Ara es mostren els items 1-20 de 22

    • A mediterranean nocturnal heavy rainfall and tornadic event. Part I: overview, damage survey and radar analysis 

      Van der Velde, Oscar Arnoud; Bech, Joan; Pineda Rüegg, Nicolau; Rigo, Tomeu; Aran, Montserrat; Amaró, Jésica; Gayà, M; Arús, J; Montañá Puig, Juan (2011-01-03)
      Article
      Accés restringit per política de l'editorial
      This study presents an analysis of a severe weather case that took place during the early morning of the 2nd of November 2008, when intense convective activity associated with a rapidly evolving low pressure system affected ...
    • A mediterranean nocturnal heavy rainfall and tornadic event. Part II: total lightning analysis 

      Pineda Rüegg, Nicolau; Bech, Joan; Rigo, Tomeu; Montañá Puig, Juan (2010-11-09)
      Article
      Accés restringit per política de l'editorial
      On the night from 1st to 2nd of November 2008, a multi-cell storm coming from the Mediterranean produced severe weather in the coastal area of Catalonia (NE Spain): groundlevel strong damaging wind gusts, a tornado – ...
    • A new methodology to characterise the radar bright band using doppler spectral moments from vertically pointing radar observations 

      Garcia Benadí, Albert; Bech, Joan; González Herrero, Sergi; Udina, Mireia; Codina Sánchez, Bernat (Multidisciplinary Digital Publishing Institute (MDPI), 2021-10-27)
      Article
      Accés obert
      The detection and characterisation of the radar Bright Band (BB) are essential for many applications of weather radar quantitative precipitation estimates, such as heavy rainfall surveillance, hydrological modelling or ...
    • A study of thunderstorm characteristics using lightning and weather radar observations 

      Pineda Rüegg, Nicolau; Bech, Joan; Rigo, Tomeu; Montañá Puig, Juan (2004)
      Comunicació de congrés
      Accés restringit per decisió de l'autor
      The main objective of this study was to give insight into the temporal and spatial aspects of lightning activity during the life cycle of diverse types of thunderstorms, and to examine the possible relationships with ...
    • Alternative processing for micro rain radar (MRR) observations 

      Garcia Benadí, Albert; Bech, Joan; González Herrero, Sergi; Río Fernandez, Joaquín del (2018)
      Comunicació de congrés
      Accés obert
      The most common function of weather radars is to provide a description of the precipitation field, typically in four dimensions: temporal evolution of a 3D field, including characteristics of precipitation and rainfall ...
    • An observational description of a tornadic severe weather event 

      Bech, Joan; Pineda Rüegg, Nicolau; Aran, M; Amaro, J; Gayà, M; Arús, J; Montañá Puig, Juan; Van der Velde, Oscar Arnoud (2009)
      Comunicació de congrés
      Accés restringit per decisió de l'autor
      This study presents an analysis of a severe weather case study that took place during the early morning of the 2nd of November 2008, when intense convective activity associated to a rapidly evolving low pressure system ...
    • Analysis of lightning associated with a sprite displaced from its parent positive cloud to ground lightning flash 

      Montañá Puig, Juan; Van der Velde, Oscar Arnoud; Soula, Serge; Neubert, Torsten; Bech, Joan; Mika, Agnes (2007)
      Comunicació de congrés
      Accés restringit per decisió de l'autor
    • Analysis of the electric field changes due to lightning during Catalonia thunderstorms in Summer 2003 

      Montañá Puig, Juan; Bergas Jané, Joan Gabriel; Pineda Rüegg, Nicolau; Bech, Joan; Rigo, Tomeu; Illa Arnau, Àngel; Hermoso Alameda, Blas (2004)
      Comunicació de congrés
      Accés restringit per decisió de l'autor
      Electric fields related to lightning close to storms were measured in the Catalonian region (NE of Spain) in summer 2003. The aim of this campaign was the data collection to study the total electrical charge involved in ...
    • 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)
      Comunicació de congrés
      Accés restringit per decisió de l'autor
      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 ...
    • Meteorological aspects of winter upward lightning from an instrumented tower in the Pyrenees 

      Pineda, Nicolau; Montanya, Joan; Romero Durán, David; Bech, Joan; González Lopez, Sergio (Institute of Electrical and Electronics Engineers (IEEE), 2018)
      Text en actes de congrés
      Accés obert
      A case study of winter upward lightning is analysed. In particular, the study focuses on the meteorological aspects that favoured the triggering of upward lightning by an instrumented tower in the eastern Pyrenees. Starting ...
    • Multiple characteristics of precipitation inferred from wind profiler radar Doppler spectra 

      Garcia Benadí, Albert; Bech, Joan; Udina Sistach, Mireia; Campistron, B.; Paci, Alexandre (Multidisciplinary Digital Publishing Institute (MDPI), 2022-10-09)
      Article
      Accés obert
      A methodology to process radar wind profiler Doppler spectra is presented and implemented for an UHF Degreane PCL1300 system. First, double peak signal detection is conducted at each height level and, then, vertical ...
    • 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 Rüegg, Nicolau; Bech, Joan; Reglero, V. (2009)
      Comunicació de congrés
      Accés restringit per decisió de l'autor
      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 ...
    • On the observed connection between Arctic sea ice and Eurasian snow in relation to the winter North Atlantic Oscillation 

      Santolaria-Otín, María; García Serrano, Javier; Ménégoz, Martin; Bech, Joan (IOP Publishing, 2020)
      Article
      Accés obert
      Sea ice concentration (SIC) in the eastern Arctic and snow cover extent (SCE) over central Eurasia in late autumn have been proposed as potential predictors of the winter North Atlantic Oscillation (NAO). Here, maximum ...
    • Precipitation type classification of micro rain radar data using an improved doppler spectral processing methodology 

      Garcia Benadí, Albert; Bech, Joan; González Herrero, Sergi; Udina, Mireia; Codina Sánchez, Bernat; Georgis, Jean-François (Multidisciplinary Digital Publishing Institute (MDPI), 2020-12-16)
      Capítol de llibre
      Accés obert
      This paper describes a methodology for processing spectral raw data from Micro Rain Radar (MRR), a K-band vertically pointing Doppler radar designed to observe precipitation profiles. The objective is to provide a set of ...
    • Predictability assessment of nowcasts in high-impact heavy precipitation events 

      Bech, Joan; Berenguer Ferrer, Marc (2012)
      Comunicació de congrés
      Accés obert
    • Skill in nowcasting high-impact heavy precipitation events 

      Bech, Joan; Berenguer Ferrer, Marc (2014)
      Comunicació de congrés
      Accés obert
      The objective of this study is to assess the skill of a precipitation nowcasting (very short range forecasting) system, with particular emphasis on hig-impact Heavy Precipitation Events (HPE). A threshold amount of 20 mm ...
    • Stratiform and convective rain classification using machine learning models and micro rain radar 

      Ghada, Wael; Casellas Masana, Enric; Herbinger, Julia; Garcia Benadí, Albert; Bothmann, Ludwig; Estrella, Nicole; Bech, Joan; Menzel, Annette (Multidisciplinary Digital Publishing Institute (MDPI), 2022-09-13)
      Article
      Accés obert
      Rain type classification into convective and stratiform is an essential step required to improve quantitative precipitation estimations by remote sensing instruments. Previous studies with Micro Rain Radar (MRR) measurements ...
    • Study of the total lightning activity in a hailstorm 

      Montañá Puig, Juan; Soula, Serge; Pineda Rüegg, Nicolau; Van der Velde, Oscar Arnoud; Clapers, Pere; Solà de las Fuentes, Glòria; Bech, Joan; Romero Durán, David (2007)
      Comunicació de congrés
      Accés restringit per decisió de l'autor
      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, Glòria; Bech, Joan; Romero Durán, David (2009)
      Article
      Accés restringit per decisió de l'autor
      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 ...
    • Total lightning analysis of a tornadic severe weather event 

      Pineda Rüegg, Nicolau; Bech, Joan; Rigo, Tomeu; Montañá Puig, Juan; Van der Velde, Oscar Arnoud (2009)
      Comunicació de congrés
      Accés restringit per decisió de l'autor
      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 ...