Aerosol Research
Aerosol Research
Aerosol Research
Articles | Volume 4, issue 1
Articles | Volume 4, issue 1
https://doi.org/10.5194/ar-4-153-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/ar-4-153-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 4, issue 1
Research article
 | 
20 Mar 2026
Research article |  | 20 Mar 2026

Six-year trend of concentrations of ultrafine particles 6 km away from a major German airport

Holger Gerwig, Wolfram Birmili, Kay Weinhold, Honey Dawn Contecson Alas, Alfred Wiedensohler, and Wilma Travnicek

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Short summary
Seven years of hourly particle number size distributions of 10–500 nanometres were measured at an urban background in Germany. A downward trend of total particle number concentrations of −2 % per year was observed. Wind from the Frankfurt Airport showed the highest nucleation mode particle concentrations. Lockdown lowered the concentration of ultrafine particles in the direction of the airport. On 30 % of all days, the World Health Organization's ultrafine particles value for high concentrations was exceeded.
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