Articles | Volume 21, issue 6
Atmos. Chem. Phys., 21, 4599–4614, 2021
https://doi.org/10.5194/acp-21-4599-2021
Atmos. Chem. Phys., 21, 4599–4614, 2021
https://doi.org/10.5194/acp-21-4599-2021

Research article 25 Mar 2021

Research article | 25 Mar 2021

Observed decreases in on-road CO2 concentrations in Beijing during COVID-19 restrictions

Di Liu et al.

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Cited articles

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It is difficult to directly observe the COVID-19 signals in CO2 due to the strong weather induced variations. Here, we determined the on-road CO2 concentration declines in Beijing using mobile observatory data before (BC), during (DC) and after COVID-19 (AC). We chose trips with the most similar weather and calculated the enhancement, the difference between on-road and the city “background”. We showed a clear on-road CO2 decrease in DC, which is consistent with the emissions reductions in DC.
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