Narrow bipolar events study based on broadband observations
ilustraciones, fotografías a color
- Autores:
-
Díaz Ortiz, Fernando Augusto
- Tipo de recurso:
- Doctoral thesis
- Fecha de publicación:
- 2023
- Institución:
- Universidad Nacional de Colombia
- Repositorio:
- Universidad Nacional de Colombia
- Idioma:
- eng
- OAI Identifier:
- oai:repositorio.unal.edu.co:unal/83737
- Palabra clave:
- 550 - Ciencias de la tierra
Campos eléctricos
Campos electromagnéticos
Electric fields
Electromagnetic fields
Lightning
Narrow bipolar event
Narrow bipolar pulse
compact intracloud discharge
Interferometry
Rayos
Pulsos bipolares estrechos
Eventos bipolares estrechos
Interferometría
Descarga compacta intranube
- Rights
- openAccess
- License
- Atribución-NoComercial-CompartirIgual 4.0 Internacional
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oai:repositorio.unal.edu.co:unal/83737 |
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Universidad Nacional de Colombia |
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|
dc.title.eng.fl_str_mv |
Narrow bipolar events study based on broadband observations |
dc.title.translated.spa.fl_str_mv |
Estudio de pulsos bipolares estrechos basado en observaciones de banda ancha |
title |
Narrow bipolar events study based on broadband observations |
spellingShingle |
Narrow bipolar events study based on broadband observations 550 - Ciencias de la tierra Campos eléctricos Campos electromagnéticos Electric fields Electromagnetic fields Lightning Narrow bipolar event Narrow bipolar pulse compact intracloud discharge Interferometry Rayos Pulsos bipolares estrechos Eventos bipolares estrechos Interferometría Descarga compacta intranube |
title_short |
Narrow bipolar events study based on broadband observations |
title_full |
Narrow bipolar events study based on broadband observations |
title_fullStr |
Narrow bipolar events study based on broadband observations |
title_full_unstemmed |
Narrow bipolar events study based on broadband observations |
title_sort |
Narrow bipolar events study based on broadband observations |
dc.creator.fl_str_mv |
Díaz Ortiz, Fernando Augusto |
dc.contributor.advisor.none.fl_str_mv |
Román Campos, Francisco José |
dc.contributor.author.none.fl_str_mv |
Díaz Ortiz, Fernando Augusto |
dc.contributor.researchgroup.spa.fl_str_mv |
Compatibilidad electromagnética |
dc.contributor.orcid.spa.fl_str_mv |
0000-0002-7989-3475 |
dc.contributor.cvlac.spa.fl_str_mv |
https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=0000938440 |
dc.subject.ddc.spa.fl_str_mv |
550 - Ciencias de la tierra |
topic |
550 - Ciencias de la tierra Campos eléctricos Campos electromagnéticos Electric fields Electromagnetic fields Lightning Narrow bipolar event Narrow bipolar pulse compact intracloud discharge Interferometry Rayos Pulsos bipolares estrechos Eventos bipolares estrechos Interferometría Descarga compacta intranube |
dc.subject.lemb.spa.fl_str_mv |
Campos eléctricos Campos electromagnéticos |
dc.subject.lemb.eng.fl_str_mv |
Electric fields Electromagnetic fields |
dc.subject.proposal.eng.fl_str_mv |
Lightning Narrow bipolar event Narrow bipolar pulse compact intracloud discharge Interferometry |
dc.subject.proposal.spa.fl_str_mv |
Rayos Pulsos bipolares estrechos Eventos bipolares estrechos Interferometría Descarga compacta intranube |
description |
ilustraciones, fotografías a color |
publishDate |
2023 |
dc.date.accessioned.none.fl_str_mv |
2023-04-19T16:34:20Z |
dc.date.available.none.fl_str_mv |
2023-04-19T16:34:20Z |
dc.date.issued.none.fl_str_mv |
2023 |
dc.type.spa.fl_str_mv |
Trabajo de grado - Doctorado |
dc.type.driver.spa.fl_str_mv |
info:eu-repo/semantics/doctoralThesis |
dc.type.version.spa.fl_str_mv |
info:eu-repo/semantics/acceptedVersion |
dc.type.coar.spa.fl_str_mv |
http://purl.org/coar/resource_type/c_db06 |
dc.type.content.spa.fl_str_mv |
Text |
dc.type.redcol.spa.fl_str_mv |
http://purl.org/redcol/resource_type/TD |
format |
http://purl.org/coar/resource_type/c_db06 |
status_str |
acceptedVersion |
dc.identifier.uri.none.fl_str_mv |
https://repositorio.unal.edu.co/handle/unal/83737 |
dc.identifier.instname.spa.fl_str_mv |
Universidad Nacional de Colombia |
dc.identifier.reponame.spa.fl_str_mv |
Repositorio Institucional Universidad Nacional de Colombia |
dc.identifier.repourl.spa.fl_str_mv |
https://repositorio.unal.edu.co/ |
url |
https://repositorio.unal.edu.co/handle/unal/83737 https://repositorio.unal.edu.co/ |
identifier_str_mv |
Universidad Nacional de Colombia Repositorio Institucional Universidad Nacional de Colombia |
dc.language.iso.spa.fl_str_mv |
eng |
language |
eng |
dc.relation.references.spa.fl_str_mv |
T. J. Lang, S. Pédeboy, W. Rison, R. S. Cerveny, J. Montanyà, S. Chauzy, D. R. MacGorman, R. L. Holle, E. E. Ávila, Y. Zhang, G. Carbin, E. R. Mansell, Y. Kuleshov, T. C. Petersrson, M. Brunet, F. Driouech, and D. S. Krahenbuhl, “Wmo world record lightning extremes: Longest reported flash distance and longest reported flash duration,” Bulletin of the American Meteorological Society, vol. 98, pp. 1153–1168, 2017. J. R. Dwyer and M. a. Uman, “The physics of lightning,” Physics Reports, vol. 534, pp. 147–241, 10 2013. [Online]. Available: http://linkinghub.elsevier.com/retrieve/pii/S037015731300375X T. Warner, M. Saba, C. Schumann, J. H. Jr, and R. Orville, “Observations of bidirectional lightning leader initiation and development near positive leader channels,” Journal of Geophysical Research: Atmospheres, vol. 121, pp. 9251–9260, 2016. J. Montanyà, O. van der Velde, and E. R. Williams, “The start of lightning: Evidence of bidirectional lightning initiation,” Scientific Reports, vol. 5, p. 15180, 2015. [Online]. Available: http://www.nature.com/articles/srep15180 M. D. Tran and V. A. Rakov, “Initiation and propagation of cloud-to-ground lightning observed with a high-speed video camera,” Scientific Reports, vol. 6, pp. 1–11, 2016. [Online]. Available: http://dx.doi.org/10.1038/srep39521 W. Rison, P. R. Krehbiel, M. G. Stock, H. E. Edens, X.-M. Shao, R. J. Thomas, M. A. Stanley, and Y. Zhang, “Observations of narrow bipolar events reveal how lightning is initiated in thunderstorms,” Nature Communications, vol. 7, p. 10721, 2016. [Online]. Available: http://www.nature.com/doifinder/10.1038/ncomms10721 J. N. Tilles, N. Liu, M. A. Stanley, P. R. Krehbiel, W. Rison, G. Michael, J. R. Dwyer, R. Brown, and J. Wilson, “Fast negative breakdown in thunderstorms,” Nature Communications, pp. 1–12, 2018. [Online]. Available: http://dx.doi.org/10.1038/s41467-019-09621-z F. Shi, N. Liu, J. R. Dwyer, and K. M. Ihaddadene, “Vhf and uhf electromagnetic radiation produced by streamers in lightning,” Geophysical Research Letters, vol. 46, pp. 443–451, 2019 D. M. L. Vine, “Sources of the strongest rf radiation from lightning,” Journal of Geophysical Research, vol. 85, p. 4091, 1980. [Online]. Available: http://doi.wiley.com/10.1029/JC085iC07p04091 http://hdl.handle.net/2060/19790015388 D. L. Vine, “The spectrum of radiation from lightning,” 1980. A. F. Leal, V. A. Rakov, and B. R. P. Rocha, “Upgrading a low-cost system for measuring lightning electric field waveforms,” IEEE Transactions on Electromagnetic Compatibility, vol. 61, pp. 595–598, 2019. S. Karunarathne, T. C. Marshall, M. Stolzenburg, and N. Karunarathna, “Electrostatic field changes and durations of narrow bipolar events,” Journal of Geophysical Research: Atmospheres, pp. 1–14, 2016. R. J. Thomas, P. R. Krehbiel, T. Hamlin, J. Harlin, and D. Shown, “Observations of vhf source powers radiated by lightning,” Geophysical Research Letters, vol. 28, pp. 143–146, 2001. D. A. Smith, X. M. Shao, D. N. Holden, C. T. Rhodes, M. Brook, P. R. Krehbiel, M. Stanley, W. Rison, and R. J. Thomas, “A distinct class of isolated intracloud lightning discharges and their associated radio emissions,” Journal of Geophysical Research Atmospheres, vol. 104, pp. 4189– 4212, 1999. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2- s2.0-0033608497partnerID=tZOtx3y1 A. R. Jacobson and T. E. L. Light, “Revisiting "narrow bipolar eventïntracloud lightning using the forte satellite,” Annales Geophysicae, vol. 30, pp. 389–404, 2012. T. Wu, W. Dong, Y. Zhang, T. Funaki, S. Yoshida, T. Morimoto, T. Ushio, and Z. Kawasaki, “Discharge height of lightning narrow bipolar events,” Journal of Geophysical Research, vol. 117, p. D05119, 3 2012. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 84863375330partnerID=tZOtx3y1 A. Nag, “Characterization and modeling of lightning processes with emphasis on compact intracloud discharges,” p. 508, 2010. M. Ahmad, M. Esa, V. Cooray, Z. Baharudin, and P. Hettiarachchi, “Latitude dependence of narrow bipolar pulse emissions,” Journal of Atmospheric and Solar-Terrestrial Physics, vol. 128, pp. 40–45, 6 2015. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 84925435106partnerID=tZOtx3y1 K. C. Wiens, T. Hamlin, J. D. Harlin, and D. M. Suszcynsky, “Relationships among narrow bipolar events, total lightning and radar inferred convective strength in great plains thunderstorms,” Journal of Geophysical Research, vol. 113, pp. 1–31, 2008. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2- s2.0-77949294233partnerID=tZOtx3y1 S. Karunarathne, T. C. Marshall, M. Stolzenburg, and N. Karunarathna, “Modeling initial breakdown pulses of cg lightning flashes,” Journal of Geophysical Research Atmospheres, vol. 119, 2014. A. Nag, V. A. Rakov, D. Tsalikis, and J. A. Cramer, “On phenomenology of compact intracloud lightning discharges,” Journal of Geophysical Research, vol. 115, p. D14115, 7 2010. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 77955396523partnerID=tZOtx3y1 J. A. López, J. Montanyà, O. van der Velde, D. Romero, F. J. Gordillo-Vázquez, F. J. Pérez-Invernón, A. Luque, C. A. M. Rodriguez, T. Neubert, W. Rison, P. Krehbiel, J. N. González, N. Østgaard, and V. Reglero, “Initiation of lightning flashes simultaneously observed from space and the ground: Narrow bipolar events,” Atmospheric Research, vol. 268, 4 2022. S. Sharma, M. Fernando, and V. Cooray, “Narrow positive bipolar radiation from lightning observed in sri lanka,” Journal of Atmospheric and Solar-Terrestrial Physics, vol. 70, pp. 1251–1260, 7 2008. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 45449093166partnerID=tZOtx3y1 M. Ahmad, M. Esa, E. R. Williams, D. Periannan, M. Aziz, G. Lu, H. Zhang, and V. Cooray, “Emission height of narrow bipolar events of a tropical storm over malacca strait,” 2016. R. Albrecht, S. Goodman, D. Buechler, R. Blakeslee, and H. Christian, “Where are the lightning hotspots on earth?” Builletin America Meteorological Society, vol. 97, pp. 2051–2068, 2016. J. Herrera, C. Younes, and L. Porras, “Cloud-to-ground lightning activity in colombia: A 14-year study using lightning location system data,” Atmospheric Research, vol. 203, pp. 164–174, 2018. [Online]. Available: https://doi.org/10.1016/j.atmosres.2017.12.009 D. J. Cecil, D. E. Buechler, and R. J. Blakeslee, “Trmm lis climatology of thunderstorm occurrence and conditional lightning flash rates,” Journal of Climate, vol. 28, pp. 6536– 6547, 2015. N. Karunarathna, T. C. Marshall, M. Stolzenburg, and S. Karunarathne, “Narrow bipolar pulse locations compared to thunderstorm radar echo structure,” Journal of Geophysical Research: Atmospheres, vol. 120, pp. 11,690–11,706, 11 2015. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 84954441993partnerID=tZOtx3y1 F. Lü, B. Zhu, H. Zhou, V. A. Rakov, W. Xu, and Z. Qin, “Observations of compact intracloud lightning discharges in the northernmost region of china,” Journal of Geophysical Research: Atmospheres, vol. 118, pp. 4458–4465, 5 2013. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 84881170346partnerID=tZOtx3y1 A. V. Gurevich, G. M. Milikh, and R. Roussel-Dupre, “Runaway electron mechanism of air breakdown and preconditioning during a thunderstorm,” Physics Letters A, vol. 165, pp. 463–468, 1992. D. Li, F. Liu, F. J. Pérez-Invernón, G. Lu, Z. Qin, B. Zhu, and A. Luque, “On the accuracy of ray-theory methods to determine the altitudes of intracloud electric discharges and ionospheric reflections: Application to narrow bipolar events,” Journal of Geophysical Research: Atmospheres, vol. 125, pp. 1–10, 2020. T. Wu, Y. Takayanagi, S. Yoshida, T. Funaki, T. Ushio, and Z. Kawasaki, “Spatial relationship between lightning narrow bipolar events and parent thunderstorms as revealed by phased array radar,” Geophysical Research Letters, vol. 40, pp. 618–623, 2 2013. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 84878180257partnerID=tZOtx3y1 H. Zhang, G. Lu, X. Qie, R. Jiang, Y. Fan, Y. Tian, Z. Sun, M. Liu, Z. Wang, D. Liu, and G. Feng, “Locating narrow bipolar events with singlestation measurement of low-frequency magnetic fields,” Journal of Atmospheric and Solar-Terrestrial Physics, vol. 143-144, pp. 88–101, 2016. [Online]. Available: http://dx.doi.org/10.1016/j.jastp.2016.03.009 A. Nag and V. A. Rakov, “Compact intracloud lightning discharges: 2. estimation of electrical parameters,” Journal of Geophysical Research, vol. 115, p. D20103, 10 2010. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 78049406039partnerID=tZOtx3y1 F. C. Lü, B. Y. Zhu, M. Ma, L. X. Wei, and D. Ma, “Observations of narrow bipolar events during two thunderstorms in northeast china,” Science China Earth Sciences, vol. 56, pp. 1459–1470, 2013. T. Wu, S. Yoshida, and T. Ushio, “Observations of narrow bipolar events initiating regular lightning flashes.” IEEE, 8 2014, pp. 1– 4. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 84919776651partnerID=tZOtx3y1 P. J. Medelius, E. M. Thomson, and J. S. Pierce, “E and de/dt waveshapes for narrow bipolar pulses in intracloud lightning.” NASA. Kennedy Space Center, The 1991 International Aerospace and Ground Conference on Lightning and Static Electricity, Volume 1; 10 p, 1991, pp. 12–1 – 12–10, available in eBooks Doctorado. J. C. Willett, J. C. Bailey, and E. P. Krider, “A class of unusual lightning electric field waveforms with very strong high-frequency radiation,” Journal of Geophysical Research, vol. 94, p. 16255, 1989. A. Hazmi, P. Emeraldi, M. I. Hamid, and N. Takagi, “Research on positive narrow bipolar events in padang,” Proceedings - 2016 3rd International Conference on Information Technology, Computer, and Electrical Engineering, ICITACEE 2016, pp. 156–159, 2017. T. Gunasekara, M. Fernando, U. Sonnadara, and V. Cooray, “Characteristics of narrow bipolar pulses observed from lightning in sri lanka,” Journal of Atmospheric and Solar-Terrestrial Physics, vol. 138-139, pp. 66–73, 2 2016. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 84951286333partnerID=tZOtx3y1 Y. Wang, G. Zhang, X. Qie, D. Wang, T. Zhang, Y. Zhao, Y. Li, and T. Zhang, “Characteristics of compact intracloud discharges observed in a severe thunderstorm in northern part of china,” Journal of Atmospheric and Solar-Terrestrial Physics, vol. 84- 85, pp. 7–14, 2012. [Online]. Available: http://dx.doi.org/10.1016/j.jastp.2012.05.003 K. B. Eack, “Electrical characteristics of narrow bipolar events,” Geophysical Research Letters, vol. 31, p. L20102, 2004. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 11844302162partnerID=tZOtx3y1 S. Karunarathne, T. Marshall, M. Stolzenburg, and N. Karunarathna, “Observations of positive narrow bipolar pulses,” Journal of Geophysical Research: Atmospheres, vol. 120, pp. 7128–7143, 2015. S. Bandara, T. Marshall, S. Karunarathne, N. Karunarathne, R. Siedlecki, and M. Stolzenburg, “Characterizing three types of negative narrow bipolar events in thunderstorms,” Atmospheric Research, vol. 227, pp. 263–279, 2019. [Online]. Available: https://doi.org/10.1016/j.atmosres.2019.05.013 https://linkinghub.elsevier.com/retrieve/pii/S0169809519301383 E. M. Smith, T. C. Marshall, S. Karunarathne, R. Siedlecki, and M. Stolzenburg, “Initial breakdown pulse parameters in intracloud and cloud-to-ground lightning flashes,” Journal of Geophysical Research: Atmospheres, vol. 123, pp. 2129–2140, 2018. F. Liu, B. Zhu, G. Lu, Z. Qin, J. Lei, K.-M. Peng, A. B. Chen, A. Huang, S. A. Cummer, M. Chen, M. Ma, F. Lyu, and H. Zhou, “Observations of blue discharges associated with negative narrow bipolar events in active deep convection,” Geophysical Research Letters, 2018. [Online]. Available: http://doi.wiley.com/10.1002/2017GL076207 R. A. Marshall, C. L. da Silva, and V. P. Pasko, “Elve doublets and compact intracloud discharges,” Geophysical Research Letters, vol. 42, pp. 6112–6119, 7 2015. [Online]. Available: http://www.scopus.com/inward/record.url?eid=2-s2.0- 84938962666partnerID=tZOtx3y1 I. Kolmašová, O. Santolík, E. Defer, W. Rison, S. Coquillat, S. Pedeboy, R. Lán, L. Uhlíř, D. Lambert, J. P. Pinty, S. Prieur, and V. Pont, “Lightning initiation: Strong pulses of vhf radiation accompany preliminary breakdown,” Scientific Reports, vol. 8, pp. 4–13, 2018. V. Cooray, G. Cooray, M. Rubinstein, and F. Rachidi, “Modeling compact intracloud discharge (cid) as a streamer burst,” Atmosphere, vol. 11, 2020. H. E. Rojas, C. A. Rivera, J. Chaves, C. A. Cortés, F. J. Román, and M. Fernando, “New circuit for the measurement of lightning generated electric fields,” 2017 International Symposium on Lightning Protection, XIV SIPDA 2017, pp. 188–194, 2017. M. G. Stock, M. Akita, P. R. Krehbiel, W. Rison, H. E. Edens, Z. Kawasaki, and M. A. Stanley, “Continuous broadband digital interferometry of lightning using a generalized cross-correlation algorithm,” Journal of Geophysical Research Atmospheres, vol. 119, pp. 3134–3165, 2014. X. Fan, P. Krehbiel, J. Tilles, M. Stanley, S. Senay, H. Edens, W. Rison, and Y. Zhang, “Radio interferometer observations and analysis of an radio interferometer observations and analysis of an energetic in-cloud pulse based on ensemble empirical mode decomposition,” IEEE Transactions on Geoscience and Remote Sensing, pp. 1–17, 2021. A. Chilingarian, M. Dolgonosov, A. Kiselyov, Y. Khanikyants, and S. Soghomonyan, “Lightning observations using broadband vhf interferometer and electric field measurements,” Journal of Instrumentation, vol. 15, 2020. Z. Koochak and A. Fraser-Smith, “Single-station lightning location using azimuth and time of arrival of sferics,” Radio Science, vol. 55, 2020. S. Bandara, T. Marshall, S. Karunarathne, and M. Stolzenburg, “Electric field change and vhf waveforms of positive narrow bipolar events in mississippi thunderstorms,” Atmospheric Research, vol. 243, p. 105000, 2020. [Online]. Available: https://doi.org/10.1016/j.atmosres.2020.105000 A. F. R. Leal, V. A. Rakov, and B. R. P. da Rocha, “Compact intracloud discharges: New classification of field waveforms and identification by lightning locating systems,” Electric Power Systems Research, vol. 173, pp. 251–262, 2019. D. Aranguren, J. López, J. Inampués, H. Torres, and H. D. Betz, “Cloud-to-ground ligthning activity in colombia and the influence of topography,” Journal of Atmospheric and Solar-Terrestrial Physics, vol. 154, pp. 1850–1855, 2014. [Online]. Available: http://dx.doi.org/10.1016/j.jastp.2016.08.010 S. Bandara, T. Marshall, S. Karunarathne, and M. Stolzenburg, “Groups of narrow bipolar events within thunderstorms,” Atmospheric Research, vol. 252, p. 105450, 2021. [Online]. Available: https://doi.org/10.1016/j.atmosres.2021.105450 D. Li, A. Luque, F. J. Gordillo-Vázquez, C. da Silva, P. R. Krehbiel, F. Rachidi, and M. Rubinstein, “Secondary fast breakdown in narrow bipolar events,” 4 2022 F. Diaz, D. Ortiz, and F. Roman, “Lightning climatology in colombia,” Theoretical and Applied Climatology, 2022. [Online]. Available: https://doi.org/10.1007/s00704-022-04012-9 |
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Atribución-NoComercial-CompartirIgual 4.0 Internacional |
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http://creativecommons.org/licenses/by-nc-sa/4.0/ |
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Atribución-NoComercial-CompartirIgual 4.0 Internacional http://creativecommons.org/licenses/by-nc-sa/4.0/ http://purl.org/coar/access_right/c_abf2 |
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xxiii, 117 páginas |
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Universidad Nacional de colombia |
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Bogotá - Ingeniería - Doctorado en Ingeniería - Ingeniería Eléctrica |
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Facultad de Ingeniería |
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Bogotá,Colombia |
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Universidad Nacional de Colombia - Sede Bogotá |
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Universidad Nacional de Colombia |
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Atribución-NoComercial-CompartirIgual 4.0 Internacionalhttp://creativecommons.org/licenses/by-nc-sa/4.0/info:eu-repo/semantics/openAccesshttp://purl.org/coar/access_right/c_abf2Román Campos, Francisco José1ced0962c038cb21ad506628dd641425Díaz Ortiz, Fernando Augustoe83bd76756b38ba636b14e7422c6d672Compatibilidad electromagnética0000-0002-7989-3475https://scienti.minciencias.gov.co/cvlac/visualizador/generarCurriculoCv.do?cod_rh=00009384402023-04-19T16:34:20Z2023-04-19T16:34:20Z2023https://repositorio.unal.edu.co/handle/unal/83737Universidad Nacional de ColombiaRepositorio Institucional Universidad Nacional de Colombiahttps://repositorio.unal.edu.co/ilustraciones, fotografías a colorEste estudio determina las características de los pulsos bipolares estrechos (NBEs) en Bogotá, Colombia, proporcionando información sobre los NBEs en una región tropical observada desde un altiplano andino. La instrumentación y el software de rayos se crearon específicamente para este estudio y consisten en un módulo de medición de campo eléctrico, un módulo de medición de campo magnético y un interferómetro de rayos de banda ancha. Para la adquisición de datos, la instrumentación de rayos utiliza dos osciloscopios digitales que en conjunto proporcionan ocho canales. Los instrumentos de rayos se desplegaron en el techo de un edificio en el centro de la ciudad de Bogotá. La campaña de medición recopiló datos desde el 14 de noviembre de 2019 hasta el 9 de abril de 2020 e incluye la segunda temporada de lluvias de 2019 y parte de la primera temporada de lluvias de 2020. El período de observación duró exactamente 148 días y registró 1.316 eventos relacionados con rayos. La identificación de los NBEs involucró cuatro etapas: la primera etapa tuvo como objetivo eliminar el ruido de la señal adquirida, la segunda etapa involucró la identificación de los NBEs, la tercera etapa involucró la clasificación de los NBEs en función de sus formas de onda y, finalmente, la cuarta etapa involucró la medición de las características individuales de los NBEs. Este proceso se realizó en todos los eventos de rayos registrados. Un resumen de los hallazgos obtenidos en este estudio es el siguiente: los NBEs están presentes en solo una sexta parte de toda la actividad de rayos detectada, y la mayoría de ellos son de polaridad positiva en una proporción de 3 a 1. La polaridad positiva tiene una duración más larga para el pulso principal y duración total que su contraparte. Con respecto a su tipo, el Tipo A (un pulso bipolar típico) es una ocurrencia rara, lo que significa que oscilaciones adicionales sobre la forma de onda básica es una característica común. Combinando criterios de aislamiento temporal y espacial, el 13 % de los NBEs pueden considerarse NBEs aisladas, lo que sugiere que los NBEs restantes podrían estar relacionadas con el inicio de descargas intranubes, descargas nube-tierra (CG) o incluso NBEs con actividad posterior fallida. Aproximadamente el 80 % de los registros adquiridos durante este estudio presentan pulsos con duraciones menores a un microsegundo en distintos momentos. Adicionalmente, hay 22 grupos de NBEs compuestos por dos o tres NBEs temporalmente cercanos. La rara presencia de NBEs en la actividad regular de rayos sugiere que los NBEs no son la causa del inicio de los rayos. Esta afirmación está respaldada en este estudio por su presencia en solo una sexta parte de toda la actividad de rayos registrada. Los datos recopilados sugieren que los NBEs no son un evento aislado, sino que, se deduce que los NBEs son un fenómeno que tiene lugar como un efecto relacionado de algún CG o como parte del desarrollo de descargas eléctricas intranubes posteriores. El valor medio de la duración total del pulso sugiere que los NBE deben originarse a partir de alguna descarga eléctrica energética y de corta duración. Este resultado concuerda con la hipótesis de que las descargas eléctricas rápidas son el fenómeno responsable de la producción de NBEs. Al comparar las tasas de ocurrencia de NBEs, el resultado revela una relación aparente con la latitud, lo que significa que los NBE son más frecuentes en latitudes más bajas y también muestran una mayor proporción de NBEs de polaridad negativa. La tasa de ocurrencia del tipo A y el tipo C es similar a estudios previos, pero las proporciones para el tipo B y el tipo D ciertamente difieren, lo que exige un análisis más profundo para abordar este problema. (Texto tomado de la fuente)This study determines the features of narrow bipolar events (NBEs) in Bogotá, Colombia, providing insights into NBEs in a tropical region observed from an Andean high-plateau. The lightning instrumentation and software were created specifically for this study, consisting of an electric field measurement module, a magnetic field measurement module, and a broadband lightning interferometer. For data acquisition, the lightning instrumentation uses two digital oscilloscopes that together provide eight channels. Lightning instruments were deployed on the roof of a building in the city center of Bogotá. The measuring campaign collected data spans from November 14, 2019 to April 9, 2020 and includes the second rainy season of 2019 and part of the first rainy season of 2020. The observation period lasted exactly 148 days and recorded 1,316 lightning-related events. The identification of NBEs involved four stages: the first stage aimed at removing noise from the acquired signal, the second stage involved identifying NBEs, the third stage involved classifying NBEs based on their waveforms, and finally, the fourth stage involved measuring individual NBE features. This process was done on all recorded lightning events. A summary of the findings of this study is as follows: NBEs are present in only one-sixth of all lightning activity detected, with most of them being of positive polarity in a ratio of 3 to 1. Positive polarity has a longer duration for the main pulse and total duration than its counterpart. Regarding their type, Type A (a typical bipolar pulse) is a rare occurrence, meaning that additional ringing over its basic waveform is a common feature. By combining time and spatial isolation criteria, 13 % of NBEs can be considered to be truly isolated NBEs, suggesting that the remaining NBEs could be related to the initiation of IC, CG, or even NBEs with failed subsequent activity. Approximately 80 % of the records acquired during this study have sub-microsecond pulses at any moment of their process, and there are 22 groups of NBEs comprised of two or three temporally close NBEs. The rare presence of NBEs in regular lightning activity suggests NBEs are not the cause of lightning inception. This statement is supported in this study by their presence in only one-sixth of all lightning activity recorded. Data collected suggests NBEs are not an isolated event, instead, from data analysis, it is deduced that NBEs are a phenomenon that takes place as a related effect of some CG or as part of the development of subsequent intracloud electrical discharges. The mean value for total pulse duration suggests NBEs must originate from some energetic and short-duration electrical discharge. This result concurs with the hypothesis of fast electrical breakdowns are a responsible phenomenon for NBEs production. Comparing occurrence rates of NBEs, the effort reveals a relation to latitude meaning NBEs are more prevalent in lower latitudes also showing a higher proportion of negative polarity NBEs. The occurrence rate of type A and type C are similar to previous studies but proportions for type B and type D certainly differs demanding further analysis to address this issue.DoctoradoDoctor en IngenieríaAtmospheric electricityxxiii, 117 páginasapplication/pdfengUniversidad Nacional de colombiaBogotá - Ingeniería - Doctorado en Ingeniería - Ingeniería EléctricaFacultad de IngenieríaBogotá,ColombiaUniversidad Nacional de Colombia - Sede Bogotá550 - Ciencias de la tierraCampos eléctricosCampos electromagnéticosElectric fieldsElectromagnetic fieldsLightningNarrow bipolar eventNarrow bipolar pulsecompact intracloud dischargeInterferometryRayosPulsos bipolares estrechosEventos bipolares estrechosInterferometríaDescarga compacta intranubeNarrow bipolar events study based on broadband observationsEstudio de pulsos bipolares estrechos basado en observaciones de banda anchaTrabajo de grado - Doctoradoinfo:eu-repo/semantics/doctoralThesisinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_db06Texthttp://purl.org/redcol/resource_type/TDT. 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