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| Titel |
Calibration of TCCON column-averaged CO2: the first aircraft campaign over European TCCON sites |
| VerfasserIn |
J. Messerschmidt, M. C. Geibel, T. Blumenstock, H. Chen, N. M. Deutscher, A. Engel, D. G. Feist, C. Gerbig, M. Gisi, F. Hase, K. Katrynski, O. Kolle, J. V. Lavrič, J. Notholt, M. Palm, M. Ramonet, M. Rettinger, M. Schmidt, R. Sussmann, G. C. Toon, F. Truong, T. Warneke, P. O. Wennberg, D. Wunch, I. Xueref-Remy |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1680-7316
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Chemistry and Physics ; 11, no. 21 ; Nr. 11, no. 21 (2011-11-02), S.10765-10777 |
| Datensatznummer |
250010157
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| Publikation (Nr.) |
 copernicus.org/acp-11-10765-2011.pdf |
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| Zusammenfassung |
| The Total Carbon Column Observing Network (TCCON) is a ground-based network
of Fourier Transform Spectrometer (FTS) sites around the globe, where the
column abundances of CO2, CH4, N2O, CO and
O2 are measured. CO2 is constrained with a precision better
than 0.25% (1-σ). To achieve a similarly high accuracy,
calibration to World Meteorological Organization (WMO) standards is required.
This paper introduces the first aircraft calibration campaign of five
European TCCON sites and a mobile FTS instrument. A series of WMO standards
in-situ profiles were obtained over European TCCON sites via aircraft and
compared with retrievals of CO2 column amounts from the TCCON
instruments. The results of the campaign show that the FTS measurements are
consistently biased 1.1% ± 0.2% low with respect to
WMO standards, in agreement with previous TCCON calibration campaigns. The
standard a priori profile for the TCCON FTS retrievals is shown to not add a
bias. The same calibration factor is generated using aircraft profiles as a
priori and with the TCCON standard a priori. With a calibration to WMO
standards, the highly precise TCCON CO2 measurements of total column
concentrations provide a suitable database for the calibration and validation
of nadir-viewing satellites. |
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