Browsing by Author "Lopez, Javier"
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Item A case of winter lightning initiation from a tall structure in the Basque Country(Institute of Electrical and Electronics Engineers Inc., 2017-02-07) Lopez, Javier; Montanya, Joan; Maruri, Mercedes; Aranda, Jose Antonio; Gaztelumendi, Santiago; Centros PRE-FUSION TECNALIA - (FORMER); WEATHER AND CLIMATE INTELLIGENCE FOR BUSINESSLightning research is usually focused on the most active months of the year, those corresponding to the summer season. These thunderstorms produce most of the lightning records during a year in the Basque Country, and they are recorded for further research. In this paper winter lightning is under study. After the dramatic descent in the number of strokes recorded with the end of the summer season, a number of winter thunderstorms crossed the territory. Two different episodes (one in November 7th and 8th 2009, and a thunderstorm in November 30th 2009) left evidence of lightning in the weather radar tower located at Kapildui Mountain. In this paper the research carried out from the first evidence of electrical activity in the tower to the final conclusions of being upward negative flashes initiated by the tower is presented.Item Complete description of a heavy hailstorm over the Basque Country providing a 3D representation of lightning detections and weather radar data(2012) Hernaez, Inigo; Lopez, Javier; Centros PRE-FUSION TECNALIA - (FORMER)This paper presents a complete study of a heavy hailstorm episode over the Basque Country using total lightning detection, rain gauge data and weather radar data. This hailstorm left 115 mm of precipitation in one hour in a reduced area. The reflectivity data provided by the dual polarization Doppler weather radar operated by the Basque Meteorology Agency (Euskalmet) showed maximums over 60 dBz and total lightning detection performed by two independent lightning detection networks provided accurate data. In this paper, a description of the meteorological conditions leading to the formation of the hailstorm is provided. Data integration schemes and 3D representations of 10-minute ECHOTOP radar products and the associated lightning activity over Google Earth are presented for an accurate description of the episode.