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| Titel |
Validation of version-4.61 methane and nitrous oxide observed by MIPAS |
| VerfasserIn |
S. Payan, C. Camy-Peyret, H. Oelhaf, G. Wetzel, G. Maucher, C. Keim, M. Pirre, N. Huret, A. Engel, M. C. Volk, H. Kuellmann, J. Kuttippurath, U. Cortesi, G. Bianchini, F. Mencaraglia, P. Raspollini, G. Redaelli, C. Vigouroux, M. Mazière, S. Mikuteit, T. Blumenstock, V. Velazco, J. Notholt, E. Mahieu, P. Duchatelet, D. Smale, S. Wood, N. Jones, C. Piccolo, V. Payne, A. Bracher, N. Glatthor, G. Stiller, K. Grunow, P. Jeseck, Y. Té, A. Butz |
| 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 ; 9, no. 2 ; Nr. 9, no. 2 (2009-01-19), S.413-442 |
| Datensatznummer |
250006734
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| Publikation (Nr.) |
 copernicus.org/acp-9-413-2009.pdf |
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| Zusammenfassung |
| The ENVISAT validation programme for the atmospheric instruments MIPAS,
SCIAMACHY and GOMOS is based on a number of balloon-borne, aircraft,
satellite and ground-based correlative measurements. In particular the
activities of validation scientists were coordinated by ESA within the
ENVISAT Stratospheric Aircraft and Balloon Campaign or ESABC. As part of a
series of similar papers on other species [this issue] and in parallel to
the contribution of the individual validation teams, the present paper
provides a synthesis of comparisons performed between MIPAS CH4 and
N2O profiles produced by the current ESA operational software
(Instrument Processing Facility version 4.61 or IPF v4.61, full resolution
MIPAS data covering the period 9 July 2002 to 26 March 2004) and correlative
measurements obtained from balloon and aircraft experiments as well as from
satellite sensors or from ground-based instruments. In the middle
stratosphere, no significant bias is observed between MIPAS and correlative
measurements, and MIPAS is providing a very consistent and global picture of
the distribution of CH4 and N2O in this region. In average, the
MIPAS CH4 values show a small positive bias in the lower stratosphere
of about 5%. A similar situation is observed for N2O with a positive
bias of 4%. In the lower stratosphere/upper troposphere (UT/LS) the
individual used MIPAS data version 4.61 still exhibits some unphysical
oscillations in individual CH4 and N2O profiles caused by the
processing algorithm (with almost no regularization). Taking these problems
into account, the MIPAS CH4 and N2O profiles are behaving as
expected from the internal error estimation of IPF v4.61 and the estimated
errors of the correlative measurements. |
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