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| Titel |
Using XCO2 retrievals for assessing the long-term consistency of NDACC/FTIR data sets |
| VerfasserIn |
S. Barthlott, M. Schneider, F. Hase, A. Wiegele, E. Christner, Y. González, T. Blumenstock, S. Dohe, O. E. García, E. Sepúlveda, K. Strong, J. Mendonca, D. Weaver, M. Palm, N. M. Deutscher, T. Warneke, J. Notholt, B. Lejeune, E. Mahieu, N. Jones, D. W. T. Griffith, V. A. Velazco, D. Smale, J. Robinson, R. Kivi, P. Heikkinen, U. Raffalski |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 8, no. 3 ; Nr. 8, no. 3 (2015-03-25), S.1555-1573 |
| Datensatznummer |
250116232
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| Publikation (Nr.) |
 copernicus.org/amt-8-1555-2015.pdf |
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| Zusammenfassung |
| Within the NDACC (Network for the Detection of Atmospheric Composition
Change), more than 20 FTIR (Fourier-transform infrared) spectrometers, spread
worldwide, provide long-term data records of many atmospheric trace gases. We
present a method that uses measured and modelled XCO2 for assessing
the consistency of these NDACC data records. Our XCO2 retrieval setup
is kept simple so that it can easily be adopted for any NDACC/FTIR-like
measurement made since the late 1950s. By a comparison to coincident TCCON
(Total Carbon Column Observing Network) measurements, we empirically
demonstrate the useful quality of this suggested NDACC XCO2 product
(empirically obtained scatter between TCCON and NDACC is about 4‰
for daily mean as well as monthly mean comparisons, and the bias is
25‰). Our XCO2 model is a simple regression model fitted
to CarbonTracker results and the Mauna Loa CO2 in situ records. A
comparison to TCCON data suggests an uncertainty of the model for monthly
mean data of below 3‰. We apply the method to the NDACC/FTIR
spectra that are used within the project MUSICA (multi-platform remote
sensing of isotopologues for investigating the cycle of atmospheric water)
and demonstrate that there is a good consistency for these globally
representative set of spectra measured since 1996: the scatter between the
modelled and measured XCO2 on a yearly time scale is only
3‰. |
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