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https://repository.unad.edu.co/handle/10596/29461| Title: | Origin of air masses in four Colombian cities using HYSPLIT model Origen de masas de aire en cuatro ciudades de Colombia mediante el modelo HYSPLIT Origem das massas de ar em quatro ciudades na Colômbia por modelo HYSPLIT |
| metadata.dc.creator: | Ramírez Hernández, Omar Javier |
| Keywords: | air quality; meteorology; atmospheric modeling; retro-trajectories; transport of pollutants.;calidad del aire; meteorología; modelación atmosférica; retro-trayectorias; transporte de contaminantes.;qualidade do ar; meteorologia; modelagem atmosférica; retro trajetórias; transporte de contaminantes. |
| Publisher: | Universidad Nacional Abierta y a Distancia, UNAD |
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| metadata.dc.format.*: | application/pdf |
| metadata.dc.type: | info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
| Description: | The objective of this research it was to identify the origins of air masses in four cities in Colombia (Bogota, Cartagena de Indias, Pasto and Leticia) that have the potential to affect the urban air quality when transporting particulated material long distances from different geographic locations. Methodologically information provided was used by the Hysplit model version 4, with which retro-trajectories were measured for a period of analysis of a year (from January 01 to December 31, 2012). The calculation of retro-trajectories is very useful to determine the area of departure of the air masses that arrive at a particular time, in a specific place, and at a defined height. In this way daily retro-trajectories were obtained, registered at 12:00 UTC (Coordinated Universal Time), with calculations at intervals of six hours, representing the carriage performed by the mass of air the past five days (120 h). The isentropic heights considered were 750, 1500 and 2500 m measures from the ground level. According to the results obtained, the origin of air masses more frequent in Cartagena de Indias during 2012 was Caribbean (45 % ), followed by Continental (36 % ). In Bogotá, it was Continental (77 %), followed by Eastern Atlantic (19 % ). In Pasto, it was Pacific (72 %), followed by Continental (23 %). And in Leticia, it was Continental (99 %) followed by the origin, east Atlantic (1 %). El objetivo de esta investigación fue identificar los orígenes de las masas de aire en cuatro ciudades colombianas (Bogotá, Cartagena de Indias, Pasto y Leticia) que tienen el potencial de afectar la calidad del aire urbano al transportar material particulado a largas distancias desde diferentes puntos geográficos. Metodológicamente se utilizó información proporcionada por el modelo HYSPLIT versión 4, con el cual se midieron retro-trayectorias para un periodo de análisis de un año (desde el 01 de enero a 31 de diciembre de 2012). El cálculo de retrotrayectorias es de gran utilidad para determinar la zona de partida de las masas de aire que llegan en un momento determinado, a un lugar concreto y a una altura definida. De esta forma se obtuvieron retro-trayectorias diarias registradas a las 12:00 UTC (tiempo universal coordinado), con cálculos a intervalos de seis horas, representando el transporte realizado por la masa de aire los cinco días anteriores (120 h). Las alturas isentrópicas consideradas fueron de 750, 1500 y 2500 m medidas desde el nivel del suelo. Según los resultados obtenidos, el origen de masas de aire más frecuente en Cartagena de Indias durante 2012 fue Caribe (45%), seguido por Continental (36%). En Bogotá fue Continental (77%), seguido por Atlántico Este (19%). En Pasto fue Pacífico (72%), seguido por Continental (23%). Y en Leticia fue Continental (99%) seguido por el origen Atlántico Este (1%). O objetivo deste trabalho é identificar as origens das massas de ar em quatro cidades colombianas (Bogotá, Cartagena, Pasto e Leticia), que têm o potencial de afetar a qualidade do ar urbano ao transportar material particulado por longas distâncias a partir de diferentes localizações geográficas. Metodologicamente foi usada informação fornecida pela HYSPLIT versão 4, com o qual foram medidas retro- trajetórias por um período de análise de um ano (de 1 de Janeiro a 31 de dezembro de 2012). O cálculo das trajetórias é muito útil para determinar a localização do inicio das massas de ar que chegam em um momento particular em um lugar especial em uma altura definida. Assim obtiveramse retro-trajetórias registrados diariamente às 12:00 UTC (Tempo Universal Coordenado), com estimativas em intervalos de seis horas, o que representa o transporte de massa por via aérea, cinco dias antes (120 h). As alturas isentrópicas consideradas foram 750, os passos 1500 e 2500 m calculadas a partir do nível do solo. De acordo com os resultados, a origem das massas de ar mais frequentemente em Cartagena das Índias em 2012 foi Caribe (45%), seguida pela Continental (36%). Em Bogotá foi continental (77%), seguido por Atlântica este (19%). Em Pasto Pacífico (72%) foi seguido por Continental (23%). E Letícia foi continental (99%), seguido por a origem do Atlântico Médio (1%). |
| metadata.dc.source: | Revista de Investigación Agraria y Ambiental; Vol. 5, Núm. 1 (2014); 103-119 Revista de Investigación Agraria y Ambiental; Vol. 5, Núm. 1 (2014); 103-119 2145-6453 2145-6097 |
| URI: | https://repository.unad.edu.co/handle/10596/29461 |
| Other Identifiers: | http://hemeroteca.unad.edu.co/index.php/riaa/article/view/935 10.22490/21456453.935 |
| Appears in Collections: | Revista RIAA |
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