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www.atmos-meas-tech-discuss.net/3/4355/2010/
doi:10.5194/amtd-3-4355-2010
© Author(s) 2010. This work is distributed
under the Creative Commons Attribution 3.0 License.
Retrieval of ozone profiles from GOMOS limb scattered measurements
1Finnish Meteorological Institute, Helsinki, Finland
2Belgian Institute for Space Aeronomy, Brussels, Belgium
3ACRI-ST, Sophia-Antipolis, France
4Laboratoire Atmosphères, Milieux, Observations Spatiales (LATMOS), Verrières-le-Buisson, France
5University of Saskatchewan, Saskatoon, Canada
Abstract. The GOMOS (Global Ozone Monitoring by Occultation of Stars) instrument on board the Envisat satellite measures the vertical composition of the atmosphere using the stellar occultation technique. While the night-time data of GOMOS are proved to be of good quality, the daytime observations are more challenging due to poorer signal-to-noise ratio. In this paper we present an alternative technique, which uses GOMOS limb scattered radiances instead of the stellar signal, to retrieve stratospheric ozone profiles. Like for many other limb-viewing instruments, GOMOS observations contain stray light at high altitudes. We introduce a method for removing the stray light and demonstrate its feasibility by comparing the corrected radiances against those from the OSIRIS (Optical Spectrograph & Infra Red Imaging System) instrument. For the retrieval of ozone profiles, an onion peeling method is used. The first validation results suggest that the retrieval of stratospheric ozone is possible with a typical accuracy better than 10% at 22–50 km. GOMOS has measured about 350 000 daytime profiles since 2002. The new retrieval method presented here makes this large amount of data finally available for scientific use.
Discussion Paper (PDF, 1276 KB) Interactive Discussion (Closed, 4 Comments) Final Revised Paper (AMT) Special Issue
Notice on Discussion StatusCitation: Tukiainen, S., Kyrölä, E., Verronen, P. T., Fussen, D., Blanot, L., Barrot, G., Hauchecorne, A., and Lloyd, N.: Retrieval of ozone profiles from GOMOS limb scattered measurements, Atmos. Meas. Tech. Discuss., 3, 4355-4382, doi:10.5194/amtd-3-4355-2010, 2010. Bibtex EndNote Reference Manager XML
