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Investigating spectroscopy and forward model improvements for atmospheric retrieval of methane in the thermal infrared

The aim of this study was to explore and consolidate the possible sources of methane (CH4) biases in retrievals from thermal infrared (TIR) sensors, to establish necessary actions and perform the related work for mitigating biases. The study distinguisged three types of error sources: spectroscopic knowledge and input data to radiative transfer models (RTM), forward model errors, and instrument biases.

For achieving this goal, the study addresses three main objectives, corresponding to three identified tasks:

France

15/029

SPASCIA

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