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Retrieval of ozone concentration profiles from SCIAMACHY limb scatter measurements in the Hartley bands: Technique and applications

Guenter Rohen(1), Christian von Savigny(1), J. W. Kaiser(2), E. J. Llewellyn(3), M. Sinnhuber(1), C. H. Jackman(4), H. Bovensmann(1) and J. P. Burrows(1)

(1) University of Bremen, Otto-Hahn-Allee 1, 28359 Bremen, Germany
(2) ECMWF, Shinfield Park, RG2 9AX Reading, Germany
(3) Institute of Space and Atmospheric Studies, 116 Science Place, S7N 5E2 Saskatoon, Canada
(4) NASA Goddard Space Flight Center, Code 916, MD 20771 Greenbelt, United States

Abstract

SCIAMACHY limb measurements in the Hartley bands of ozone are used to retrieve ozone concentration profiles at altitudes between 35 and 65 km. The method exploits the absorption of solar radiation at a set of discrete wavelengths. A non-linear Optimal Estimation scheme is used to match measured and modeled radiance profiles. Here the radiative transfer model SCIARAYS is used which is a spherical model considering up to two orders of Rayleigh scattering and includes analytical derivation of the weighting functions. The retrieval technique as well as sensitivity studies, error statistics, and validation results with HALOE and MIPAS, are presented. The results show that the retrieval technique provides reliable ozone concentration profiles in the upper stratosphere and lower mesosphere. Furthermore, the global morphology of ozone in the upper stratosphere and lower mesosphere is shown, as well as comprehensive observations of the ozone depletion during the Halloween solar proton storm in October and November 2003.

 

Workshop poster

Keywords: ESA European Space Agency - Agence spatiale europeenne, observation de la terre, earth observation, satellite remote sensing, teledetection, geophysique, altimetrie, radar, chimique atmospherique, geophysics, altimetry, radar, atmospheric chemistry