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CO measurements from the ACE-FTS satellite instrument: data analysis and validation using ground-based, airborne and spaceborne observations

par Clerbaux, Cathy ;George, Michael;Turquety, Solène;Walker, Kaley;Barret, Brice ;Bernath, Peter ;Boone, Chris;Borsdorff, Tobias;Cammas, J.P.;Catoire, Valéry;Coffey, M.;Coheur, Pierre ;Deeter, Merritt;De Mazière, Martine;Drummond, James;Duchatelet, P.;Dupuy, Eric;de Zafra, Robert;Eddounia, F.;Edwards, David;Emmons, Louisa;Funke, Bernd;Gille, J.;Griffith, D.W.T.;Hannigan, James W.;Hase, Frank;Höpfner, Michael;Jones, Nick;Kagawa, A.;Kasai, Y.;Kramer, I.;Le Flochmoën, E.;Livesey, N.J.;Lopez-Puertas, Manuel;Luo, M.;Mahieu, Emmanuel;Murtagh, Donal;Nedelec, P.;Pazmino, Andrea;Pumphrey, H.;Ricaud, Philippe;Rinsland, Curtis;Robert, Claude;Schneider, M;Senten, C.;Stiller, G.;Strandberg, A.;Strong, Kimberly;Sussmann, Ralf;Thouret, Valérie;Urban, Jo;Wiacek, Aldona
Référence Atmospheric chemistry and physics, 8, 9, page (2569-2594)
Publication Publié, 2008

Article révisé par les pairs

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Résumé :

The Atmospheric Chemistry Experiment (ACE) mission was launched in August 2003 to sound the atmosphere by solar occultation. Carbon monoxide (CO), a good tracer of pollution plumes and atmospheric dynamics, is one of the key species provided by the primary instrument, the ACE-Fourier Transform Spectrometer (ACE-FTS). This instrument performs measurements in both the CO 1-0 and 2-0 ro-vibrational bands, from which vertically resolved CO concentration profiles are retrieved, from the mid-troposphere to the thermosphere. This paper presents an updated description of the ACE-FTS version 2.2 CO data product, along with a comprehensive validation of these profiles using available observations (February 2004 to December 2006). We have compared the CO partial columns with ground-based measurements using Fourier transform infrared spectroscopy and millimeter wave radiometry, and the volume mixing ratio profiles with airborne (both high-altitude balloon flight and airplane) observations. CO satellite observations provided by nadir-looking instruments (MOPITT and TES) as well as limb-viewing remote sensors (MIPAS, SMR and MLS) were also compared with the ACE-FTS CO products. We show that the ACE-FTS measurements provide CO profiles with small retrieval errors (better than 5% from the upper troposphere to 40 km, and better than 10% above). These observations agree well with the correlative measurements, considering the rather loose coincidence criteria in some cases. Based on the validation exercise we assess the following uncertainties to the ACE-FTS measurement data: better than 15% in the upper troposphere (8-12 km), than 30% in the lower stratosphere (12-30 km), and than 25% from 30 to 100 km. © Author(s) 2008.