August 11, 2025AGU AdvancesOpen Access

Satellite‐Based Analysis of CO2 Emissions From Global Cities: Regional, Economic, and Demographic Attributes

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Discussion

Satellite data shows regional and socioeconomic variations in CO2 emissions from urban areas, suggesting new verification methods.

Satellite estimates reveal urban CO2 emissions vary significantly across regions and income levels, indicating complex dynamics at play.
Analysis of 54 global cities shows agreements with bottom-up data within 7%, yet highlights discrepancies in emission estimates.
Using remotely-sensed observations from OCO-3 and ground-based data, the cross-sectional flux approach provides a comprehensive emissions profile.
Findings underscore the importance of satellite monitoring in improving accuracy of urban emission estimates and guiding mitigation efforts.

Ahn et al. (2025) studied this question.

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