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Comparisons of the Orbiting Carbon Observatory-2 (OCO-2) X$_{CO_{2}}$ measurements with TCCON

Wunch, D.; Wennberg, P. O.; Osterman, G.; Fisher, B.; Naylor, B.; Roehl, M. C.; O’Dell, C.; Mandrake, L.; Viatte, C.; Kiel, M.; Griffith, D. W. T.; Deutscher, N. M.; Velazco, V. A.; Notholt, J.; Warneke, T.; Petri, C.; Maziere, M. De; Sha, M. K.; Sussmann, R.; Rettinger, M.; ... mehr

NASA's Orbiting Carbon Observatory-2 (OCO-2) has been measuring carbon dioxide column-averaged dry-air mole fraction, X$_{CO_{2}}$, in the Earth's atmosphere for over 2 years. In this paper, we describe the comparisons between the first major release of the OCO-2 retrieval algorithm (B7r) and X$_{CO_{2}}$ from OCO-2's primary ground-based validation network: the Total Carbon Column Observing Network (TCCON). The OCO-2 X$_{CO_{2}}$ retrievals, after filtering and bias correction, agree well when aggregated around and coincident with TCCON data in nadir, glint, and target observation modes, with absolute median differences less than 0.4 ppm and RMS differences less than 1.5 ppm. After bias correction, residual biases remain. These biases appear to depend on latitude, surface properties, and scattering by aerosols. It is thus crucial to continue measurement comparisons with TCCON to monitor and evaluate the OCO-2 X$_{CO_{2}}$ data quality throughout its mission.

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Volltext §
DOI: 10.5445/IR/1000071522
DOI: 10.5194/amt-10-2209-2017
Zitationen: 110
Web of Science
Zitationen: 93
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung - Atmosphärische Spurenstoffe und Fernerkundung (IMK-ASF)
Institut für Meteorologie und Klimaforschung - Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2017
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
KITopen-ID: 1000071522
HGF-Programm 12.03.01 (POF III, LK 01) Long term observations of tropospheric
Erschienen in Atmospheric measurement techniques
Verlag Copernicus Publications
Band 10
Heft 6
Seiten 2209-2238
Nachgewiesen in Scopus
Web of Science
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