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URN: urn:nbn:de:swb:90-460477

Multistation intercomparison of column-averaged methane from NDACC and TCCON: impact of dynamical variability

Ostler, A.; Sussmann, R.; Rettinger, M.; Deutscher, N. M.; Dohe, S.; Hase, F.; Jones, N.; Palm, M.; Sinnhuber, B.M.

Abstract:
Dry-air column-averaged mole fractions of methane (XCH4) retrieved from ground-based solar Fourier transform infrared (FTIR) measurements provide valuable information for satellite validation, evaluation of chemical-transport models, and source-sink-inversions. In this context, Sussmann et al. (2013) have shown that midinfrared (MIR) soundings from the Network for the Detection of Atmospheric Composition Change (NDACC) can be combined with near-infrared (NIR) soundings from the Total Carbon Column Observing Network (TCCON) without the need to apply an overall intercalibration factor. However, in spite of efforts to reduce a priori impact, some residual seasonal biases were identified, and the reasons behind remained unclear. In extension to this previous work, which was based on multiannual quasi-coincident MIR and NIR measurements from the stations Garmisch (47.48° N, 11.06° E, 743 m a.s.l.) and Wollongong (34.41° S, 150.88° E, 30 m a.s.l.), we now investigate upgraded retrievals with longer temporal coverage and include three additional stations (Ny-Ålesund, 78.92° N, 11.93° E, 20 m a.s.l.; Karlsruhe, 49.08° N, 8.43° E, 110 m a.s. ... mehr


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
Jahr 2014
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
KITopen ID: 1000046047
HGF-Programm 12.03.01; LK 01
Erschienen in Atmospheric measurement techniques
Band 7
Heft 12
Seiten 4081-4101
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
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