Nighttime ozone profiles in the stratosphere and mesosphere by the Global Ozone Monitoring by Occultation of Stars on Envisat

Autor: Francis Dalaudier, Thorsten Fehr, J. L. Bertaux, Annika Seppälä, B. Theodore, Viktoria Sofieva, Filip Vanhellemont, Y. Meijer, S. Hassinen, Erkki Kyrölä, Paul Snoeij, Pekka T. Verronen, Alain Hauchecorne, Didier Fussen, Johanna Tamminen, O. Fanton d'Andon, Antoine Mangin, R. Fraisse, R. Koopman, Gilbert Barrot, L. Saavedra de Miguel, M. Guirlet, G.W. Leppelmeier
Přispěvatelé: Finnish Meteorological Institute (FMI), Service d'aéronomie (SA), Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Belgian Institute for Space Aeronomy / Institut d'Aéronomie Spatiale de Belgique (BIRA-IASB), Analytic and Computational Research, Inc. - Earth Sciences (ACRI-ST), European Space Research Institute (ESRIN), European Space Agency (ESA), European Space Research and Technology Centre (ESTEC), National Institute for Public Health and the Environment [Bilthoven] (RIVM), Astrium Satellites (EADS Astrium SAS), Astrium Satellites, Agence Spatiale Européenne = European Space Agency (ESA)
Rok vydání: 2006
Předmět:
Zdroj: Journal of Geophysical Research: Atmospheres
Journal of Geophysical Research: Atmospheres, American Geophysical Union, 2006, 111 (D24), pp.D24306. ⟨10.1029/2006JD007193⟩
Journal of Geophysical Research: Atmospheres, 2006, 111 (D24), pp.D24306. ⟨10.1029/2006JD007193⟩
ISSN: 0148-0227
2169-897X
2169-8996
DOI: 10.1029/2006jd007193
Popis: [1] The Global Ozone Monitoring by Occultation of Stars (GOMOS) instrument on board the European Space Agency’s Envisat satellite measures ozone and a few other trace gases using the stellar occultation method. Global coverage, good vertical resolution and the self-calibrating measurement method make GOMOS observations a promising data set for building various climatologies. In this paper we present the nighttime stratospheric ozone distribution measured by GOMOS in 2003. We show monthly latitudinal distributions of the ozone number density and mixing ratio profiles, as well as the seasonal variations of profiles at several latitudes. The stratospheric profiles are compared with the Fortuin-Kelder daytime ozone climatology. Large differences are found in polar areas and they can be shown to be correlated with large increases of NO2. In the upper stratosphere, ozone values from GOMOS are systematically larger than in the Fortuin-Kelder climatology, which can be explained by the diurnal variation. In the middle and lower stratosphere, GOMOS finds a few percent less ozone than Fortuin-Kelder. In the equatorial area, at heights of around 15–22 km, GOMOS finds much less ozone than Fortuin-Kelder. For the mesosphere and lower thermosphere, there has previously been no comprehensive nighttime ozone climatology. GOMOS is one of the first new instruments able to contribute to such a climatology. We concentrate on the characterization of the ozone distribution in this region. The monthly latitudinal and seasonal distributions of ozone profiles in this altitude region are shown. The altitude of the mesospheric ozone peak and the semiannual oscillation of the number density are determined. GOMOS is also able to determine the magnitude of the ozone minimum around 80 km. The lowest seasonal mean mixing ratio values are around 0.13 ppm. The faint tertiary ozone peak at 72 km in polar regions during wintertime is observed.
Databáze: OpenAIRE
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