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Impact of molecular spectroscopy on carbon monoxide abundances from tropomi

Hochstaffl, P.; Schreier, F.; Birk, M.; Wagner, G.; Feist, D. G.; Notholt, J.; Sussmann, Ralf; Té, Y.

Abstract:
The impact of SEOM–IAS (Scientific Exploitation of Operational Missions–Improved Atmospheric Spectroscopy) spectroscopic information on CO columns from TROPOMI (Tropospheric Monitoring Instrument) shortwave infrared (SWIR) observations was examined. HITRAN 2016 (High Resolution Transmission) and GEISA 2015 (Gestion et Etude des Informations Spectroscopiques Atmosphériques 2015) were used as a reference upon which the spectral fitting residuals, retrieval errors and inferred quantities were assessed. It was found that SEOM–IAS significantly improves the quality of the CO retrieval by reducing the residuals to TROPOMI observations. The magnitude of the impact is dependent on the climatological region and spectroscopic reference used. The difference in the CO columns was found to be rather small, although discrepancies reveal, for selected scenes, in particular, for observations with elevated molecular concentrations. A brief comparison to Total Column Carbon Observing Network (TCCON) and Network for the Detection of Atmospheric Composition Change (NDACC) also demonstrated that both spectroscopies cause similar columns; however, the smaller retrieval errors in the SEOM with Speed-Dependent Rautian and line-Mixing (SDRM) inferred CO turned out to be beneficial in the comparison of post-processed mole fractions with ground-based references.

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Verlagsausgabe §
DOI: 10.5445/IR/1000126020
Veröffentlicht am 16.11.2020
Originalveröffentlichung
DOI: 10.3390/rs12213486
Scopus
Zitationen: 1
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2020
Sprache Englisch
Identifikator ISSN: 2072-4292
KITopen-ID: 1000126020
Erschienen in Remote sensing
Band 12
Heft 21
Seiten Art.-Nr.: 3486
Schlagwörter infrared; radiative transfer; molecular absorption; line-by-line; line profiles
Nachgewiesen in Scopus
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