Cloud-to-ground lightning activity in Colombia: A 14-year study using lightning location system data

Seasonal Analysis of Cloud-To-Ground Lightning Flash Activity in the Western Antarctica

“…As a result, a total of 2,019,923 flashes were detected in this study, consisting of 43.01% +CG and 56.99% −CG flashes. The results, presented in Table 2, show that the amount of +CG flashes found was very significant at 43% and the ratio of +CG to −CG flashes was relatively high as compared with previous studies on observation and occurrences of +CG flashes carried out in other geographical regions [6,7,10,36,37,39]. In general, around 90% of the total CG flashes found were −CG while the other 10% were +CG [1,5,40].…”

“…Additionally, a higher number of lightning flashes occurred during the dry season, between May to September, as compared with the rainy season, between October to December, ins 2015, which implies that the rainy season does not affect the frequency of lightning. Herrera et al [7] reported the analysis of 14 years of CG lightning activity in Columbia using a stroke grouping algorithm. They found 74% and 26% of the occurrences were negative and positive flashes, respectively.…”

Caracterización de parámetros del rayo en Colombia con base en sistemas de localización terrestres y satelitales, 20 años de análisis

“…El primer período de operación fue de 1997 a 2001, cuando se contaba con seis sensores LPATSIII (Lightning Position and Tracking System) distribuidos en diferentes lugares del territorio colombiano, una unidad de procesamiento central que obtenía la localización e información básica de señales electromagnéticas de descargas de rayos (strokes) con base en el método TOA. En el segundo período, entre el 2007 y el 2015, se operaba con un sistema compuesto de seis sensores IMPACT LS7001 ubicados en lugares diferentes a la red original, los cuales determinaban el punto de impacto de los flashes nube-tierra mediante la combinación de los métodos MDF y TOA (Herrera, et al, 2018).…”

“…Nat. 44(173):960-973, octubre-diciembre de 2020 Durante las últimas décadas se llevaron a cabo en Colombia diversos estudios sobre el fenómeno del rayo y su caracterización, los cuales fueron recopilados recientemente (Torres, 2017;Torres, et al, 2015;Herrera, et al, 2018); en ellos se confirma la preponderancia de la actividad de los rayos en el país y su naturaleza privilegiada para este tipo de estudios, cuya pertinencia responde, entre otros aspectos, a las altas tasas de mortalidad y morbilidad debidas al fenómeno (Cruz-Beranal, et al, 2018), así como a su impacto económico y social, como lo han analizado ampliamente para los Estados Unidos continentales (contiguous United States, CONUS) Koshak, et al (2015), y para la zona montañosa, Soto & Pérez (2019). Por otra parte, la confiabilidad de los sistemas eléctricos de potencia bajo estas condiciones ha sido analizada por Pérez, et al (2020).…”

Lightning Activity Over Chilean Territory

“…Chile is located in the southern hemisphere in South America between 17. S and S and W and W. The country has varied topographic characteristics and a climate that is, strongly influenced by factors such as latitude, altitude, atmospheric dynamics and oceanic influence, which control some of the basic climatic variables such as temperature, pressure, wind, humidity and precipitation (Fuenzalida et al., 2005; R. Garreaud et al., 2013; Viale & Garreaud, 2015). From the 4,270 km of length (from north to south), only 15% of the 4,270 km is located in the tropical region, where the major lightning activity over the globe occurs—north of South America and the center of Africa—(Albrecht et al., 2016; Avila et al., 2015; Bürgesser et al., 2012; Burgesser et al., 2013; Herrera et al., 2017; Torres et al., 2015). Although most of the territory is in the subtropical region, high failure rates of overhead power lines of the transmission system (Montaña et al., 2019), deaths and tragedies due to lightning have been reported recently in local media.…”