Articles | Volume 24, issue 20
https://doi.org/10.5194/acp-24-11497-2024
https://doi.org/10.5194/acp-24-11497-2024
Research article
 | 
16 Oct 2024
Research article |  | 16 Oct 2024

Long-range transport of air pollutants increases the concentration of hazardous components of PM2.5 in northern South America

Maria P. Velásquez-García, K. Santiago Hernández, James A. Vergara-Correa, Richard J. Pope, Miriam Gómez-Marín, and Angela M. Rendón

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This preprint is open for discussion and under review for Biogeosciences (BG).
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Cited articles

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Andreae, M. O., Andreae, T. W., Annegarn, H., Beer, J., Cachier, H., Le Canut, P., Elbert, W., Maenhaut, W., Salma, I., Wienhold, F. G., and Zenker, T.: Airborne studies of aerosol emissions from savanna fires in southern Africa: 2. Aerosol chemical composition, J. Geophys. Res.-Atmos., 103, 32119–32128, https://doi.org/10.1029/98JD02280, 1998. a
Arregocés, H. A., Rojano, R., and Restrepo, G.: Health risk assessment for particulate matter: application of AirQ+ model in the northern Caribbean region of Colombia, Air Qual. Atmos. Hlth., 16, 897–912, https://doi.org/10.1007/s11869-023-01304-5, 2023. a, b
AS/NZS: Methods for sampling and analysis of ambient air – Method 9.14: Determination of suspended particulate matter – PM2.5 high volume sampler with size selective inlet – Gravimetric method, Standards New Zeland, https://www.standards.govt.nz/shop/asnzs-3580-9-142013/ (last access: 1 October 2024), 2013. ​​​​​​​ a
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In the Aburrá Valley, northern South America, local emissions determine air quality conditions. However, we found that external sources, such as regional fires, Saharan dust, and volcanic emissions, increase particulate concentrations and worsen chemical composition by introducing elements like heavy metals. Dry winds and source variability contribute to seasonal influences on these events. This study assesses the air quality risks posed by such events, which can affect broad regions worldwide.
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