Error budget analysis of SCIAMACHY limb ozone profile retrievals using the SCIATRAN model
Author:
Rahpoe N.ORCID, von Savigny C., Weber M.ORCID, Rozanov A.V., Bovensmann H.ORCID, Burrows J. P.ORCID
Abstract
Abstract. A comprehensive error characterisation of SCIAMACHY (Scanning Imaging Absorption Spectrometer for Atmospheric CHartographY) limb ozone profiles has been established based upon SCIATRAN transfer model simulations. The study was carried out in order to evaluate the possible impact of parameter uncertainties, e.g., in albedo, stratospheric aerosol optical extinction, temperature, pressure, pointing and ozone absorption cross section on the limb ozone retrieval. Together with the a posteriori covariance matrix available from the retrieval, total random and systematic errors are defined for SCIAMACHY ozone profiles. Main error sources are the pointing errors, errors in the knowledge of stratospheric aerosol parameters, and cloud interference. Systematic errors are on the order of 7%, while the random error amounts to 10–15% for a single profile for most part of the stratosphere. These numbers can be used for the interpretation of instrument intercomparison and validation of the SCIAMACHY limb ozone profiles in a rigorous manner.
Publisher
Copernicus GmbH
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