Articles | Volume 18, issue 4
https://doi.org/10.5194/amt-18-929-2025
https://doi.org/10.5194/amt-18-929-2025
Research article
 | 
25 Feb 2025
Research article |  | 25 Feb 2025

A global perspective on CO2 satellite observations in high AOD conditions

Timo H. Virtanen, Anu-Maija Sundström, Elli Suhonen, Antti Lipponen, Antti Arola, Christopher O'Dell, Robert R. Nelson, and Hannakaisa Lindqvist

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Short summary
We find that small particles suspended in the air (aerosols) affect the satellite observations of carbon dioxide (CO2) made by the Orbiting Carbon Observatory-2 satellite instrument. Satellite estimates of CO2 appear to be too high for clean areas and too low for polluted areas. Our results show that CO2 and aerosols are often co-emitted, and this is partly masked out in the current retrievals. Correctly accounting for the aerosol effect is important for CO2 emission estimates by satellites.

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