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Calibration of column-averaged CH4 over European TCCON FTS sites with airborne in-situ measurements

Geibel, M.; Messerschmidt, J.; Gerbig, C.; Blumenstock, T.; Chen, H.; Hase, F.; Kolle, O.; Lavrič, J. V.; Notholt, J.; Palm, M.; Rettinger, M.; Schmidt, M.; Sussmann, R.; Warneke, T.; Feist, D. G.

In September/October 2009, six European groundbased Fourier Transform Spectrometers (FTS) of the Total Carbon Column Observation Network (TCCON) were calibrated for the first time using aircraft measurements. The campaign was part of the Infrastructure for Measurement of the European Carbon Cycle (IMECC) project. During this campaign, altitude profiles of several trace gases and meteorological parameters were taken close to the FTS sites (typically within 1–2 km distance for flight altitudes below 5000 m). Profiles of CO2, CH4, CO and H2O were measured continuously. N2O, H2, and SF6 were later derived from flask measurements. The aircraft data had a vertical coverage ranging from approximately 300 to 13 000 m, corresponding to ~80% of the total atmospheric column seen by the FTS. This study summarizes the calibration results for CH4. The resulting calibration factor of 0.978±0.002 (±1 σ) from the IMECC campaign agreed very well with the results that Wunch et al. (2010) had derived for TCCON instruments in North America, Australia, New Zealand, and Japan using similar methods. By combining our results with the data of Wunch et al. (2010), the uncertainty of the calibration factor could be reduced by a factor of three (compared to using only IMECC or only Wunch et al. ... mehr

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Verlagsausgabe §
DOI: 10.5445/IR/1000038953
Veröffentlicht am 24.05.2018
DOI: 10.5194/acp-12-8763-2012
Zitationen: 38
Web of Science
Zitationen: 38
Zitationen: 38
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)
KIT-Zentrum Klima und Umwelt (ZKU)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2012
Sprache Englisch
Identifikator ISSN: 1867-1381, 1867-8548
KITopen-ID: 1000038953
HGF-Programm 12.03.01 (POF II, LK 01) Atmosphärische Variabilität und Trends
Erschienen in Atmospheric measurement techniques
Verlag Copernicus Publications
Band 12
Seiten 8763-8775
Nachgewiesen in Web of Science
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