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Atmospheric Measurement Techniques An interactive open-access journal of the European Geosciences Union

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Atmos. Meas. Tech., 5, 2751-2761, 2012
© Author(s) 2012. This work is distributed
under the Creative Commons Attribution 3.0 License.
Research article
16 Nov 2012
Validation of IASI FORLI carbon monoxide retrievals using FTIR data from NDACC
T. Kerzenmacher1, B. Dils1, N. Kumps1, T. Blumenstock2, C. Clerbaux3,4, P.-F. Coheur3, P. Demoulin5, O. García6, M. George4, D. W. T. Griffith7, F. Hase2, J. Hadji-Lazaro4, D. Hurtmans3, N. Jones7, E. Mahieu5, J. Notholt8, C. Paton-Walsh7, U. Raffalski2, T. Ridder8, M. Schneider2, C. Servais5, and M. De Mazière1 1Belgisch Instituut voor Ruimte-Aëronomie – Institut d'Aéronomie Spatiale de Belgique (IASB–BIRA), Brussels, Belgium
2Institut für Meteorologie und Klimaforschung – Atmosphärische Spurengase und Fernerkundung (IMK–ASF), Karlsruhe Institute of Technology, Karlsruhe, Germany
3Spectroscopie de l'Atmosphère, Chimie Quantique et Photophysique, Université Libre de Bruxelles (ULB), Brussels, Belgium
4UPMC Université Paris 06, Université Versailles St-Quentin, CNRS/INSU, UMR8190, LATMOS-IPSL, Paris, France
5Institute of Astrophysics and Geophysics, University of Liège, Liège, Belgium
6Izaña Atmospheric Research Centre (IARC), Agencia Estatal de Meteorología (AEMET), Izaña, Spain
7School of Chemistry, University of Wollongong, Wollongong, Australia
8Institute of Environmental Physics, University of Bremen, Bremen, Germany
Abstract. Carbon monoxide (CO) is retrieved daily and globally from space-borne IASI radiance spectra using the Fast Optimal Retrievals on Layers for IASI (FORLI) software developed at the Université Libre de Bruxelles (ULB). The IASI CO total column product for 2008 from the most recent FORLI retrieval version (20100815) is evaluated using correlative CO profile products retrieved from ground-based solar absorption Fourier transform infrared (FTIR) observations at the following FTIR spectrometer sites from the Network for the Detection of Atmospheric Composition Change (NDACC): Ny-Ålesund, Kiruna, Bremen, Jungfraujoch, Izaña and Wollongong. In order to have good statistics for the comparisons, we included all IASI data from the same day, within a 100 km radius around the ground-based stations. The individual ground-based data were adjusted to the lowest altitude of the co-located IASI CO profiles. To account for the different vertical resolutions and sensitivities of the ground-based and satellite measurements, the averaging kernels associated with the various retrieved products have been used to properly smooth coincident data products. It has been found that the IASI CO total column products compare well on average with the co-located ground-based FTIR total columns at the selected NDACC sites and that there is no significant bias for the mean values at all stations.

Citation: Kerzenmacher, T., Dils, B., Kumps, N., Blumenstock, T., Clerbaux, C., Coheur, P.-F., Demoulin, P., García, O., George, M., Griffith, D. W. T., Hase, F., Hadji-Lazaro, J., Hurtmans, D., Jones, N., Mahieu, E., Notholt, J., Paton-Walsh, C., Raffalski, U., Ridder, T., Schneider, M., Servais, C., and De Mazière, M.: Validation of IASI FORLI carbon monoxide retrievals using FTIR data from NDACC, Atmos. Meas. Tech., 5, 2751-2761, doi:10.5194/amt-5-2751-2012, 2012.
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