Analysis of energetic radiation associated with thunderstorms in the Ebro delta region in Spain
The analysis of high-energy background radiation (0.1 – 2 MeV) enhancements during eight winter thunderstorms and ¿ve summer storms in the Ebro delta region in the northeast of Spain is presented. For the ¿rst time, high-energy radiation counts, precipitation, radar re¿ectivity, and very high freque...
| Autores: | , , , , , , |
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| Tipo de recurso: | artículo |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/98326 |
| Acceso en línea: | https://hdl.handle.net/2117/98326 https://dx.doi.org/10.1002/2015JD024573 |
| Access Level: | acceso abierto |
| Palabra clave: | Atmospheric radiation TGF TGE Terrestrial Gamma ray Flash Terrestrial Ground Enhancements Background radiation X-rays Thunderstorms Lightning Lightning Mapping Array Radon Rain Precipitation Radar Radiació atmosfèrica Àrees temàtiques de la UPC::Enginyeria elèctrica |
| Sumario: | The analysis of high-energy background radiation (0.1 – 2 MeV) enhancements during eight winter thunderstorms and ¿ve summer storms in the Ebro delta region in the northeast of Spain is presented. For the ¿rst time, high-energy radiation counts, precipitation, radar re¿ectivity, and very high frequency lightning detections to infer charge regions altitude have been analyzed in order to ¿nd out what produces the measured background radiation increments associated with storms. The good agreement between radar re¿ectivity and precipitation with increases in background radiation counts coupled with the spectrum analysis comparing rain/no rain periods suggests that radon-ion daughters play a major role in the radiation increments reported. No evidence has been found supporting that measured background radiation enhancements can be produced by storm electric ¿elds. Finally, a single case of a high-energy radiation increase was prior to a cloud-to-ground lightning stroke, which reinforces the theory that a lower positive charge layer’s existence is important for the production of Terrestrial Ground Enhancements. |
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