Uncertainties in the space-based measurements of CO2 columns due to scattering in the Earth's atmosphere

By Ilse Aben, Otto Hasekamp, W. Hartmann. 2007

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Retrieval of atmospheric CO2 with enhanced accuracy and precision from SCIAMACHY: validation with FTS measurements and comparison with model results (2011, background): “1 can result in retrieval errors of about 8% [Aben et al., 2007; Schneising et al., 2008].”
The GHGSat-D imaging spectrometer (2020, background): “For example, a 5 % bias in the absolute methane column density – on the upper end of what is estimated from neglecting scattering due to aerosols, for instance (Aben et al., 2007; Butz et al., 2009; Houweling et al., 2005) – would lead to a 5 % bias in the local methane enhancement and corresponding”
Methane retrievals from Greenhouse Gases Observing Satellite (GOSAT) shortwave infrared measurements: Performance comparison of proxy and physics retrieval algorithms (2012, background): “An important source of such errors are scattering events that take place along the light path through the Earth ’ s atmosphere [ O ’ Brien and Rayner , 2002; Mao and Kawa , 2004; Houweling et al. , 2005; Frankenberg et al. , 2005; Aben et al. , 2007].”