ACP Atmospheric Chemistry and Physics ACP 1680-7324 Copernicus GmbH Göttingen, Germany 10.5194/acp-9-287-2009 Validation of ozone measurements from the Atmospheric Chemistry Experiment (ACE) Dupuy E. 1 Walker K. A. 1 2 Kar J. 2 Boone C. D. 1 McElroy C. T. 2 3 Bernath P. F. 1 4 Drummond J. R. 2 5 Skelton R. 1 McLeod S. D. 1 Hughes R. C. 1 Nowlan C. R. 2 Dufour D. G. 6 Zou J. 2 Nichitiu F. 2 Strong K. 2 Baron P. 7 Bevilacqua R. M. 8 Blumenstock T. 9 Bodeker G. E. 10 Borsdorff T. 11 Bourassa A. E. 12 Bovensmann H. 13 Boyd I. S. 14 Bracher A. 13 Brogniez C. 15 Burrows J. P. 13 Catoire V. 16 Ceccherini S. 17 Chabrillat S. 18 Christensen T. 19 Coffey M. T. 20 Cortesi U. 17 Davies J. 3 De Clercq C. 18 Degenstein D. A. 12 De Mazière M. 18 Demoulin P. 21 Dodion J. 18 Firanski B. 22 Fischer H. 9 Forbes G. 23 Froidevaux L. 24 Fussen D. 18 Gerard P. 18 Godin-Beekmann S. 25 Goutail F. 26 Granville J. 18 Griffith D. 27 Haley C. S. 28 Hannigan J. W. 20 Höpfner M. 9 Jin J. J. 29 Jones A. 30 Jones N. B. 27 Jucks K. 31 Kagawa A. 7 32 Kasai Y. 7 Kerzenmacher T. E. 2 Kleinböhl A. 13 24 Klekociuk A. R. 33 Kramer I. 9 Küllmann H. 13 Kuttippurath J. 13 25 Kyrölä E. 34 Lambert J.-C. 18 Livesey N. J. 24 Llewellyn E. J. 12 Lloyd N. D. 12 Mahieu E. 21 Manney G. L. 24 35 Marshall B. T. 36 McConnell J. C. 29 McCormick M. P. 37 McDermid I. S. 38 McHugh M. 36 McLinden C. A. 3 Mellqvist J. 30 Mizutani K. 7 Murayama Y. 7 Murtagh D. P. 30 Oelhaf H. 9 Parrish A. 39 Petelina S. V. 12 40 Piccolo C. 41 Pommereau J.-P. 26 Randall C. E. 42 Robert C. 16 Roth C. 12 Schneider M. 9 Senten C. 18 Steck T. 9 Strandberg A. 30 Strawbridge K. B. 22 Sussmann R. 11 Swart D. P. J. 43 Tarasick D. W. 3 Taylor J. R. 2 Tétard C. 15 Thomason L. W. 37 Thompson A. M. 44 Tully M. B. 45 Urban J. 30 Vanhellemont F. 18 Vigouroux C. 18 von Clarmann T. 9 von der Gathen P. 46 von Savigny C. 13 Waters J. W. 24 Witte J. C. 47 48 Wolff M. 2 Zawodny J. M. 37 Department of Chemistry, University of Waterloo, Waterloo, ON, Canada Department of Physics, University of Toronto, Toronto, ON, Canada Environment Canada, Downsview, ON, Canada Department of Chemistry, University of York, Heslington, York, UK Department of Physics and Atmospheric Science, Dalhousie University, Halifax, Canada Picomole Instruments Inc., Edmonton, AB, Canada National Institute of Information and Communications Technology (NICT), Koganei, Tokyo, Japan Naval Research Laboratory, Washington, D.C., USA Institut für Meteorologie und Klimaforschung (IMK), Forschungszentrum Karlsruhe (FZK) and Universität Karlsruhe, Karlsruhe, Germany National Institute of Water and Atmospheric Research, Lauder, New Zealand Institut für Meteorologie und Klimaforschung Atmosphärische Umweltforschung (IMK-IFU), Forschungszentrum Karlsruhe, Garmisch-Partenkirchen, Germany Institute of Space and Atmospheric Studies, University of Saskatchewan, Saskatoon, SK, Canada Institut für Umweltphysik (IUP), Universität Bremen, Bremen, Germany NIWA – Environmental Research Institute, University of Massachusetts, Amherst, MA, USA Laboratoire d'Optique Atmosphérique, CNRS – Université des sciences et technologies de Lille, Villeneuve d'Ascq, France Laboratoire de Physique et Chimie de l'Environnement, CNRS – Université d'Orléans, Orléans, France Instituto di Fisica Applicata "N. Carrara" (IFAC) del Consiglio Nazionale delle Ricerche (CNR), Sesto Fiorentino, Italy Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Bruxelles, Belgium Danish Climate Centre, Danish Meteorological Institute, Copenhagen, Denmark Earth and Sun Systems Laboratory (ESSL), National Center for Atmospheric Research (NCAR), Boulder, CO, USA Institut d'Astrophysique et de Géophysique, Université de Liège, Liège, Belgium Science and Technology Branch, Environment Canada, Centre For Atmospheric Research Experiments, Egbert, ON, Canada Environment Canada Sable Island, Dartmouth, Canada Jet Propulsion Laboratory (JPL), California Institute of Technology, Pasadena, CA, USA CNRS – Service d'Aéronomie (SA), Université Pierre et Marie Curie (UPMC) Paris VI, Paris, France CNRS – Service d'Aéronomie (SA), Verrières-le-Buisson, France School of Chemistry, University of Wollongong, Wollongong, Australia Centre for Research in Earth and Space Science, York University, Toronto, ON, Canada Department of Earth and Space Science and Engineering, York University, Toronto, ON, Canada Department of Radio and Space Science, Chalmers University of Technology, Göteborg, Sweden Harvard-Smithsonian Center for Astrophysics, Cambridge, MA, USA Fujitsu FIP Corporation, Koto, Tokyo, Japan Ice, Ocean, Atmosphere and Climate (IOAC) Program, Australian Antarctic Division, Kingston, Australia Earth Observation, Finnish Meteorological Institute, Helsinki, Finland New Mexico Institute of Mining and Technology, Socorro, NM, USA GATS, Inc., Newport News, VA, USA NASA Langley Research Center, Atmospheric Sciences Division, Hampton, VA, USA Jet Propulsion Laboratory, Table Mountain Facility, Wrightwood, CA, USA Department of Astronomy, University of Massachusetts, Amherst, MA, USA Department of Physics, La Trobe University, Victoria, Australia Atmospheric, Oceanic and Planetary Physics, Oxford University, UK Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO, USA National Institute for Public Health and the Environment (RIVM), Bilthoven, The Netherlands Department of Meteorology, Pennsylvania State University, University Park, PA, USA Atmosphere Watch Section, Bureau of Meteorology, Melboune, Vic, Australia Alfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam, Germany Science Systems and Applications, Inc., Lanham, MD, USA NASA Goddard Space Flight Center (GSFC), Greenbelt, MD, USA 16 01 2009 9 2 287 343 This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. 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This paper presents extensive {bias determination} analyses of ozone observations from the Atmospheric Chemistry Experiment (ACE) satellite instruments: the ACE Fourier Transform Spectrometer (ACE-FTS) and the Measurement of Aerosol Extinction in the Stratosphere and Troposphere Retrieved by Occultation (ACE-MAESTRO) instrument. Here we compare the latest ozone data products from ACE-FTS and ACE-MAESTRO with coincident observations from nearly 20 satellite-borne, airborne, balloon-borne and ground-based instruments, by analysing volume mixing ratio profiles and partial column densities. The ACE-FTS version 2.2 Ozone Update product reports more ozone than most correlative measurements from the upper troposphere to the lower mesosphere. At altitude levels from 16 to 44 km, the average values of the mean relative differences are nearly all within +1 to +8%. At higher altitudes (45–60 km), the ACE-FTS ozone amounts are significantly larger than those of the comparison instruments, with mean relative differences of up to +40% (about +20% on average). For the ACE-MAESTRO version 1.2 ozone data product, mean relative differences are within ±10% (average values within ±6%) between 18 and 40 km for both the sunrise and sunset measurements. At higher altitudes (~35–55 km), systematic biases of opposite sign are found between the ACE-MAESTRO sunrise and sunset observations. While ozone amounts derived from the ACE-MAESTRO sunrise occultation data are often smaller than the coincident observations (with mean relative differences down to −10%), the sunset occultation profiles for ACE-MAESTRO show results that are qualitatively similar to ACE-FTS, indicating a large positive bias (mean relative differences within +10 to +30%) in the 45–55 km altitude range. In contrast, there is no significant systematic difference in bias found for the ACE-FTS sunrise and sunset measurements.

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