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JOURNAL OF GEOPHYSICAL RESEARCH,
VOL. 111,
D11S02,
15 PP., 2006
doi:10.1029/2005JD006439
Ozone profiles in the high-latitude stratosphere and lower mesosphere measured by the Improved Limb Atmospheric Spectrometer (ILAS)-II: Comparison with other satellite sensors and ozonesondes
National Institute for Environmental Studies, Tsukuba, Japan
National Institute for Environmental Studies, Tsukuba, Japan
National Institute for Environmental Studies, Tsukuba, Japan
Graduate School of Environmental Studies, Nagoya University, Nagoya, Japan
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
Alfred Wegener Institute for Polar and Marine Research, Potsdam, Germany
Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany
National Institute of Polar Research, Tokyo, Japan
Central Aerological Observatory, Dolgoprudny, Russia
Central Aerological Observatory, Dolgoprudny, Russia
National Institute of Information and Communications Technology, Tokyo, Japan
National Institute of Information and Communications Technology, Tokyo, Japan
Service d'Aéronomie, Centre National de la Recherche Scientifique, Paris, France
Service d'Aéronomie, Centre National de la Recherche Scientifique, Verrières-le-Buisson, France
British Antarctic Survey/Natural Environment Research Council, Cambridge, UK
Department of Atmospheric Science, University of Wyoming, Laramie, Wyoming, USA
Instituto Nacional de Técnica Aerospacial, Madrid, Spain
Finnish Meteorological Institute, Helsinki, Finland
Finnish Meteorological Institute, Sodankylä, Finland
NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado, USA
NOAA Climate Monitoring and Diagnostics Laboratory, Boulder, Colorado, USA
Royal Netherlands Meteorological Institute, De Bilt, Netherlands
Institute of Meteorology and Water Management, Legionowo, Poland
Space and Atmospheric Sciences, Australian Antarctic Division, Kingston, Tasmania, Australia
Danish Meteorological Institute, Copenhagen, Denmark
Norwegian Institute for Air Research, Kjeller, Norway
Royal Meteorological Institute, Brussels, Belgium
Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, Colorado, USA
Remote Sensing Physics Branch, Naval Research Laboratory, Washington, D. C., USA
Science Systems and Applications, Inc., Lanham, Maryland, USA
NASA Langley Research Center, Hampton, Virginia, USA
Frontier Research Center for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan
National Institute for Environmental Studies, Tsukuba, Japan
Center for Climate System Research, University of Tokyo, Kashiwa, Japan
National Institute for Environmental Studies, Tsukuba, Japan
Division of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts, USA
Central Research Institute of Electric Power Industry, Tokyo, Japan
National Institute for Environmental Studies, Tsukuba, Japan
A solar occultation sensor, the Improved Limb Atmospheric Spectrometer (ILAS)-II, measured 5890 vertical profiles of ozone concentrations in the stratosphere and lower mesosphere and of other species from January to October 2003. The measurement latitude coverage was 54–71°N and 64–88°S, which is similar to the coverage of ILAS (November 1996 to June 1997). One purpose of the ILAS-II measurements was to continue such high-latitude measurements of ozone and its related chemical species in order to help accurately determine their trends. The present paper assesses the quality of ozone data in the version 1.4 retrieval algorithm, through comparisons with results obtained from comprehensive ozonesonde measurements and four satellite-borne solar occultation sensors. In the Northern Hemisphere (NH), the ILAS-II ozone data agree with the other data within ±10% (in terms of the absolute difference divided by its mean value) at altitudes between 11 and 40 km, with the median coincident ILAS-II profiles being systematically up to 10% higher below 20 km and up to 10% lower between 21 and 40 km after screening possible suspicious retrievals. Above 41 km, the negative bias between the NH ILAS-II ozone data and the other data increases with increasing altitude and reaches 30% at 61–65 km. In the Southern Hemisphere, the ILAS-II ozone data agree with the other data within ±10% in the altitude range of 11–60 km, with the median coincident profiles being on average up to 10% higher below 20 km and up to 10% lower above 20 km. Considering the accuracy of the other data used for this comparative study, the version 1.4 ozone data are suitably used for quantitative analyses in the high-latitude stratosphere in both the Northern and Southern Hemisphere and in the lower mesosphere in the Southern Hemisphere.
Received 26 June 2005; accepted 4 October 2005; published 24 March 2006.
Citation: (2006), Ozone profiles in the high-latitude stratosphere and lower mesosphere measured by the Improved Limb Atmospheric Spectrometer (ILAS)-II: Comparison with other satellite sensors and ozonesondes, J. Geophys. Res., 111, D11S02, doi:10.1029/2005JD006439.
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