Articles | Volume 10, issue 3
Atmos. Meas. Tech., 10, 759–782, 2017
https://doi.org/10.5194/amt-10-759-2017
Atmos. Meas. Tech., 10, 759–782, 2017
https://doi.org/10.5194/amt-10-759-2017

Research article 07 Mar 2017

Research article | 07 Mar 2017

Structural uncertainty in air mass factor calculation for NO2 and HCHO satellite retrievals

Alba Lorente et al.

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Short summary
Choices and assumptions made to represent the state of the atmosphere introduce an uncertainty of 42 % in the air mass factor calculation in trace gas satellite retrievals in polluted regions. The AMF strongly depends on the choice of a priori trace gas profile, surface albedo data set and the correction method to account for clouds and aerosols. We call for well-designed validation exercises focusing on situations when AMF structural uncertainty has the highest impact on satellite retrievals.