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Ara es mostren els items 41-60 de 92

    • 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)
      Text en actes de congrés
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      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)
      Comunicació de congrés
      Accés restringit per decisió de l'autor

    • 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
      Accés restringit per política de l'editorial
      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)
      Comunicació de congrés
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      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 ...

    • Initiation of lightning flashes simultaneously observed from space and the ground: Narrow bipolar events 

      López Trujillo, Jesús Alberto; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Romero Durán, David; Gordillo Vázquez, Francisco; Pérez Invernón, Francisco José; Luque Estepa, Alejandro; Morales Rodríguez, Carlos Augusto; Neubert, Torsten; Rison, William; Krehbiel, P.; Navarro González, Javier; Østgaard, Nikolai; Reglero, Víctor (2022-04-15)
      Article
      Accés obert
      We investigate the initiation of four lightning flashes detected from ground by means of the Colombia Lightning Mapping Array (Colombia-LMA) and simultaneously observed from space by the optical sensors of the Atmosphere-Space ...

    • Lightning attachement test on a scale aircraft model as subject for educational purposes 

      Romero Durán, David; March Nomen, Víctor; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Solà de las Fuentes, Glòria (2010)
      Comunicació de congrés
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      A new subject on lightning protection of aircraft has been developed at the Technical University of Catalonia. This elective subject is implemented according to project-based learning (PBL). In this way, during the ...

    • Lightning development associated with two negative gigantic jets 

      Rutledge, Steven A.; Lang, Timothy J.; Cohen, Morris B.; Van der Velde, Oscar Arnoud; MacGorman, Donald R.; Beasley, William; Stanley, Mark A.; Lu, Gaopeng; Cummer, Steven A.; Lyons, Walter A.; Krehbiel, Paul R.; Li, Jingbo; Rison, William; Thomas, Ronald J.; Edens, Harald E. (2011-06-21)
      Article
      Accés restringit per política de l'editorial
      We report observations of two negative polarity gigantic jets sufficiently near very high‐frequency (VHF) lightning mapping networks that the associated lightning characteristics and charge transfer could be investigated. ...

    • Lightning flash properties derived from lightning mapping array data 

      Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Solà de las Fuentes, Glòria; Fabró Tàpia, Ferran; Romero Durán, David; Pineda Ruegg, Nicolau; Argemí Ribera, Oriol (2014)
      Text en actes de congrés
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      in this paper size and duration of lightning flashes are examined. Data from the Ebro Valley Laboratory Lightning Mapping Array is used as reference. Additional data from the VLF/LF LINET network and meteorological radar ...

    • Lightning Mapping Array in Ebre’s Delta: campaign 2011 results. Comparison with other LLS 

      Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Pineda Rüegg, Nicolau (2012)
      Presentació
      Accés restringit per decisió de l'autor

    • Lightning mapping observations of downward lightning flashes to wind turbines 

      Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Domingo Dalmau, Anna; Pineda Rüegg, Nicolau; Argemí Ribera, Oriol; Salvador Yuste, Albert (Zakon Group, 2016)
      Text en actes de congrés
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      Negative downward leaders that produced lightning strokes to wind turbines are identified by means of the Lightning Mapping Array data of the Ebro Valley Laboratory (NE Spain). Four cases are analyzed together with weather ...

    • Lightning-ignited wildfires and long continuing current lightning in the Mediterranean Basin: Preferential meteorological conditions 

      Pérez Invernón, Francisco José; Huntrieser, Heidi; Soler López, Sergio; Gordillo Vázquez, Francisco; Pineda, Nicolau; Navarro González, Javier; Reglero, Víctor; Montanya Puig, Joan; Van der Velde, Oscar Arnoud; Koutsias, Nikos (European Geosciences Union (EGU), 2021-12-02)
      Article
      Accés obert
      Lightning is the major cause of the natural ignition of wildfires worldwide and produces the largest wildfires in some regions. Lightning strokes produce about 5¿% of forest fires in the Mediterranean Basin and are one of ...

    • Lightning-produced nitrogen oxides per flash length obtained by using TROPOMI observations and the Ebro lightning mapping array 

      Pérez Invernón, Francisco José; Gordillo Vázquez, Francisco; Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Pineda Rüegg, Nicolau; López Trujillo, Jesús Alberto; Huntrieser, Heidi; Valks, Pieter; Loyola, Diego; Sero, Sora; Erbertseder, Thilo (2023-12-28)
      Article
      Accés obert
      Lightning is one of the main sources of NOx in the Earth's atmosphere. However, there is a large variability in NOx production during the lifetime of thunderstorms. In this study, we used the TROPOspheric Monitoring ...

    • LMA observation of upward flashes at Säntis Tower: preliminary result 

      Mostajabi, A.; Pineda Rüegg, Nicolau; Romero Durán, David; Azadifar, M.; Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Rubinstein, M.; Rachidi, F (2018)
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      Lightning striking tall towers is mainly of the upward lightning type, which is characterized by the absence of a first return stroke and the presence of an initial continuous current (ICC) with or without superimposed ...

    • LMA observations of upward lightning flashes at the Säntis Tower initiated by nearby lightning activity 

      Sunjerga, A.; Rubinstein, M.; Pineda, Nicolau; Mostajabi, A.; Azadifar, M.; Romero Durán, David; Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Figueras i Ventura, Jordi; Besic, Nikola; Grazioli, Jacopo; Hering, Alessandro; Germann, Urs; Diendorfer, Gerhard; Rachidi-Haeri, Farhad (2020-04)
      Article
      Accés obert
      We present in this paper lightning current measurements, LMA (Lightning Mapping Array) data and fast antenna electric fields associated with upward flashes observed at the Säntis Tower during summer of 2017. The LMA network ...

    • Measurement of electric potential of isolated vertical conductive wires pulled by a drone under fair weather conditions 

      Montañá Puig, Juan; March Nomen, Víctor; Van der Velde, Oscar Arnoud; López Trujillo, Jesús Alberto; Romero Durán, David; Fontanes Molina, Pol; Urbani, Michele (2018)
      Comunicació de congrés
      Accés restringit per política de l'editorial
      The popularization of multicopter drones opens new possibilities for investigations of the atmospheric potential. The method of directly measuring of the electric potential drop of the lower part of the atmosphere has been ...

    • Meteorological aspects of self-initiated upward lightning at the Säntis Tower (Switzerland) 

      Pineda, Nicolau; Figueras i Ventura, Jordi; Romero Durán, David; Mostajabi, A.; Azadifar, M.; Sunjerga, A.; Rachidi-Haeri, Farhad; Rubinstein, M.; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Altube Vázquez, Patricia; Besic, Nikola; Grazioli, Jacopo; Germann, Urs; Williams, Earle R. (2019-12-26)
      Article
      Accés obert
      Interest in exploring the meteorological conditions favoring upward lightning from tall man-made structures has grown in recent years, largely due to the worldwide expansion of wind energy. To this end, instrumented towers ...

    • Meteorological factors in the production of gigantic jets by tropical thunderstorms in Colombia 

      Van der Velde, Oscar Arnoud; Montanya Puig, Joan; López Trujillo, Jesús Alberto (2022-10-15)
      Article
      Accés obert
      Gigantic jets are electric discharges that on rare occasions can be seen at night shooting out of the top of tropical thunderclouds, reaching the ionosphere (90 km). Using sensitive camera systems and detection software, ...

    • Multi-instrumental analysis of large sprite events and of their producing storm in southwestern France 

      Soula, Serge; Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Fullekrug, Martin; Farges, Thomas; Bór, József; Iacovella, F.; Georgis, Jean-Francois; Naitamor, S.; Martin, J.-M. (Elsevier, 2011)
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      During the night of 01-02 September, 2009, several TLEs including 3 halos and 16 distinct sprites were observed above a storm in north-western Mediterranean Sea with a camera at Pic du Midi (42.93° N, 0.14° E, 2877 m). ...

    • Multi-stroke positive cloud-to-ground lightning sharing the same channel observed with a VHF broadband interferometer 

      Urbani, Michele; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Sousa Arcanjo, Marcelo Augusto; López Trujillo, Jesús Alberto (2022-04-15)
      Article
      Accés obert
      In the same lightning flash, whose usual duration is less than a second, there can be multiple negative cloud-to-ground strokes with different terminations or following a preexisting channel to the ground. In contrast, it ...

    • New era of lightning detection from space: application to electric power systems 

      Montañá Puig, Juan; López Trujillo, Jesús Alberto; Van der Velde, Oscar Arnoud; Solà de las Fuentes, Glòria; Romero Durán, David; Morales Rodríguez, Carlos Augusto; Visacro, Silverio; Goodman, Steven J.; Williams, Earle Rolfe; Peterson, Michael J.; Pineda Rüegg, Nicolau; Sousa Arcanjo, Marcelo Augusto; Aranguren Fino, Harby Daniel (2021)
      Text en actes de congrés
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      Information about lightning activity and its parameters is necessary to design and evaluate the lightning protection of an electrical power system. This information can be obtained from ground-based lightning detection ...