and transition to streamers as they rise in altitude. The evolution has never been imaged ...
    • Fair weather induced charges and currents on tall wind turbines and experiments with kites 

      López Trujillo, Jesús Alberto; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Fabró Tàpia, Ferran; Romero Durán, David (Zakon Group, 2016)
      Conference report
      Open Access
      Earth’s atmospheric potential rapidly increases up to few tens of kilovolts below 200 m altitude. This potential drop will induce charge to tall objects at ground by virtue of electrostatic induction. In this work we ...
    • First data of the Colombia Lightning Mapping Array - COLMA 

      López Trujillo, Jesús Alberto; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Romero Durán, David; Aranguren Fino, Harby Daniel; Torres Sanchez, Horacio; Taborda, John; Martínez, Joaquin (Zakon Group, 2016)
      Conference report
      Open Access
      The first data set of VHF lightning mapping using a Lightning Mapping Array system - LMA in a tropical region is presented in this paper. Six sensors were installed at the north of Colombia near Santa Marta city. Since ...
    • Gigantic jet discharges evolve stepwise through the middle atmosphere 

      Van der Velde, Oscar Arnoud; Montanya, Joan; López Trujillo, Jesús Alberto; Cummer, Steven A. (2019-09-25)
      Article
      Open Access
      In 2002 it was discovered that a lightning discharge can rise out of the top of tropical thunderstorms and branch out spectacularly to the base of the ionosphere at 90¿km altitude. Several dozens of such gigantic jets have ...
    • Global distribution of winter lightning: a threat to wind turbines and aircraft 

      Montañá Puig, Juan; Fabró Tàpia, Ferran; Van der Velde, Oscar Arnoud; March Nomen, Víctor; Williams, Earle R.; Pineda Ruegg, Nicolau; Romero Durán, David; Solà de las Fuentes, Glòria; Freijo Álvarez, Modesto (2016-01-01)
      Article
      Open Access
      Lightning is one of the major threats to multi-megawatt wind turbines and a concern for modern aircraft due to the use of lightweight composite materials. Both wind turbines and aircraft can initiate lightning, and very ...
    • Gravity waves, meteor trails and asymmetries in elves 

      Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Fullekrug, Martin; Soula, Serge (Elsevier, 2011)
      Conference report
      Open Access
      From June 2008 to March 2011 more than 400 elves have been recorded by cameras in southern France and northeastern Spain. A considerable fraction of elves are not as uniform as predicted by theory. We demonstrate examples ...
    • High altitude leaders mapped by the Colombia lightning mapping array 

      Montañá Puig, Juan; López Trujillo, Jesús Alberto; Van der Velde, Oscar Arnoud; Romero Durán, David; Fabró Tàpia, Ferran (2016)
      Conference report
      Open Access
      On April 2015 a Lightning Mapping Array network (COL-LMA) was installed at the north of Colombia. This network provides 3D mapping of the development of lightning leaders. For the first time such network has been setup in ...
    • High spectral resolution spectroscopy of sprites: A natural probe of the mesosphere 

      Gordillo Vázquez, Francisco; Passas, Maria; Luque, Alejandro; Sánchez, Justo; Van der Velde, Oscar Arnoud; Montañá Puig, Juan (2018-02-06)
      Article
      Open Access
      We present the first high spectral resolution (0.24 nm) spectra of sprites. These spectra were recorded in Europe in the summers and falls of 2015 and 2016 and during January 2017. The use of high-spectral resolution has ...
    • High-resolution spectra of sprites and halos with GRASSP 

      Gordillo Vázquez, Francisco; Passas, Maria; Sánchez, Justo; Pérez Invernón, F. J.; Luque, Alejandro; Van der Velde, Oscar Arnoud; Montañá Puig, Juan (2017)
      Conference report
      Open Access
      The first and simultaneous spectroscopic campaigns of TLEs were carried out in the mid 1990s [1, 2], soon after the discovery of TLEs in 1989 [3]. These initial campaigns provided preliminary results on the optical emissions ...
    • High-speed observations of transient luminous events and lightning (The 2008/2009 Ebro Valley campaign) 

      Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Soula, Serge; Romero Durán, David; Pineda Rüegg, Nicolau; Solà de las Fuentes, Glòria; March Nomen, Víctor (2010)
      Conference lecture
      Restricted access - author's decision
    • High-speed video of lightning and x-ray pulses during the 2009–2010 observation campaigns in northeastern Spain 

      Montañá Puig, Juan; Van der Velde, Oscar Arnoud; March Nomen, Víctor; Romero Durán, David; Solà de las Fuentes, Glòria; Pineda Rüegg, Nicolau (2012-11-01)
      Article
      Restricted access - publisher's policy
      This paper summarizes results obtained by the 2009–2010 field campaigns conducted in northeastern Spain using a high speed camera, VHF interferometer, VLF lightning location system and scintillation detectors for energetic ...
    • High-speed video recordings of lightning, electric fields and high-energy detections during thunderstorms in Catalonia Spain 

      Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Romero Durán, David; Pineda Rüegg, Nicolau; Betz, H.D.; March Nomen, Víctor; Solà de las Fuentes, Glòria (2010)
      Conference lecture
      Open Access
      High-speed video recordings of natural lightning flashes show amazing details of this phenomenon. The paper summarizes the results of the 2009 measurement campaign where the combination of electric fields, total ...