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| Titel |
Validation of six years of SCIAMACHY carbon monoxide observations using MOZAIC CO profile measurements |
| VerfasserIn |
A. T. J. Laat, R. Dijkstra, H. Schrijver, P. Nédélec, I. Aben |
| 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 ; 5, no. 9 ; Nr. 5, no. 9 (2012-09-05), S.2133-2142 |
| Datensatznummer |
250003081
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| Publikation (Nr.) |
 copernicus.org/amt-5-2133-2012.pdf |
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| Zusammenfassung |
This paper presents a validation study of SCanning Imaging Absorption SpectroMeter for Atmospheric CartograpHY (SCIAMACHY) carbon monoxide (CO)
total column measurements from the Iterative Maximum Likelihood Method
(IMLM) algorithm using vertically integrated profile aircraft measurements
obtained within the MOZAIC project for the six year time period of
2003–2008.
Overall we find a good agreement between SCIAMACHY and airborne measurements
for both mean values – also on a year-to-year basis – as well as seasonal
variations. Several locations show large biases that are attributed to local
effects like orography and proximity of large emission sources. Differences
were detected for individual years: 2003, 2004 and 2006 have larger biases
than 2005, 2007 and 2008, which appear to be related to SCIAMACHY
instrumental issues but require more research. Results from this study are
consistent with, and complementary to, findings from a previous validation
study using ground-based measurements (de Laat et al., 2010b). According to
this study, the SCIAMACHY data, if individual measurements are of sufficient
quality – good signal-to-noise, can be used to determine the spatial
distribution and seasonal cycles of CO total columns over clean areas.
Biases found over areas with strong emissions (Africa, China) could be
explained by low sensitivity of the instrument in the boundary layer and
users are recommended to avoid using the SCIAMACHY data while trying to
quantify CO burden and/or retrieve CO emissions in such areas. |
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