Atmospheric Measurement Techniques
Atmospheric Measurement Techniques
AMT
Articles | Volume 19, issue 6
Articles | Volume 19, issue 6
https://doi.org/10.5194/amt-19-2163-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/amt-19-2163-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 19, issue 6
Research article
 | 
30 Mar 2026
Research article |  | 30 Mar 2026

High spatial resolution CO2 measurement using low-cost commercial sensors in Seoul megacity

JaeYoung Park, Jinho Ahn, Jeongeun Kim, and Nasrin Salehnia

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Short summary
This study shows that low-cost CO2 sensors, when individually corrected using multi-point linear regression, can achieve 1–2 % accuracy. Deployed in Seoul, they revealed local pollution patterns like idling emissions at intersections and the "piston effect" in tunnels. With proper correction, these sensors enable affordable, detailed urban CO2 monitoring.
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