Now showing items 21-40 of 44

  • 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 Ruegg, Nicolau; Betz, H.D.; March Nomen, Víctor; Solà de Las Fuentes, Gloria (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 ...
  • 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 (2010)
    Conference lecture
    Restricted access - author's decision
    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
    Restricted access - publisher's policy
    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, Gloria; Fabró Tàpia, Ferran; Romero Durán, David; Pineda Ruegg, Nicolau; Argemí Ribera, Oriol (2014)
    Conference report
    Restricted access - publisher's policy
    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 Ruegg, Nicolau (2012)
    Lecture
    Restricted access - author's decision
  • Observation and properties of a sub-cloud bidirectional leader 

    Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Williams, Earle R.; Pineda Ruegg, Nicolau; Romero Durán, David (2014)
    Conference report
    Open Access
    In this paper we present the evolution of a bidirectional leader which appeared in ‘virgin’ air. In the observations we did not find any delay between the onsets of the two leader ends. The positive leader end presented a ...
  • Observations of Western Mediterranean TLE: LS8000 intracloud lightning and high-speed video 

    Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Romero Durán, David; Soula, Serge; Pineda Ruegg, Nicolau; Bech, Joan; Reglero, V. (2009)
    Conference lecture
    Restricted access - author's decision
    Transient luminous events (TLE) are electrical phenomena occurring between the ionosphere and the tops of thunderstorms. First discovered in 1989, the family of TLE now consists of different members: sprites, sprite ...
  • Registration of X-rays at 2500 m altitude in association with lightning flashes and thunderstorms 

    Montañá Puig, Juan; Fabró Tàpia, Ferran; Van der Velde, Oscar Arnoud; Romero Durán, David; Solà de Las Fuentes, Gloria; Hermoso Costa, Juan Ramón; Soula, Serge; Williams, Earle; Pineda Ruegg, Nicolau (2014)
    Article
    Open Access
    Electric fields and high-energy radiation of natural lightning measured at close range from a mountaintop tower are discussed. In none of the 12 negative cloud-to-ground upward flashes were X-rays observed. Also no energetic ...
  • Relativistic electron beams above thunderclouds 

    Neubert, Torsten; Pasko, V.P.; Bennet, A. J.; Fullekrug, Martin; Roussel Dupré, Robert; Symbalisty, Eugene M. D.; Colman, J.J.; Chanrion, Olivier; Soula, Serge; Van der Velde, Oscar Arnoud; Odzimek, Anna (2011)
    Article
    Open Access
    Non-luminous relativistic electron beams above thunderclouds have been detected by the radio signals of low frequency ~ 40–400 kHz which they radiate. The electron beams occur ~ 2–9 ms after positive cloud-to-ground lightning ...
  • Sprites and elves as proxy of energetic lightning flashes in winter: what can we learn from mesospheric discharges for the protection of wind turbines? 

    Montañá Puig, Juan; Fabró Tàpia, Ferran; Van der Velde, Oscar Arnoud; Hermoso, Blas (2011)
    Conference report
    Open Access
    Sprites and Elves are commonly observed in Europe, especially also in winter maritime storms. It is well known that sprites are related to large electric charge positive flashes and elves are related with high amplitude ...
  • Study of the total lightning activity in a hailstorm 

    Montañá Puig, Juan; Soula, Serge; Pineda Ruegg, Nicolau; Van der Velde, Oscar Arnoud; Clapers, Pere; Solà de Las Fuentes, Gloria; Bech, Joan; Romero Durán, David (2007)
    Conference lecture
    Restricted access - author's decision
    A thunderstorm which developed in North-Eastern region of Spain on 16th June, 2006 is analyzed. This thunderstorm could be severe because it produced hailstones larger than 19 mm. The cell life time was 3h 30 minutes. ...
  • Study of the total lightning activity in a hailstorm 

    Montañá Puig, Juan; Soula, Serge; Pineda, Nicolau; Van der Velde, Oscar Arnoud; Clapers, Pere; Solà de Las Fuentes, Gloria; Bech, Joan; Romero Durán, David (2009)
    Article
    Restricted access - author's decision
    A thunderstorm that developed over northeastern Spain on 16 June 2006 is analyzed. This severe thunderstorm produced hailstones as large as 40 mm and had a lifetime of 3 h and 30 min. Radar cross-sections show strong ...
  • Temporal and spatial evolution of intracloud lightning associated ith sprite-producing positive cloud-to-ground flashes in Northeastern Spain 

    Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Soula, Serge; Pineda Ruegg, Nicolau; Chanrion, Olivier (2009)
    Conference lecture
    Restricted access - author's decision
  • The start of lightning: evidence of bidirectional lightning initiation 

    Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Williams, Earle R. (Macmillan Publishers, 2015-10-18)
    Article
    Open Access
    Lightning flashes are known to initiate in regions of strong electric fields inside thunderstorms, between layers of positively and negatively charged precipitation particles. For that reason, lightning inception is ...
  • Time and space correlation between sprites and their parent lightning flashes for a thunderstorm observed during the HyMeX campaign 

    Soula, Serge; Defer, E.; Fullekrug, Martin; Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Bousquet, O.; Mlynarczyk, Janusz; Coquillat, S.; Pinty, J.P.; Rison, William; Krehbiel, P.; Thomas, R.; Pedeboy, S. (American Geophysical Union (AGU), 2015-11-27)
    Article
    Restricted access - publisher's policy
  • Total lightning analysis of a tornadic severe weather event 

    Pineda Ruegg, Nicolau; Bech, Joan; Rigo, Tomeu; Montañá Puig, Juan; Van der Velde, Oscar Arnoud (2009)
    Conference lecture
    Restricted access - author's decision
    This study presents an analysis of total lightning and radar data of a severe weather event that took place in the early morning of 2nd November 2008 in Catalonia (NE Spain). A general overview of the synoptic framework ...
  • Total lightning detections of lightning flashes recorded by means of high-speed videos 

    Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Romero Durán, David; March Nomen, Víctor; Solà de Las Fuentes, Gloria; Pineda Ruegg, Nicolau (2011)
    Conference report
    Restricted access - author's decision
    A detailed analysis of two lightning flashes is presented. High speed video, total lightning detections and electric field measurements are the basis of the study. In general, the observed negative cloud-to-ground ...
  • Total lightning in a TLE-bearing Winter thunderstorm over the Western Mediterranean 

    Pineda Ruegg, Nicolau; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Soula, Serge (2008)
    Conference lecture
    Restricted access - author's decision
    In this paper we present the analysis of one specific thunderstorm, which occurred during the night of 17th to 18th December 2007 in the western Mediterranean Sea, in the coastal area of Catalonia (NE Spain) (Fig.1).
  • Total lightning observations to wind turbines 

    Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Romero Durán, David; March Nomen, Víctor; Solà de Las Fuentes, Gloria; Pineda Ruegg, Nicolau; Hermoso Alameda, Blas; Senosiáin Miquélez, Vicente (2012)
    Conference report
    Restricted access - publisher's policy
    In summer 2011 a new VHF Lightning Mapping Array was installed at the northeast of Spain. In that area a VHF interferometer and a VLFILF lightning detection networks are also operative. The close presence of wind farms in ...
  • Turbines shoot upside-down lightning 

    Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Williams, Earle (2014-02-20)
    Article
    Open Access
    Wind turbines emit lightning flashes upwards, producing these electrical discharges at regular intervals relative to the turbine’s rotation, and can do so tens of kilometres away from an active thunderstorm area.