Articles | Volume 25, issue 21
https://doi.org/10.5194/acp-25-14825-2025
https://doi.org/10.5194/acp-25-14825-2025
Research article
 | 
14 Nov 2025
Research article |  | 14 Nov 2025

How COVID-19 related policies reshaped organic aerosol source contributions in Central London

Gang I. Chen, Anja H. Tremper, Max Priestman, Anna Font, and David C. Green

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Short summary
This study quantified the impact of the COVID lockdown and the Eat Out To Help Out (EOTHO) on the sources/compositions of aerosols. The lockdown significantly reduced the primary emission sources. This study confirmed the important presence of cooking emissions from commercial kitchens in Central London by detecting the enhancement caused by the EOTHO policy after the lockdown. Biomass burning organic aerosol co-emitted with cooking activities from either the fuels or food ingredients used.
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