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| Titel |
Comparison of HDO measurements from Envisat/MIPAS with observations by Odin/SMR and SCISAT/ACE-FTS |
| VerfasserIn |
S. Lossow, J. Steinwagner, J. Urban, E. Dupuy, C. D. Boone, S. Kellmann, A. Linden, M. Kiefer, U. Grabowski, N. Glatthor, M. Höpfner, T. Röckmann, D. P. Murtagh, K. A. Walker, P. F. Bernath, T. Clarmann, G. P. Stiller |
| 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 ; 4, no. 9 ; Nr. 4, no. 9 (2011-09-13), S.1855-1874 |
| Datensatznummer |
250002094
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| Publikation (Nr.) |
 copernicus.org/amt-4-1855-2011.pdf |
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| Zusammenfassung |
| Measurements of thermal emission in the mid-infrared by Envisat/MIPAS allow
the retrieval of HDO information roughly in the altitude range between 10 km
and 50 km. From June 2002 to March 2004 MIPAS performed measurements in the
full spectral resolution mode. To assess the quality of the HDO data set
obtained during that period comparisons with measurements by Odin/SMR and
SCISAT/ACE-FTS were performed. Comparisons were made on profile-to-profile
basis as well as using seasonal and monthly averages. All in all the
comparisons yield favourable results. The largest deviations between MIPAS
and ACE-FTS are observed below 15 km, where relative deviations can
occasionally exceed 100%. Despite these deviations in the absolute amount
of HDO the latitudinal structures observed by both instruments are consistent
in this altitude range. Between 15 km and 20 km there is less good
agreement, in particular in the Antarctic during winter and spring. Also in
the tropics some deviations are found. Above 20 km there is a high
consistency in the structures observed by all three instruments. MIPAS and
ACE-FTS typically agree within 10%, with MIPAS mostly showing higher
abundances than ACE-FTS. Both data sets show considerably more HDO than SMR.
This bias can be explained basically by uncertainties in spectroscopic
parameters. Above 40 km, where the MIPAS HDO retrieval reaches its limits,
still good agreement with the structures observed by SMR is found for most
seasons. This puts some confidence in the MIPAS data at these altitudes. |
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