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Retrieval of MetOp-A/IASI CO profiles and validation with MOZAIC data
De Wachter E., Barret B., Le Flochmoën E., Pavelin E., Matricardi M., Clerbaux C., Hadji-Lazaro J., George M., Hurtmans D., Coheur P.-F. et al
Atmospheric Measurement Techniques 5, 11 (2012) 2843-2857 - http://hal.archives-ouvertes.fr/hal-00695436
Articles dans des revues avec comité de lecture
Physique/Physique/Physique Atmosphérique et Océanique
Retrieval of MetOp-A/IASI CO profiles and validation with MOZAIC data
E. De Wachter 1, B. Barret 1, E. Le Flochmoën 1, E. Pavelin 2, M. Matricardi 3, Cathy Clerbaux 4, 5, 6, 7, Juliette Hadji-Lazaro 4, 5, 7, Maya George 4, 5, 7, D. Hurtmans 6, P.-F. Coheur 6, P. Nedelec 1, J.-P. Cammas 1
1 :  Laboratoire d'aérologie (LA)
http://www.aero.obs-mip.fr/
CNRS : UMR5560 – Observatoire Midi-Pyrénées – INSU – Université Paul Sabatier [UPS] - Toulouse III
14 avenue Edouard Belin 31400 Toulouse
France
2 :  Met Office
http://www.metoffice.gov.uk/
Met Office
FitzRoy Road Exeter Devon EX1 3PB
Royaume-Uni
3 :  European Centre for Medium Range Weather Forecast (ECMWF)
http://www.ecmwf.int
ECMWF
Shinfield Park RG1 9AX Reading
Royaume-Uni
4 :  Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS)
http://www.latmos.ipsl.fr
CNRS : UMR8190 – Université Pierre et Marie Curie [UPMC] - Paris VI – Université de Versailles Saint-Quentin-en-Yvelines – INSU
France
5 :  Institut Pierre-Simon-Laplace (IPSL)
http://www.ipsl.jussieu.fr/
CNRS : FR636 – Institut de recherche pour le développement [IRD] – CEA – CNES – INSU – Université Pierre et Marie Curie [UPMC] - Paris VI – Université de Versailles Saint-Quentin-en-Yvelines – Ecole normale supérieure de Paris - ENS Paris
4 Place Jussieu 75252 PARIS CEDEX 05
France
6 :  Spectroscopie de l'atmosphère, Service de Chimie Quantique et Photophysique
http://www.ulb.ac.be/cpm/
Université Libre de Bruxelles
Université Libre de Bruxelles 50 avenue F. D. Roosevelt B-1050 Brussels
Belgique
7 :  Université Pierre et Marie Curie - Paris 6 (UPMC)
http://www.upmc.fr/
Université Pierre et Marie Curie [UPMC] - Paris VI
4 place Jussieu - 75005 Paris
France
tact
The IASI nadir looking thermal infrared sounder onboard MetOp-A enables the monitoring of atmospheric constituents on a global scale. This paper presents a quality assessment of IASI CO profiles retrieved by the two different retrieval algorithms SOFRID and FORLI, by an intercomparison with airborne in-situ CO profiles from the MOZAIC program. A statistical analysis shows a very good agreement between the two retrieval algorithms and smoothed MOZAIC data for the lower troposphere (surface-480 hPa) with correlation coefficients r ~ 0.8, and a good agreement in the upper troposphere (480-225 hPa) with r ~ 0.7. Closer investigation of the temporal variation of the CO profiles at the airports of Frankfurt and Windhoek demonstrates that on the overall a very good agreement is found between the IASI products and smoothed MOZAIC data in terms of seasonal variability. At Frankfurt SOFRID (resp. FORLI) is positively biased by 10.5% (resp. 13.0%) compared to smoothed MOZAIC in the upper (resp. lower) troposphere, and the limited sensitivity of the IASI instrument to the boundary layer when thermal contrast is low is identified. At Windhoek, we find a good reproduction of the impact of the vegetation fires in Southern Africa from July to November by both SOFRID and FORLI, with an overestimation of the CO background values (resp. fire maxima) by SOFRID (resp. FORLI) by 12.8% (resp. ~10%). Profile comparisons at Frankfurt and Windhoek identify a reduced performance of the nighttime retrievals of both products compared to daytime retrievals.
Anglais

Atmospheric Measurement Techniques
non spécifiée
2012
5
11
2843-2857