Enviaments recents

  • Spectroscopy of a mesospheric ghost reveals iron emissions 

    Passas, Maria; Van der Velde, Oscar Arnoud; Gordillo Vázquez, Francisco; Gómez-Martín, Juan Carlos; Sánchez, Justo; Pérez Invernón, Francisco José; Sánchez-Ramírez, Rubén; García Comas, Maia; Montañá Puig, Juan (2023-12-12)
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    Accés obert
    Mesospheric Green emissions from excited Oxygen in Sprite Tops (ghosts) are infrequent and faint greenish transient luminous events that remain for hundreds of milliseconds on top of certain energetic sprites. The main ...
  • 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)
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    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 ...
  • Impact of electrical engineering didactic videos during emergency remote learning 

    Lijo, Ruben; Quevedo, Eduardo; Castro, Jose Juan; Horta Bernús, Ricard (Institute of Electrical and Electronics Engineers (IEEE), 2023)
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    Accés obert
    This article demonstrates that didactic videos have the potential to enhance quality perception, performance and interest in engineering education. Emergency Remote Learning (ERL) imposed challenging conditions on education, ...
  • Upward propagation of gigantic jets revealed by 3D radio and optical mapping 

    Boggs, Levi D.; Mach, Doug; Bruning, Eric; Liu, Ningyu; Van der Velde, Oscar Arnoud; Montanya Puig, Joan; Cummer, Steven A.; Palivec, Kevin; Chmielewski, Vanna; MacGorman, Donald R.; Peterson, Michael J. (2022-08-05)
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    Accés obert
    Occasionally, lightning will exit the top of a thunderstorm and connect to the lower edge of space, forming a gigantic jet. Here, we report on observations of a negative gigantic jet that transferred an extraordinary amount ...
  • Estudio de la accidentabilidad de la minería española en el período 2010-2019 

    Sanmiquel Pera, Lluís; Bascompta Massanes, Marc; Freijo Álvarez, Modesto; Vintró Sánchez, Carla; Felipe Blanch, José Juan de (2022-10-26)
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    Accés obert
  • Potential use of space-based lightning detection in 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; Saba, Manuel; Goodman, Steven J.; Williams, Earle R.; Peterson, Michael J.; Pineda, Nicolau; Sousa Arcanjo, Marcelo Augusto; Aranguren Fino, Daniel (2022-12)
    Article
    Accés obert
    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 ...
  • 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)
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    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, ...
  • New WMO certified megaflash lightning extremes for flash distance (768 km) and duration (17.01 seconds) recorded from space 

    Peterson, Michael J.; Lang, Timothy J.; Logan, Timothy; Wee Kiong, Cheong; Gijben, Morne; Holle, Ronald L.; Kolmasova, Ivana; Marisaldi, Martino; Montañá Puig, Juan; Pawar, Suwil D.; Zhang, Daile; Brunet, Manola; Cerveny, Randall S. (American Meteorological Society, 2022-02-01)
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    Accés obert
    Initial global extremes in lightning duration and horizontal distance were established in 2017 (Lang et al. 2017) by an international panel of atmospheric lightning scientists and engineers assembled by the WMO. The ...
  • 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)
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    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 ...
  • Tropical TGF paradox: a perspective from TRMM precipitation radar 

    Morales Rodríguez, Carlos Augusto; Montanya Puig, Joan; Van der Velde, Oscar Arnoud; Fabró Tàpia, Ferran; López Trujillo, Jesús Alberto (2021-07-27)
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    Accés obert
    The Terrestrial Gamma-ray Flash (TGF) to lightning ratio, computed over the three tropical chimneys, presents a paradox: African thunderstorms produce the most lightning but yield the lowest fraction of TGFs when compared ...
  • 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)
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    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 ...
  • 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 ...

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