The evaluation of sciamachy CO and CH4 scientific data products, using ground-based FTIR measurements
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Authors
Dils, B.
De Mazière, M.
Müller, J.F.
Buchwitz, M.
De Beek, R.
Frankenberg, C.
Gloudemans, A.
Schrijver, H.
Van Den Broek, M.
Discipline
Physical sciences
Subject
Algorithms
Carbon monoxide
Data reduction
Fourier transform infrared spectroscopy
Methane
Polynomial approximation
Trace analysis
Atmospheric trace gases
Near infrared channels
Planetary boundary layers
Polynomial interpolation
Atmospheric chemistry
Audience
Scientific
Date
2006Metadata
Show full item recordDescription
In the framework of the European EVERGREEN project, three scientific algorithms, namely WFM-DOAS, IMAP-DOAS and IMLM, have been developed to retrieve the total column amounts of key atmospheric trace gases including CO and CH4 from SCIAMACHY nadir observations in its near-infrared channels. These channels offer the capability to detect trace gases in the planetary boundary layer, potentially making the associated retrieval products suited for regional source-sink studies. The retrieval products of these three algorithms, in their present status of development, have been compared to independent data from a ground-based quasi-global network of Fourier-transform infrared (FTIR) spectrometers, for the year 2003. Comparisons have been made for individual data, as well as for monthly averages. To maximize the number of coincidences that satisfy the temporal and spatial collocation criteria, the individual SCIAMACHY data points have been compared with a 3rd order polynomial interpolation of the ground-based data with time. Particular attention has been paid to the question whether the products reproduce correctly the seasonal and latitudinal variabilities of the target species. We present an overall assessment of the data quality of the currently available latest versions of the CO and CH4 total column products from the three scientific retrieval algorithms.
Citation
Dils, B.; De Mazière, M.; Müller, J.F.; Buchwitz, M.; De Beek, R.; Frankenberg, C.; Gloudemans, A.; Schrijver, H.; Van Den Broek, M. (2006). The evaluation of sciamachy CO and CH4 scientific data products, using ground-based FTIR measurements. , Proceedings of the First Atmospheric Science Conference, Issue 628,Type
Conference
Peer-Review
No
Language
eng