Atmospheric Chemistry and Physics www.atmos-chem-phys.net 1680-7316 1680-7324 7 18 2007 10.5194/acp-7-4807-2007 http://www.atmos-chem-phys.net/7/4807/2007/ http://www.atmos-chem-phys.net/7/4807/2007/acp-7-4807-2007.html http://www.atmos-chem-phys.net/7/4807/2007/acp-7-4807-2007.pdf 4807 4867 2007-09-21 Geophysical validation of MIPAS-ENVISAT operational ozone data U. Cortesi u.cortesi@ifac.cnr.it J. C. Lambert C. De Clercq G. Bianchini T. Blumenstock A. Bracher E. Castelli V. Catoire K. V. Chance M. De Mazière P. Demoulin S. Godin-Beekmann N. Jones K. Jucks C. Keim T. Kerzenmacher H. Kuellmann J. Kuttippurath M. Iarlori G. Y. Liu Y. Liu I. S. McDermid Y. J. Meijer F. Mencaraglia S. Mikuteit H. Oelhaf C. Piccolo M. Pirre P. Raspollini F. Ravegnani W. J. Reburn G. Redaelli J. J. Remedios H. Sembhi D. Smale T. Steck A. Taddei C. Varotsos C. Vigouroux A. Waterfall G. Wetzel S. Wood Istituto di Fisica Applicata "N. Carrara" (IFAC) del Consiglio Nazionale delle Ricerche (CNR), Firenze, Italy Belgian Institute for Space Aeronomy (BIRA-IASB), Brussels, Belgium Institut für Meteorologie und Klimaforschung (IMK), Forschungszentrum Karlsruhe GmbH (FZK), Universität Karlsruhe, Karlsruhe, Germany Institute of Environmental Physics and Remote Sensing, University of Bremen (IUP/IFE), Bremen, Germany Istituto di Scienze dell'Atmosfera e del Clima (ISAC) del CNR, Bologna, Italy Laboratoire de Physique et Chimie de l'Environnement (LPCE), CNRS-Université d'Orléans, Orléans, France Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA Institut d'Astrophysique et de Géophysique, University of Liège, Liège, Belgium Service d'Aéronomie/IPSL, CNRS-Université Pierre et Marie Curie, Paris, France University of Wollongong, Wollongong, Australia University of Toronto, Toronto, Canada CETEMPS, Universitá di L'Aquila, Dipartimento di Fisica, L'Aquila, Italy Institute of Atmospheric Physics, CAS, Beijing,China Jet Propulsion Laboratory, Table Mountain Facility, Wrightwood, CA, USA National Institute for for Public Health and the Environment, RIVM – LVM, Bilthoven, The Netherlands University of Oxford, Oxford, UK CCLRC Rutherford Appleton Laboratory (RAL), UK University of Leicester, Leicester, UK National Institute for Water and Air Research Ltd., Lauder, New Zealand University of Athens, Faculty of Physics, Dept of Applied Physics, Greece now at: ESA-ESTEC, Noordwijk, The Netherlands The Michelson Interferometer for Passive Atmospheric Sounding (MIPAS), on-board the European ENVIronmental SATellite (ENVISAT) launched on 1 March 2002, is a middle infrared Fourier Transform spectrometer measuring the atmospheric emission spectrum in limb sounding geometry. The instrument is capable to retrieve the vertical distribution of temperature and trace gases, aiming at the study of climate and atmospheric chemistry and dynamics, and at applications to data assimilation and weather forecasting. MIPAS operated in its standard observation mode for approximately two years, from July 2002 to March 2004, with scans performed at nominal spectral resolution of 0.025 cm−1 and covering the altitude range from the mesosphere to the upper troposphere with relatively high vertical resolution (about 3 km in the stratosphere). Only reduced spectral resolution measurements have been performed subsequently. MIPAS data were re-processed by ESA using updated versions of the Instrument Processing Facility (IPF v4.61 and v4.62) and provided a complete set of level-2 operational products (geo-located vertical profiles of temperature and volume mixing ratio of H2O, O3, HNO3, CH4, N2O and NO2) with quasi continuous and global coverage in the period of MIPAS full spectral resolution mission. In this paper, we report a detailed description of the validation of MIPAS-ENVISAT operational ozone data, that was based on the comparison between MIPAS v4.61 (and, to a lesser extent, v4.62) O3 VMR profiles and a comprehensive set of correlative data, including observations from ozone sondes, ground-based lidar, FTIR and microwave radiometers, remote-sensing and in situ instruments on-board stratospheric aircraft and balloons, concurrent satellite sensors and ozone fields assimilated by the European Center for Medium-range Weather Forecasting. A coordinated effort was carried out, using common criteria for the selection of individual validation data sets, and similar methods for the comparisons. This enabled merging the individual results from a variety of independent reference measurements of proven quality (i.e. well characterized error budget) into an overall evaluation of MIPAS O3 data quality, having both statistical strength and the widest spatial and temporal coverage. Collocated measurements from ozone sondes and ground-based lidar and microwave radiometers of the Network for the Detection Atmospheric Composition Change (NDACC) were selected to carry out comparisons with time series of MIPAS O3 partial columns and to identify groups of stations and time periods with a uniform pattern of ozone differences, that were subsequently used for a vertically resolved statistical analysis. The results of the comparison are classified according to synoptic and regional systems and to altitude intervals, showing a generally good agreement within the comparison error bars in the upper and middle stratosphere. Significant differences emerge in the lower stratosphere and are only partly explained by the larger contributions of horizontal and vertical smoothing differences and of collocation errors to the total uncertainty. Further results obtained from a purely statistical analysis of the same data set from NDACC ground-based lidar stations, as well as from additional ozone soundings at middle latitudes and from NDACC ground-based FTIR measurements, confirm the validity of MIPAS O3 profiles down to the lower stratosphere, with evidence of larger discrepancies at the lowest altitudes. The validation against O3 VMR profiles using collocated observations performed by other satellite sensors (SAGE II, POAM III, ODIN-SMR, ACE-FTS, HALOE, GOME) and ECMWF assimilated ozone fields leads to consistent results, that are to a great extent compatible with those obtained from the comparison with ground-based measurements. Excellent agreement in the full vertical range of the comparison is shown with respect to collocated ozone data from stratospheric aircraft and balloon instruments, that was mostly obtained in very good spatial and temporal coincidence with MIPAS scans. This might suggest that the larger differences observed in the upper troposphere and lowermost stratosphere with respect to collocated ground-based and satellite O3 data are only partly due to a degradation of MIPAS data quality. They should be rather largely ascribed to the natural variability of these altitude regions and to other components of the comparison errors. By combining the results of this large number of validation data sets we derived a general assessment of MIPAS v4.61 and v4.62 ozone data quality. A clear indication of the validity of MIPAS O3 vertical profiles is obtained for most of the stratosphere, where the mean relative difference with the individual correlative data sets is always lower than ±10%. Furthermore, these differences always fall within the combined systematic error (from 1 hPa to 50 hPa) and the standard deviation is fully consistent with the random error of the comparison (from 1 hPa to ~30–40 hPa). A degradation in the quality of the agreement is generally observed in the lower stratosphere and upper troposphere, with biases up to 25% at 100 hPa and standard deviation of the global mean differences up to three times larger than the combined random error in the range 50–100 hPa. The larger differences observed at the bottom end of MIPAS retrieved profiles can be associated, as already noticed, to the effects of stronger atmospheric gradients in the UTLS that are perceived differently by the various measurement techniques. However, further components that may degrade the results of the comparison at lower altitudes can be identified as potentially including cloud contamination, which is likely not to have been fully filtered using the current settings of the MIPAS cloud detection algorithm, and in the linear approximation of the forward model that was used for the a priori estimate of systematic error components. The latter, when affecting systematic contributions with a random variability over the spatial and temporal scales of global averages, might result in an underestimation of the random error of the comparison and add up to other error sources, such as the possible underestimates of the p and T error propagation based on the assumption of a 1 K and 2% uncertainties, respectively, on MIPAS temperature and pressure retrievals. At pressure lower than 1 hPa, only a small fraction of the selected validation data set provides correlative ozone data of adequate quality and it is difficult to derive quantitative conclusions about the performance of MIPAS O3 retrieval for the topmost layers. Bernath, P. F., McElroy, C. T., Abrams, M. C., Boone, C. D., Butler, M., Camy-Peyret, C., Carleer, M., Clerbaux, C., Coheur, P.-F., Colin, R., DeCola, P., De Mazière, M., Drummond, J. R., Dufour, D., Evans, W. F. J., Fast, H., Fussen, D., Gilbert, K., Jennings, D. E., Llewellyn, E. J., Lowe, R. P., Mahieu, E., McConnell, J C., McHugh, M., McLeod, S. D., Michaud, R., Midwinter, C., Nassar, R., Nichitiu, F., Nowlan, C., Rinsland, C. P., Rochon, Y. J., Rowlands, N., Semeniuk, K., Simon, P., Skelton, R., Sloan, J. J., Soucy, M. A., Strong, K., Tremblay, P., Turnbull, D., Walker, K. A., Walkty, I., Wardle, D. A., Wehrle, V., Zander, R., and Zou, J.: Atmospheric Chemistry Experiment (ACE): Mission overview, Geophys. Res. Lett., 32, L15S01, doi:10.1029/2005GL022386, 2005. Bianchini, G., Cortesi, U., Palchetti, L., and Pascale, E.: SAFIRE-A (Spectroscopy of the Atmosphere by Far-Infrared Emission – Airborne): Optimized Instrument Configuration and New Assessment of Improved Performance, Appl. Optics, 43(14), 2962–2977, 2004. Bianchini, G., Boscaleri, A., Carli, B., Mencaraglia, F., Palchetti, L., and Pascale, E.: Infrared Balloon Experiment: improved instrumental configuration and assessment of instrument performance, Appl. Optics, 45, 1041–1051, 2006. Blumenstock, T., Mikuteit, S., Hase, H., Boyd, I., Calisesi, Y., DeClercq, C., Lambert, J.-C., Koopman, R., McDermid, S., Oltmans, S., Swart, D., Raffalski, U., Schets, H., De Muer, D., Steinbrecht, W., Stubi, R., and Wood, S.: Comparison of MIPAS \chemO_3 profiles with ground-based measurements, ESA SP-562, Proceedings Second Atmospheric Chemistry Validation of ENVISAT Workshop (ACVE-2), ESRIN, Frascati, Italy, pp. 157–163, 2004. Boyd, I. S., Bodeker, G. E., Connor, B. J., Swart, D. P. J., and Brinksma, E. J.: An assessment of ECC ozonesondes operated using 1$%$ and 0.5$%$ KI kathode solutions at Lauder, New Zealand, Geophys. Res. Lett., 5, 2409–2412, 1998. Boone, C. D., Nassar, R., Walker, K. A., Rochon, Y., McLood, S. D., Rinsland, C. P., and Bernath, P. F.: Retrievals for the atmospheric chemistry experiment Fourier-transform spectrometer, Appl. Optics, 44(33), 7218–7231, 2005. Borchi, F. and Pommereau, J.-P.: Evaluation of ozonesondes, HALOE, SAGE II and III, ODIN-OSIRIS and SMR, and ENVISAT-GOMOS, -SCIAMACHY and -MIPAS ozone profiles in the tropics from SAOZ long duration balloon measurements in 2003 and 2004, Atmos. Chem. Phys., 7, 2671–2690, 2007. Bruhl, C., Drayson, R. S., Russel III, J. M., Crutzen, P. J., McInerney, J. M., Purcell, P. N., Claude, H., Gernandt, H., McGee, T. J., McDermid, I. S., and Gunson, M. R.: Halogen Occultation Experiment ozone channel validation, J. Geophys. Res., 101(D6), 10 217–10 240, 1996. Calisesi, Y., Soebijanta, V. T., and van Oss, R.: Regridding of remote soundings: Formulation and application to ozone profile comparison, J. Geophys. Res., 110, D23306, doi:10.1029/2005JD006122, 2005. Chu, W. P., McCormick, M. P., Lenoble, J., Brogniez, C., and Pruvost, P.: SAGE II Inversion Algorithm, J. Geophys. Res., 94(D6), 8339–8352, 1989. Connor, B. J., Parrish, A. , Tsou, J.-J., and McCormick, M. P.: Error analysis for the ground-based microwave ozone measurements during STOIC, J. Geophys. Res., 100, 9283–9291, 1995. Cortesi, U., Blom, C. E., Camy-Peyret, C., Chance, K., Davies, J., Goutail, F., Kuttippurath, J., McElroy, C. T., Mencaraglia, F., Oelhaf, H., Petritoli, A., Pirre, M., Pommereau, J. P., Ravegnani, F., Renard, J. B., and Strong, K.: MIPAS ozone validation by stratospheric balloon and aircraft measurements, ESA SP-562, Proceedings Second Atmospheric Chemistry Validation of ENVISAT Workshop (ACVE-2), ESRIN, Frascati, Italy, 2004. Crutzen, P. J., Grooß, J.-U., Brühl, C., Müller, R., and Russell III, J. M.: A Reevaluation of the Ozone Budget with HALOE UARS Data: No Evidence for the Ozone Deficit, Science, 268, 705–708, 1995. Cunnold, D. M., Chu, W. P., Barnes, R. A., McCormick, M. P., and Veiga, R. E.: Validation of SAGE II Ozone Measurements, J. Geophys. Res., 94, 8447–8460, 1989 Danilin, M. Y., Ko, M. K. W., Froidevaux, L., Santee, M. L., Lyjak, L. V., Bevilacqua, R. M., Zawodny, J. M., Sasano, Y., Irie, H., Kondo, Y., Russell III, J. M., Scott, C. J., and Read, W. G.: Trajectory hunting as an effective technique to validate multiplatform measurements: Analysis of the MLS, HALOE, SAGE-II, ILAS, and POAM-II data in October�November 1996, J. Geophys. Res., 107, 4420, doi:10.1029/2001JD002012, 2002. De Clercq, C. and Lambert, J.-C.: A forward model of limb infrared emission spectra in a two-dimensional atmosphere, in Proc. Atmospheric Science Conference, Frascati, Italy, 8–12 May 2006, ESA SP-628, 2006. Dethof, A. and Hélm, E. V.: Ozone assimilation in the ERA-40 reanalysis project, Q. J. Roy. Meteor. Soc., 130(603), 2851–2872, 2004. Dragani, R., Redaelli, G., Mariotti, A., Rudakov, V. V., MacKenzie, A. R., Stefanutti, L., and Visconti, G.: High resolution stratospheric tracer fields reconstructed with Lagrangian techniques: a comparative analysis of predictive skill, J. Atmos. Sci., 59, 1943–1958, 2002 Dudhia, A., Jay, V. L., and Rodgers, C. D.: Microwindow Selection for High-Spectral-Resolution Sounders, Appl. Optics, 41, 3665–3673, 2002. Hedin, A.: Extension of the MSIS thermosphere model into the middle and lower atmosphere, J. Geophys. Res., 96, 1159–1172, 1991. Errera, Q. and Fonteyn, D.: Four-dimensional variational chemical assimilation of CRISTA stratospheric measurements, J. Geophys. Res., 106(D11), 12 253–12 265, 2001. Fischer, H. and Oelhaf, H.: Remote sensing of vertical profiles of atmospheric trace constituents with MIPAS limb-emission spectrometers, Appl. Optics, 35(16), 2787–2796, 1996. Fischer, H., Blom, C. E., Oelhaf, H., Carli, B., Carlotti, M., Delbouille, L., Ehhalt, D., Flaud, J.-M., Isaksen, I., Lopez-Puertas, M., McElroy, C. T., and Zander, R.: ENVISAT, MIPAS An instrument for Atmospheric Chemistry and Climate Research, edited by: Readings, C. and Harris, R. A., ESA Publications Division, ESTEC, P.O. Box 299, 2200, AG Nordwijk, The Netherlands, SP-1229, 2000. Fischer, H., Birk, M. , Blom, C. E., Carli, B., Carlotti, M., von Clarmann, T., Delbouille, L., Dudhia, A., Ehhalt, D., Endemann, M., Flaud, J.-M., Gessner, R., Kleinert,A., Koopmann, R., Langen, J., Lopez-Puertas, M., Mosner, P., Nett, H., Oelhaf, H., Perron,G., Remedios, J., Ridolfi, M., Stiller, G., and Zander, R.: MIPAS: an instrument for atmospheric and climate research, Atmos. Chem. Phys. Discuss., 7, 8795–8893, 2007. Fix, A., Ehret, G., Flentje, H., Poberaj, G., Gottwald, M., Finkenzeller, H., Bremer, H., Bruns, M., Burrows, J. P., Kleinböhl, A., Küllmann, H., Kuttippurath, J., Richter, A., Wang, P., Heue, K.-P., Platt, U., and Wagner, T.: SCIAMACHY validation by aircraft remote measurements: Design, execution, and first results of the SCIA-VALUE mission, Atmos. Chem. Phys., 5, 1273–1289, 2005. Fonteyn, D., Bonjean, S., Chabrillat, S., Daerden, F., and Errera, Q.: 4D-VAR chemical data assimilation of ENVISAT chemical products (BASCOE): Validation support issues, in: Proc. Envisat Validation Workshop, ESA Scientific Publication SP-531, 2003. Friedl-Vallon, F., Maucher, G., Seefeldner, M., Trieschmann, O., Kleinert, A., Lengel, A., Keim, C., Oelhaf, H., and Fischer, H.: Design and characterisation of the balloon-borne Michelson Interferometer for Passive Atmospheric Sounding (MIPAS-B2), Appl. Optics, 43(16), 3335–3355, 2004. Frisk, U., Hagstroem, M., Ala-Laurinaho, J., Andersson, S., Berges, J.-C., Chabaud, J.-P., Dahlgren, M., Emrich, A., Florén, H.-G., Florin, G., Fredrixon, M., Gaier, T., Haas, R., Hirvonen, T., Hjalmarsson, \AA., Jakobsson, B., Jukkala, P., Kildal, P. S., Kollberg, E., Lassing, J., Lecacheux, A., Lehikoinen, P., Lehto, A., Mallat, J., Marty, C., Michet, D., Narbonne, J., Nexon, M., Olberg, M., Olofsson, A. O. H., Olofsson, G., Origné, A., Petersson, M., Piironen, P., Pons, R., Pouliquen, D., Ristorcelli, I., Rosolen, C., Rouaix, G., Räisänen, A. V., Serra, G., Sjöberg, F., Stenmark, L., Torchinsky, S., Tuovinen, J., Ullberg, C., Vinterhav, E., Wadefalk, N., Zirath, H., Zimmermann, P., and Zimmermann, R.: The ODIN satellite I. Radiometric design and test, Astronomy and Astrophysics, 402, L27–L34, doi:10.1051/0004-6361:20030335, 2003. Fussen, D., Vanhellemont, F., Dodion, J., Bingen, C., Walker, K. A., Boone, C. D., McLeod, S. D., and Bernath, P. F.: Initial intercomparison of ozone and nitrogen dioxide number density profiles retrieved by the ACE-FTS and GOMOS occultation experiments, Geophys. Res. Lett., 32, L16S02, doi:10.1029/2005GL022468, 2005. Geer, A. J., Lahoz, W. A., Bekki, S., Bormann, N., Errera, Q., Eskes, H. J., Fonteyn, D., Jackson, D. R., Juckes, M. N., Massart, S., Peuch, V. H., Rharmili, S., and Segers, A.: The ASSET intercomparison of ozone analyses: method and first results, Atmos. Chem. Phys., 6, 5445–5474, 2006. Glatthor, N., von Clarmann, T., Fischer, H., Funke, B., Gil-López, S., Grabowski, U., Höpfner, M., Kellmann, M. S., Linden, A., López-Puertas, M., Mengistu Tsidu, G., Milz, M., Steck, T., Stiller, G. P., and Wang, D. Y.: Retrieval of stratospheric ozone profiles from MIPAS/ENVISAT limb emission spectra: a sensitivity study, Atmos. Chem. Phys., 6, 2767–2781, 2006. Godin, S., Carswell, A. I., Donovan, D. P., Claude, H., Steinbrecht, W., McDermid, I. S., McGee, T. J., Gross, M. R., Nakane, H., Swart, D. P. J., Bergwerff, H. B., Uchino, O., von der Gathen, P., and Neuber, R.: Ozone Differential Absorption Lidar Algorithm Intercomparison, Appl. Optics, 38, 6225–6236, 1999. Hase, F.: Inversion von Spurengasprofilen aus hochaufgelösten bodengebundenen FTIR-Messungen in Absorption, Wissenschaftliche Berichte, FZK Report No. 6512, Forschungszentrum Karlsruhe, Germany, 2000. Hase, F., Hannigan, J. W., Coffey, M. T., Goldman, A., Höpfner, M., Jones, N. B., Rinsland, C. P., and Wood, S. W.: Intercomparison of retrieval codes used for the analysis of high-resolution, ground-based FTIR measurements, J. Quant. Spectrosc. Rad. Trans., 87, 25–52, 2004. Hervig, M. and McHugh, M.: Cirrus detection using HALOE measurements, Geophys. Res, Lett., 26(6), 719–722, 1999. Höpfner, M., Stiller, G. P., Kuntz, M., von Clarmann, T., Echle, G., Funke, B., Glatthor, N., Hase, F., Kemnitzer, H., and Zorn, S.: The Karlsruhe optimized and precise radiative transfer algorithm, Part II: Interface to retrieval applications, SPIE Proceedings, 3501, 186–195, 1998. Höpfner, M., Blom, C. E., Echle, G., Glatthor, N., Hase, F., and Stiller, G.: Retrieval simulations for MIPAS-STR measurements, edited by: Smith, W. L., IRS 2000: Current Problems in Atmospheric Radiation; Proc. Int. Radiation Symp., St.Petersburg, Russia, 24–29 July 2000, Hampton, Va; DEEPAK Publ., S.1121–1124, 2001. Höpfner, M., Oelhaf, H., Wetzel, G., Friedl-Vallon, F., Kleinert, A., Lengel, A., Maucher, G., Nordmeyer, H., Glatthor, N., Stiller, G., von Clarmann, T., Fischer, H., Kröger, C., and Deshler, T.: Evidence of scattering of tropospheric radiation by PSCs in mid-IR limb emission spectra: MIPAS-B observations and KOPRA simulations, Geophys. Res. Lett., 29(8), 1278, doi:10.1029/2001GL014443, 2002. Johnson, D. G., Jucks, K. W., Traub, W. A., and Chance, K. V.: The Smithsonian stratospheric far-infrared spectrometer and data reduction system, J. Geophys. Res., 100, 3091–3106, 1995. Keckhut, P., McDermid, S., Swart, D., McGee, T., Godin-Beekmann, S., Adriani, A., Barnes, J., Baray, J.-L., Bencherif, H., Claude, H., Di Sarra, A., Fiocco, G., Hansen, G., Hauchecorne, A., Leblanc, T., Lee, C. H., Pal, S., Megie, G., Nakane, H., Neuber, R., Steinbrecht, W., and Thayer, J.: Review of ozone and temperature lidar validations performed within the framework of the Network for the Detection of Stratospheric Change., J. Environ. Monit., 6, 721�733, 2004. Keim, C., Blom, C. E., von der Gathen, P., Gulde, T., Höpfner, M., Liu, G. Y., Oulanovski, A., Piesch, C., Ravegnani, F., Sartorius, C., Schlager, H., and Volk, C. M.: Validation of MIPAS-ENVISAT by correlative measurements of MIPAS-STR, Proc. ACVE-2 meeting, 3–7 May 2004, Frascati, Italy, ESA SP-562, 2004. Kerridge, B. J., Goutail, F., Bazureau, A., Wang, D.-Y., Bracher, A., Weber, M., Bramstedt, H., Siddans, R., Latter, B. G., Reburn, W. J., Jay, V. L., Dethof, A., Payne, V. H., et al.: MIPAS ozone validation by satellite intercomparison, ESA SP-562, Proceedings Second Atmospheric Chemistry Validation of ENVISAT Workshop (ACVE-2), ESRIN, Frascati, Italy, 2004. Kleinert, A., Aubertin, G., Perron, G., Birk, M., Wagner, G., Hase, F., Nett, H., and Poulin, R.: MIPAS Level 1B algorithms overview: operational processing and characterisation, Atmos. Chem. Phys., 7, 1395–1406, 2007. Komhyr, W. D., Barnes, R. A., Brothers, G. B., Lathrop, J. A., and Opperman, D. P.: Electrochemical concentration cell ozonesonde performance evaluation during STOIC 1989, J. Geophys. Res., 100, 9231–9244, 1995. Kurylo, M. J. and Zander, R. J.: The NDSC – Its status after ten years of operation, in: Proceedings of the Quadrennial Ozone Symposium 2000, Hokkaido Univ., Sapporo, Japan, edited by: NASDA, 167–168, 2001. Kuttippurath, J., Bremer, H., Burrows, J., Kleinboehl, A., Kuellmann, H., Kuenzi, K., Notholt, J., Sinnhuber , M., von Savigny, C., Lautié, N., Murtagh, D., Urban, J., Milz, M., Stiller, G., Petelina, S., de La No\"e, J., Le Flochmoen, E., and Ricaud, P.: Intercomparison of ozone profile measurements from ASUR, SCIAMACHY, MIPAS, OSIRIS, and SMR, J. Geophys. Res., 112, D09311, doi:10.1029/2006JD007830, 2007. Lucke, R. L., Korwan, D., Bevilacqua, R. M., Hornstein, J. S., Shettle, E. P., Chen, D. T., Daehler, M., Lumpe, J. D., Fromm, M. D., Debrestian, D., Neff, B., Squire, M., König-Langlo, G., and Davies, J.: The Polar Ozone and Aerosol Measurement (POAM III) Instrument and Early Validation Results, J. Geophys. Res., 104, 18 785–18 799, 1999. Lumpe, J. D., Bevilacqua, R. M., Hoppel, K. W., and Randall, C. E.: POAM III Retrieval Algorithm and Error Analysis, J. Geophys. Res., 107(D21), 4575–4607, 2002. Mauldin III, L. E., Zaun, N. H., McCormick, M. P., Guy, J. H., and Vaughn, W. R.: Stratospheric Aerosol and Gas Experiment II instrument: A functional description, Opt. Eng., 24, 307–312, 1985. McCornick, M. P.: SAGE II: An Overview, Adv. Space Res., 7, 219–226, 1987. McDermid, I. S., Bergwerff, J. B., Bodeker, G., Boyd, I. S., Brinksma, E. J., Connor, B. J., Farmer, R., Gross, M. R., Kimvilakani, P., Matthews, W. A., McGee, T. J., Ormel, F. T., Parrish, A., Singh, U., Swart, D. P. J., and Tsou, J. J.: OPAL: Network for the Detection of Stratospheric Change Ozone Profiler Assessment at Lauder, New Zealand: II. Intercomparison of revised results, J. Geophys. Res., 103(D22), 28 693–28 699, 1998. McHugh, M., Magill, B., Walker, K. A., Boone, C. D., Bernath, P. F., and Russell III, J. M.: Comparison of atmospheric retrievals from ACE and HALOE, Geophys. Res. Lett., 32, L15S10, doi:10.1029/2005GL022403, 2005. Mees, J., Crewell, S., Nett, H., de Lange, G., van de Stadt, H., Kuipers, J. J., and Panhuyzen, R. A.: ASUR – An Airborne SIS-Receiver for Atmospheric Measurements at 625 to 720 GHz, IEEE Trans. Microwave Theory Tech., 43(11), 2543–2548, 1995. Moreau, G., Robert, C., Catoire, V., Chartier, M., Camy-Peyret, C., Huret, N., Pirre, M., Pomathiod, L., and Chalumeau, G.: SPIRALE: a multispecies in situ balloon-borne instrument with six tunable diode laser spectrometers, Appl. Optics, 44(28), 5972–5989, 2005. Morris, G. A., Gleason, J. F., Russel III, J. M., Schoeberl, M. R., McCormick, M. P.: A comparison of HALOE v19 with SAGE II v6.00 ozone observations using trajectory mapping, J. Geophys. Res., 107(D13), 4177–4186, 2002. Munro, R., Siddans, R., Reburn, W. J., and Kerridge, B. J.: Direct measurements of tropospheric ozone from space, Nature, 392, 168–171, 1998. Murtagh, D., Frisk, U., Merino, F., Ridal, M., Jonsson, A., Stegman, J., Eriksson, G. W. P., Jiménez, C., Megie, G., de la No\"e\"e, J., Ricaud, P., Baron, P., Pardo, J. R., Hauchcorne, A., Llewellyn, E. J., Degenstein, D. A., Gattinger, R. L., Lloyd, N. D., Evans, W. F. J., McDade, I. C., Haley, C. S., Sioris, C., von Savigny, C., Solheim, B. H., McConnell, J. C., Strong, K., Richardson, E. H., Leppelmeier, G. W., Kyrö, E., Auvinen, H., and Oikarinen, L.: An overview of the Odin atmospheric mission, Can. J. Phys., 80(4), 309–319, 2002. Oelhaf, H., Friedl-Vallon, F., Kleinert, A., Lengel, A., Maucher, G., Nordmeyer, H., Wetzel, G., Zhang, G., and Fischer, H.: ENVISAT validation with MIPAS-B, in: Proc. ENVISAT Validation Workshop, 9–13 December 2002, ESRIN, Frascati, Italy, CD-ROM, vol. SP-531, ESA Publications Division, ESTEC, Postbus 299, 2200AG Noordwijk, The Netherlands, 2003. Petelina, S. V., Llewellyn, E. J., Walker, K. A., Degenstein, D. A., Boone, C. D., Bernath, P. F., Haley, C. S., von Savigny, C., Lloyd, N. D., and Gattinger, R. L.: Validation of ACE-FTS stratospheric ozone profiles against Odin/OSIRIS measurements, Geophys. Res. Lett., 32, L15S06, doi:10.1029/2005GL022377, 2005. Piesch, C., Gulde, T., Sartorius, C., Friedl-Vallon, F., Seefeldner, M., Wölfel, M., Blom, C. E., and Fischer, H.: Design of a MIPAS instrument for high-altitude aircraft, Proc. of the 2nd Internat. Airborne Remote Sensing Conference and Exhibition, ERIM, Ann Arbor, MI, Vol. II, 199–208, 1996. Pougatchev, N. S., Connor, B. J., and Rinsland, C. P.: Infrared measurement of the ozone vertical distribution above Kitt Peak, J. Geophys. Res., 100(D8), 16 689–16 698, 1995. Pyle, J., Shepherd, T., Bodeker, G. E., Canziani, P., Dameris, M., Forster, P. M., Gruzdev, A., Müller, R., Muthama, N., Pitari, G., and Randel, W. J.: Ozone and climate: a review of interconnections, in Special report on safeguarding the ozone layer and global climate system, IPCC/TEAP, Cambridge, 2005. Randall, C. E., Rusch, D. W., Bevilacqua, R. M., Hoppel, K. W., Lumpe, J. D., Shettle, E., Thompson, E., Deaver, L., Zawodny, J., Kyro, E., Johnson, B., Kelder, H., Dorokhov, V. M., Koenig- Langlo, G., and Gil, M.: Validation of POAM III ozone: comparisons with ozonesonde and satellite data, J. Geophys. Res., 108(D12), 4367, doi:10.1029/2002JD002944, 2003. Raspollini, P., Belotti, C., Burgess, A., Carli, B., Carlotti, M., Ceccherini, S., Dinelli, B. M., Dudhia, A., Flaud, J.-M., Funke, B., Höpfner, M., López-Puertas, M., Payne, V., Piccolo, C., Remedios, J. J., Ridolfi, M., and Spang, R.: MIPAS level 2 operational analysis, Atmos. Chem. Phys., 6, 5605–5630, 2006. Redaelli, G.: Lagrangian techniques for the analysis of stratospheric measurements, PhD thesis, University of L'Aquila, Italy, 1997. Redaelli, G., Cortesi, U., Bianchini, G., Castelli, E., Dinelli, B. M., Grassi, B., Mencaraglia, F., Taddei, A., and Visconti, G.: Multi-technique comparison of MIPAS \chemO_3 measurements with correlative data obtained by FT-FIR measurements during the ENVISAT stratospheric aircraft and balloon campaign, Proceedings Third Atmospheric Chemistry Validation of ENVISAT Workshop (ACVE-3), ESA-ESRIN, Frascati, Italy, 4–7 December 2006, ESA Special Publication SP-642, 2006. Ridolfi, M., Blum, U., Carli, B., Catoire, V., Ceccherini, S., De Clercq, C., Fricke, K. H., Iarlori, M., Kerridge, B., Keckhut, P., Lambert, J.�C., Meijer, Y., Mona, L., Oelhaf, H., Pappalardo, G., Pirre, M., Rizi, V., Robert, C., Swart11, D., von Clarmann, T., Waterfall, A., and Wetzel, G.: Geophysical validation of temperature retrieved by the ESA processor from MIPAS/ENVISAT atmospheric limb-emission measurements, Atmos. Chem. Phys., 7, 4459–4487, 2007. Rinsland, C. P., Connor, B. J., Jones, N. B., Boyd, I., Matthews, W. A., Goldman, A., Murcray, F. J., Murcray, D. G., David, S. J., and Pougatchev, N. S.: Comparison of infrared and Dobson total ozone columns measured from Lauder, New Zealand, Geophys. Res. Lett., 23(9), 1025–1028, 1996. Rinsland, C. P., Jones, N. B., Connor, B. J., Logan, J. A., Pougatchev, N. S., Goldman, A., Murcray, F. J., Stephen, T. M., Pine, A. S., Zander, R., Mahieu, E., and Demoulin, P.: Northern and southern hemisphere ground-based infrared measurements of tropospheric carbon monoxide and ethane, J. Geophys Res., 103(21), 28 197–28 217, 1998. Rodgers, C. D.: Characterization and error analysis of profiles retrieved from remote sounding measurements, J. Geophys. Res., 95, 5587–5595, 1990. Rodgers, C. D.: Inverse methods for atmospheric sounding: Theory and practice, 238 pp., World Scientific, Inc., 2000. Rodgers, C. D. and Connor, B. J.: Intercomparison of remote sounding instruments, J. Geophys. Res., 108(D3), 4116–4130, 2003. Rothman, L. S., Jacquemart, D., Barbe, A., Chris Bennerc, D., Birk, M., Brown, L. R., Carleer, M. R., Chackerian Jr., C., Chance, K., Coudert, L. H., Dana, V., Devi, V. M., Flaud, J.-M., Gamache, R. R., Goldman, A., Hartmann, J.-M., Jucks, K. W., Maki, A. G., Mandin, J.-Y. Massie, S. T., Orphal, J., Perrin, A., Rinsland, C. P., Smith, M. A. H., Tennyson, J., Tolchenov, R. N., Toth, R. A., Vander Auwera, J., Varanasi, P., and Wagner, G.: The HITRAN 2004 molecular spectroscopic database, J. Quant. Spect. Rad. Trans., 96, 139–204, 2005. Russell III, J. M., Gordley, L. L., Park, J. H., Drayson, S. R., Hesketh, W. D., Cicerone, R. J., Tuck, A. F., Frederick, J. E., Harries, J. E., and Crutzen, P. J.: The Halogen Occultation Experiment, J. Geophys. Res., 98, 10 777–10 798, 1993. Sembhi, H., Remedios, J. J., and Raspollini, P.: Validation of cloud-free tropical UTLS MIPAS ozone and water vapour, Proceedings of ASC 2006, ESA/ESRIN, Frascati, Italy, 8–12 May 2006. Smit, H. G. J. and Sträter, W.: Jülich ozone sonde intercomparison experiment 2000 (JOSIE-2000), World Meteorological Organization Global Atmospheric Watch (WMO-GAW), TD N. 1225, 2004. Solomon, S.: Stratospheric Ozone depletion: a review of concept and history, Rev. Geophys., 37, 275–316, 1999. Spang R., Remedios, J. J., and Barkley, M. P.: Colour indices for the detection and differentiation of cloud types in infra-red limb emission spectra, Adv. Space Res., 33(7), 1041–1047, 2004. Taddei, A., Redaelli, G., Grassi, B., and Visconti, G.: Self-consistency analysis of MIPAS data using the Trajectory Hunting Technique (THT), Proceedings of the Atmospheric Science Conference, 8–12 May 2006, ESA-ESRIN, Frascati, Italy, 2006. Tsou, J. J., Connor, B. J., Parrish, A., McDermid, I. S., and Chu, W. P.: Ground-based microwave monitoring of middle atmosphere ozone: Comparison to lidar and Stratospheric and Gas Experiment II satellite observations, J. Geophys. Res., 100, 3005–3016, 1995. Tsou, J. J., Connor, B. J., Parrish, A, Pierce, R. B., Boyd, I. S., Bodeker, G. E., Chu, W. P., Russell, J. M., Swart, D. P. J., and McGee, T. J.: NDSC millimeter wave ozone observations at Lauder, New Zealand, 1992–1998: Improved methodology, validation, and variation study, J. Geophys. Res., 105(D19), 24 263–24 281, 2000. Urban, J., Lautié, N., Le Flochemoen, E., Jiménez, C., Eriksson, P., de la No\"e\"e, J., Dupuy, E., Ekström, M., El Amraoui, L., Frisk, U., Murtagh, D., Olberg, M., and Ricaud, P.: Odin/SMR limb observations of stratospheric trace gases: Level 2 processing of \chemClO, \chemN_2O, \chemHNO_3, and \chemO_3, J. Geophys. Res., 110, D14307, doi:10.1029/2004JD005741, 2005. Vigouroux, C., De Mazière, M., Errera, Q., Chabrillat, S., Mahieu, E., Duchatelet, P., Wood, S., Smale, D., Mikuteit, S., Blumenstock, T., Hase, F., and Jones, N.: Comparisons between ground-based FTIR and MIPAS N2O and HNO3 profiles before and after assimilation in BASCOE, Atmos. Chem. Phys., 7, 377–396, 2007. von Clarmann, T.: Validation of remotely sensed profiles of atmospheric state variables: strategies and terminology, Atmos. Chem. Phys., 6, 12, 4311–4320, 2006. von der Gathen, P., Rex, M., Harris, N. R. P., Lucic, D., Knudsen, B. M., Braathen, G. O., De Backer, H., Fabian, R., Fast, H., Gil, M., Kyro, E., Mikkelsen, I. S., Rummekainen, M., Stahelin, J., and Varotsos, C.: Observational evidence for chemical ozone depletion over the Arctic in winter 1991–92, Nature, 375(6527), 131–134, 1995. Yushkov, V., Oulanovsky, A., Lechenuk, N., Roudakov, I., Arshinov, K., Tikhonov, F., Stefanutti, L., Ravegnani, F., Bonafe, U., and Georgiadis, T.: A chemiluminescent analyzer for stratospheric measurements of the ozone concentration (FOZAN), J. Atmos. Ocean. Tech., 16(10), 1345–1350, 1999. Walker, K. A., Randall, C. E., Trepte, C. R., Boone, C. D., and Bernath, P. F.: Initial validation comparisons for the Atmospheric Chemistry Experiment (ACE-FTS), Geophys. Res. Lett., 32, L16S04, doi:10.1029/2005GL022388, 2005. Wang, H. J., Cunnold, D. M., Thomason, L. W., Zawodny, J. M., and Bodeker, G. E.: Assessment of SAGE version 6.1 ozone data quality, J. Geophys. Res., 107(D23), 4691–4709, 2002. Wetzel, G., Oelhaf, H., Friedl-Vallon, F., Kleinert, A., Lengel, A., Maucher, G., Nordmeyer, H., Ruhnke, R., Nakajima, H., Sasano, Y., Sugita, T., and Yokota, T.: Intercomparison and validation of ILAS-II version 1.4 target parameters with MIPAS-B measurements, J. Geophys. Res., 111, D11S06, doi:10.1029/2005JD006287, 2006.