Abstract
The presentation describes the approach developed for clear‐sky or cloud‐cleared AIRS data inversion and retrieval of the atmospheric column‐average carbon dioxide mixing ratio QCO2. Its efficiency is demonstrated in the validation effort carried out with real AIRS data for two areas in the boreal zone of Western Siberia. To retrieve the methane column amount CACH4, the original method has been proposed based on the inversion of clear‐sky IASI data in four dedicated super‐ channels or AIRS data in eight channels. The performance of CACH4 retrieval algorithms is evaluated in a case study experiment involving datasets of real IASI and AIRS measurements (Esrange/Kiruna, Sweden).
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