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Atmospheric Chemistry and Physics Discussions 7, 6 (2007) 18043-18111

Validation and data characteristics of methane and nitrous oxide profiles observed by MIPAS and processed with Version 4.61 algorithm

S. Payan 1, C. Camy-Peyret 1, H. Oelhaf 2, G. Wetzel 2, G. Maucher 2, C. Keim 2, M. Pirre 3, N. Huret 3, A. Engel 4, M. C. Volk 4, H. Kuellmann 5, J. Kuttippurath 5, U. Cortesi 6, G. Bianchini 6, F. Mencaraglia 6, P. Raspollini 6, G. Redaelli 7, C. Vigouroux 8, M. De Mazière 8, S. Mikuteit 2, T. Blumenstock 2, V. Velazco 5, J. Notholt 5, M. Mahieu 9, P. Duchatelet 9, D. Smale 10, S. Wood 10, N. Jones 11, C. Piccolo 12, V. Payne 13, A. Bracher 5, N. Glatthor 2, G. Stiller 2, K. Grunow 14, P. Jeseck 1, Y. Te 1, K. Pfeilsticker 15, A. Butz 15

(2007-12-17)

The ENVISAT validation programme for the atmospheric instruments MIPAS, SCIAMACHY and GOMOS is based on a number of balloon-bone, aircraft and ground-based correlative measurements. In particular the activities of validation scientists were coordinated by ESA within the ENVISAT Stratospheric Aircraft and Balloon Campaign of 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) and correlative measurements obtained from balloon and aircraft experiments as well as from satellite sensors or from ground-based instruments. The MIPAS-E CH4 values show a positive bias in the lower stratosphere of about 10%. In case of N2O no systematic deviation with respect to the validation experiments could be identified. 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.

1:	Laboratoire de Physique Moleculaire pour l'Atmosphere et l'Astrophysique (LPMAA)
	CNRS : UMR7092 – Université Pierre et Marie Curie [UPMC] - Paris VI
2:	Institutes für Meteorologie und Klimaforschung (IMK)
	Technical University of Karlsruhe
3:	Laboratoire de physique et chimie de l'environnement (LPCE)
	CNRS : UMR6115 – INSU – Université d'Orléans
4:	Institut für Atmosphäre und Umwelt
	Institut für Atmosphäre und Umwelt
5:	Institute of Environmental Physics/Institute of Remote Sensing
	Institute of Environmental Physics/Institute of Remote Sensing
6:	Istituto di Fisica Applicata "Nello Carrara"
	Istituto di Fisica Applicata "Nello Carrara"
7:	University of L'Aquila [Italy] (UNIVAQ)
	University of L'Aquila
8:	Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB)
	Belgian Institute for Space Aeronomy
9:	Institut d'Astrophysique et de Géophysique
	Institut d'Astrophysique et de Géophysique
10:	National Institute for Water and Atmospheric Research (NIWA)
	National Institute for Water and Atmospheric Research (NIWA)
11:	University of Wollongong
	University of Wollongong
12:	Atmospheric
	Oceanic and Planetary Physics
13:	Atmospheric and Environmental Research
	Atmospheric and Environmental Research
14:	Meteorologisches Institut der FU Berlin
	Meteorologisches Institut der FU Berlin
15:	Institut für Umweltphysik
	Institut für Umweltphysik

Subject

:

Sciences of the Universe/Ocean, Atmosphere

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Submitted on: Monday, 17 December 2007 08:00:00

Updated on: Friday, 10 October 2008 08:44:16