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Open AccessFeature PaperArticle

Impact of Molecular Spectroscopy on Carbon Monoxide Abundances from SCIAMACHY

DLR—German Aerospace Center, Remote Sensing Technology Institute, 82234 Oberpfaffenhofen, Germany
Author to whom correspondence should be addressed.
Remote Sens. 2020, 12(7), 1084;
Received: 13 February 2020 / Revised: 23 March 2020 / Accepted: 25 March 2020 / Published: 27 March 2020
High-quality observations have indicated the need for improved molecular spectroscopy for accurate atmospheric characterization. Line data provided by the new SEOM-IAS (Scientific Exploitation of Operational Missions—Improved Atmospheric Spectroscopy) database in the shortwave infrared (SWIR) region were used to retrieve CO total vertical columns from a selected set of nadir SCIAMACHY (SCanning Imaging Absorption SpectroMeter for Atmospheric CHartographY) observations. In order to assess the quality of the retrieval results, differences in the spectral fitting residuals with respect to the HITRAN 2016 (High-resolution TRANsmission molecular absorption) and GEISA 2015 (Gestion et Etude des Informations Spectroscopiques Atmosphériques) line lists were quantified and column-averaged dry-air CO mole fractions were compared to NDACC (Network for the Detection of Atmospheric Composition Change) and TCCON (Total Carbon Column Observing Network) ground-based measurements. In general, it was found that using SEOM-IAS line data with corresponding line models improve the spectral quality of the retrieval (smaller residuals) and increase the fitted CO columns, thereby reducing the bias to both ground-based networks. View Full-Text
Keywords: infrared; radiative transfer; molecular absorption; line-by-line infrared; radiative transfer; molecular absorption; line-by-line
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MDPI and ACS Style

Hochstaffl, P.; Schreier, F. Impact of Molecular Spectroscopy on Carbon Monoxide Abundances from SCIAMACHY. Remote Sens. 2020, 12, 1084.

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