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We found an error with the 2016 and 2017 0.25 degree CO2 files downloaded from NASA, which was determined to be due to missing radiance files in the production of CO2 files on the NASA systems. This was corrected in March, 2025. The error did not exist in 0.1 degree files.
Figure 1: Time series of yearly global Tg CO2 from different versions of QFED.
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