Retrieval of MetOp-A/IASI CO profiles and validation with MOZAIC data

E. De Wachter; B. Barret; E. Le Flochmoën; E. Pavelin; M. Matricardi; Cathy Clerbaux; Juliette Hadji-Lazaro; Maya George; D. Hurtmans; P.-F. Coheur; P. Nedelec; J.-P. Cammas

HAL: hal-00695436, version 1

DOI: 10.5194/amt-5-2843-2012

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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

Publication type:

Article in peer-reviewed journal

Subject:

Physics/Physics/Atmospheric and Oceanic Physics

Title:

Retrieval of MetOp-A/IASI CO profiles and validation with MOZAIC data

Author(s):

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

Laboratory:

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

	United Kingdom

3:	European Centre for Medium Range Weather Forecast (ECMWF)

	http://www.ecmwf.int

	ECMWF

	Shinfield Park RG1 9AX Reading

	United Kingdom

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

	Belgium

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

Research team:

tact

Abstract:

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.

Fulltext language:

English

Journal:

Atmospheric Measurement Techniques

Audience:

not specified

Publication date:

2012

Volume:

Issue:

Page, identifiant, ...:

2843-2857


hal-00695436, version 1
http://hal.archives-ouvertes.fr/hal-00695436
oai:hal.archives-ouvertes.fr:hal-00695436
From: Catherine Cardon <>
Submitted on: Tuesday, 8 May 2012 15:10:52
Updated on: Tuesday, 27 November 2012 10:37:12