Articles | Volume 25, issue 24
https://doi.org/10.5194/acp-25-18389-2025
https://doi.org/10.5194/acp-25-18389-2025
Research article
 | 
17 Dec 2025
Research article |  | 17 Dec 2025

Origin, transport and processing of organic aerosols at different altitudes in coastal Mediterranean urban areas

Clara Jaén, Mireia Udina, Roy Harrison, Joan O. Grimalt, and Barend L. Van Drooge

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Distance changes air pollution in a city, but so does the time of the day and the year, due to varying emission sources and weather conditions. These changes were studied at ground level and 400 meters above the city, and showed that wood burning affected the air quality in winter, while products of atmospheric reaction processes dominated the air in summer. Traffic emissions arrive to the elevated site during the day, while they were trapped at lower level in the night.
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