Now showing items 1-12 of 55

    • 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)
      Article
      Open Access
      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)
      Article
      Open Access
      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)
      Article
      Open Access
      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)
      Article
      Open Access
      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
      Open Access
      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 ...
    • Assessing users’ perception on the current and potential educational value of an electrical engineering YouTube channel 

      Lijo, Ruben; Quevedo, Eduardo; Castro, Jose Juan; Horta Bernús, Ricard (Institute of Electrical and Electronics Engineers (IEEE), 2022)
      Article
      Open Access
      Full comprehension of abstract concepts present in engineering education has been usually considered challenging. Engaging multimedia resources have proven to be useful pedagogical aids to increase students’ motivation. ...
    • Optical signatures associated with streamers and leaders of laboratory discharges 

      Sousa Arcanjo, Marcelo Augusto; Montañá Puig, Juan; Urbani, Michele; Lorenzo, Victor (2021-10-28)
      Article
      Open Access
      This work investigates the strongest optical emissions associated with long laboratory sparks (at the wavelengths of 337 nm and 777 nm) with the aim to understand similar emissions in lightning. The processes of the ...
    • A simultaneous observation of lightning by ASIM, Colombia-Lightning Mapping Array, GLM, and ISS-LIS 

      Montañá Puig, Juan; López Trujillo, Jesús Alberto; Morales Rodríguez, Carlos Augusto; Van der Velde, Oscar Arnoud; Fabró Tàpia, Ferran; Pineda, Nicolau; Navarro González, Javier; Reglero, Víctor; Neubert, Torsten; Chanrion, Olivier; Goodman, Steven J.; Østgaard, Nikolai; Ladino Rincón, Alfonso; Romero Durán, David; Solà de las Fuentes, Glòria; Horta Bernús, Ricard; Freijo Álvarez, Modesto (2021-02-17)
      Article
      Open Access
      The Atmosphere-Space Interactions Monitor (ASIM) on the International Space Station (ISS) provides optical radiances and images of lightning flashes in several spectral bands. This work presents a lightning flash simultaneously ...
    • Thunderstorm charge structures favouring cloud-to-ground lightning 

      Salvador Yuste, Albert; Pineda Rüegg, Nicolau; Montañá Puig, Juan; Solà de las Fuentes, Glòria (2021-08)
      Article
      Restricted access - publisher's policy
      Thunderstorm electrical structures favouring cloud-to-ground lightning were investigated through a Lightning Mapping Array (LMA), an accurate three-dimensional lightning location system that allows inferring the heights ...
    • High-energy radiation from natural lightning observed in coincidence with a VHF broadband interferometer 

      Urbani, Michele; Montañá Puig, Juan; Van der Velde, Oscar Arnoud; López Trujillo, Jesús Alberto; Sousa Arcanjo, Marcelo Augusto; Fontanes Molina, Pol; Romero Durán, David; Roncancio Guzmán, José Andrés (2021-04-16)
      Article
      Open Access
      This work presents the first simultaneous X-ray measurements from natural lightning in coincidence with a very high frequency (VHF) broadband interferometer. During an observational campaign in north-central Colombia, five ...
    • Comparison of high-speed optical observations of a lightning flash from space and the ground 

      Van der Velde, Oscar Arnoud; Montañá Puig, Juan; Neubert, Torsten; Chanrion, Olivier; Ostgaard, N.; López Trujillo, Jesús Alberto; Fabró Tàpia, Ferran; Reglero Velasco, Victor (2020-10)
      Article
      Open Access
      We analyze a nighttime negative cloud-to-ground lightning flash in Colombia observed from the ground with a high-speed camera at 5,000 images per second and from space by the Atmosphere-Space Interactions Monitor (ASIM) ...
    • Seasonal variations on the conditions required for the lightning production 

      Salvador Yuste, Albert; Pineda Rüegg, Nicolau; Montañá Puig, Juan; Solà de las Fuentes, Glòria (2020-10-01)
      Article
      Restricted access - publisher's policy
      Given the growing concern on lightning threats outside the main warm-season, the objective of this study is to get further insight on the seasonal variations of the necessary conditions required for the production of ...