Articles | Volume 21, issue 24
Atmos. Chem. Phys., 21, 18195–18212, 2021
https://doi.org/10.5194/acp-21-18195-2021
Atmos. Chem. Phys., 21, 18195–18212, 2021
https://doi.org/10.5194/acp-21-18195-2021

Research article 15 Dec 2021

Research article | 15 Dec 2021

Why is the city's responsibility for its air pollution often underestimated? A focus on PM2.5

Philippe Thunis et al.

Data sets

Why is the city's responsibility for its air pollution often underestimated? A focus on PM2:5 E. Pisoni https://doi.org/10.5281/zenodo.5770975

Model code and software

Why is the city's responsibility for its air pollution often underestimated? A focus on PM2:5 E. Pisoni https://doi.org/10.5281/zenodo.5770956

EMEP code 4.34 Met.No https://github.com/metno/emep-ctm

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Short summary
Air pollution's origin in cities is still a point of discussion, and approaches to assess the city's responsibility for its pollution are not harmonized and thus not comparable, resulting in sometimes contradicting interpretations. We show that methodological choices can easily lead to differences of a factor of 2 in terms of responsibility outcome and stress that methodological choices and assumptions most often lead to a systematic and important underestimation of the city's responsibility.
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