Validation of PM10 and PM2.5 early alert in Bogotá, Colombia, through the modeling software WRF-CHEM

Casallas, Alejandro; Celis, Nathalia; Ferro, Camilo; López-Barrera, Ellie Anne; Peña, Carlos; Corredor, John; Segura, Miguel Ballen

doi:10.1007/s11356-019-06997-9

Cited by 21 publications

(9 citation statements)

References 35 publications

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“…Additionally, the country experiences a significant increase in vehicular flow in urban and rural areas. As a result, large cities face environmental problems related to air quality, mainly due to particulate matter ( Casallas et al, 2020 ; Lopez-Restrepo et al, 2020 ). Logically, the reduction in the number of vehicles and industrial operations has an impact on air quality due to the isolation and cessation of productive activities.…”

Section: Introductionmentioning

confidence: 99%

Impact of lockdown on particulate matter concentrations in Colombia during the COVID-19 pandemic

Arregocés

Rojano

Restrepo

2021

Science of The Total Environment

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The first confirmed case of COVID-19 in Colombia was reported on March 6, 2020. For this reason, on March 25, preventive isolation was declared mandatory. These measures involved the suspension of economic activities and drastically reduced the number of vehicles on the road. The objective of this study is to evaluate the impact of the lockdown due to the COVID-19 pandemic on PM 2.5 concentrations at 5 monitoring stations and aerosol optical depth values of the Terra/MODIS satellite. We analyzed and compared the weekly and monthly concentrations of PM 2.5 before and during the lockdown between the week of January 6 to June 22, 2020, and compared the daily values obtained from the Terra/MODIS satellite for the months of January–June during the years 2018–2020 to elucidate the effects of the lockdown. Similar to other monitored sites in the world, we observed substantial reductions in weekly PM 2.5 concentrations, from 41 to 84% (Bogotá), from 13 to 66% (Funza), from 17 to 57% (Boyacá), from 35 to 86% (Valledupar) and 31 at 60% (Risaralda). Unlike other studies, the aerosol optical depth values increased up to 59% during the months of lockdown compared to previous years and up to 70% of the weekly mean when compared to before the lockdown. These spatiotemporal behaviors of PM 2.5 and the aerosol optical depth in Colombia are influenced by reductions in vehicular flow during quarantine, regional rainfall, and height of the planetary boundary layer. Emissions from economic activities affect pollutant levels in the area. The analysis of the levels of pollutants during the lockdown provides a baseline for regulatory agencies to establish mitigation plans.

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Section: Introductionmentioning

confidence: 99%

Impact of lockdown on particulate matter concentrations in Colombia during the COVID-19 pandemic

Arregocés

Rojano

Restrepo

2021

Science of The Total Environment

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“…La contaminación del aire es una de las problemáticas de mayor prioridad en el mundo [26] y como tal amerita avanzar en los procesos de generación de nuevo conocimiento, con la menor incertidumbre posible y con herramientas que ayuden a tomar decisiones en diferentes escalas territoriales [27]. En Colombia, se ha avanzado de manera importante en la comprensión de este fenómeno, al lograr la medición de contaminantes criterio (principalmente pm 2.5 , pm 10 , o 3 , no, no 2 y no x ), el análisis de su dispersión espacio-temporal [28] y de sus fuentes a escalas regionales y locales [29]. También se han podido lograr algunos avances en establecer los procesos de exposición de las comunidades a los contaminantes criterios y medir sus impactos en salud, aunque con un grado de incertidumbre importante, dada la escala poblacional de la determinación del proceso [30].…”

Section: Discussionunclassified

Distribución espacial de la morbimortalidad atribuible a la contaminación del aire por pm2.5 en Medellín (Colombia), 2010-2016

Piñeros-Jiménez

Franco-Piedrahíta²,

Montealegre

et al. 2022

Rev. Fac. Nac. Salud Pública

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Objetivo: Esta investigación buscó establecer la distribución espacial de la morbimortalidad atribuible a la contaminación del aire ambiental por materia particulada (particulate matter 2.5) (pm2.5) en Medellín entre 2010 y 2016. Métodos: Se planteó un estudio ecológico. Se estandarizaron las direcciones de residencia de los pacientes atendidos y las defunciones por eventos de interés. Se emplearon mapas de calor, mediante el análisis de densidad de Kernel, por núcleos domiciliarios para áreas de 10 000 m2. Resultados: Se encontraron 45 487 y 2743 casos y defunciones, respectivamente, atribuibles a la contaminación del aire ambiental por pm2.5 con datos de localización geográfica. La zona suroccidental de la ciudad presentó las mayores densidades de eventos atribuibles por todas las causas estudiadas y por grupo de eventos, con algunas áreas pequeñas en otros lugares. Por su parte, la zona suroriental, con las mejores condiciones socioeconómicas, manifestó la menor concentración de eventos atribuibles. Conclusión: La información geocodificada de la morbimortalidad por núcleos domiciliarios posibilitó establecer la distribución de casos y muertes atribuibles a la contaminación ambiental del aire por pm2.5 en Medellín, con mayor concentración al suroccidente de la ciudad, lo que permite evidenciar la presencia de disparidades territoriales de este fenómeno.

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“…Although traffic and PM emission activities have reduced, some studies report PM levels to increase (Arregocés et al, 2020;Broomandi et al, 2020). The increasing vehicle flow in urban and rural areas, industrial expansion, and dependence on the extraction of non-renewable resources expose Colombia to air pollution challenges (Casallas et al, 2020;Lopez-Restrepo et al, 2020). Studies to understand the environmental impact of the COVID-19 pandemic in Colombia have focused on analyzing urban and small industrial areas.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Effects of Lockdown due to the COVID-19 Pandemic on Air Quality at Latin America’s Largest Open-pit Coal Mine

Arregocés

Rojano

Restrepo

2021

Aerosol Air Qual. Res.

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Particulate Matter is the main pollutant produced in open-pit mining operations. Its emission into the atmosphere is strongly associated with adverse health effects in the surrounding communities. The objective of the study is to evaluate the impact of lockdown due to the COVID-19 pandemic on the particulate matter (PM) levels in the Northern, Central, and Southern Zones of the largest open-pit coal mine in Latin America. We analyzed and compared daily data on PM10 and PM2.5 before and during the emergency shutdown from the week of March 6 through April 13, 2020, while comparing daily values from the combined product of the Terra-Aqua/MODIS satellites to elucidate the effects of the closure. Unlike other sites monitored globally, we observed an increase in the average PM 10 concentrations in the Northern Zone (13-38%) and Southern Zone (4-7%) of the coal mine. Additionally, PM2.5 concentrations increased in the Southern Zone by up to 43% throughout the lockdown when compared to daily records prior to the commencement of mandatory isolation. PM10 concentrations in the Central Zone decreased (26-31%) in the course the lockdown. Further, higher aerosol optic depth (AOD) values (≥0.4) were evident over the Central and Southern study areas during the lockdown, as well as significant AOD loads upwind and downwind of the coal production pits. Wetter (up to 3.5%), warmer (up to 0.3 K), reduced planetary boundary layer height (up to 0.11 km), wind field variability, and biomass burning in rural areas determine the spatial-temporal behavior of PM. The reduction of emissions from PMmining activities was almost compensated by changes in meteorology and external sources. These results provide a baseline for regulators to establish future mitigation plans.

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Validation of PM10 and PM2.5 early alert in Bogotá, Colombia, through the modeling software WRF-CHEM

Cited by 21 publications

References 35 publications

Impact of lockdown on particulate matter concentrations in Colombia during the COVID-19 pandemic

Impact of lockdown on particulate matter concentrations in Colombia during the COVID-19 pandemic

Distribución espacial de la morbimortalidad atribuible a la contaminación del aire por pm2.5 en Medellín (Colombia), 2010-2016

Effects of Lockdown due to the COVID-19 Pandemic on Air Quality at Latin America’s Largest Open-pit Coal Mine

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