Articles | Volume 14, issue 6
Atmos. Meas. Tech., 14, 4689–4706, 2021
https://doi.org/10.5194/amt-14-4689-2021
Atmos. Meas. Tech., 14, 4689–4706, 2021
https://doi.org/10.5194/amt-14-4689-2021

Research article 24 Jun 2021

Research article | 24 Jun 2021

The Adaptable 4A Inversion (5AI): description and first XCO2 retrievals from Orbiting Carbon Observatory-2 (OCO-2) observations

Matthieu Dogniaux et al.

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Short summary
We present the Adaptable 4A Inversion (5AI), an implementation of the optimal estimation (OE) algorithm, relying on the Automatized Atmospheric Absorption Atlas (4A/OP) radiative transfer model, that enables the retrieval of greenhouse gas atmospheric weighted columns from infrared measurements. It is tested on a sample of Orbiting Carbon Observatory-2 observations, and its results satisfactorily compare to several reference products, thus showing the reliability of 5AI OE implementation.