Sciamachy solar and lunar occultation: validation of ozone, No2 and No3 profiles
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Date
2007-02
Journal Title
Journal ISSN
Volume Title
Publisher
ESRIN
Abstract
Using a global spectra fitting method by the differential
optical depth within the radiative transfer and retrieval
code SCIATRAN 2.1, vertical profiles of stratospheric
traces gases are derived from SCIAMACHY solar and
lunar occultation transmission spectra. From solar occultation observations ozone and NO2 profiles have been
retrieved, from lunar occultation measurements ozone,
NO2, and NO3 profiles have been derived. To access the
quality of the SCIAMACHY occultation retrieved products a validation study was carried out, by comparing the
retrieved ozone and NO2 profiles to correlative observations of other satellite instruments. These instruments are
the Halogen Occultation Experiment (HALOE), the second Stratospheric Aerosol and Gas Experiment (SAGE
II), and The third Polar Ozone and Aerosol Measurement (POAM III) . The NO3 profiles are compared with
results from a photochemical model scheme. The validation show good results for SCIAMACHY occultation
products. In solar occultion, the deviation of ozone is
mostly within 0 % to +10 % for ozone and within 20 % for
NO2 over a wide altitude range. In lunar occultation, the
agreement is +10% to +20 % for ozone and within 20 % ˙
for NO2 in the main part of the profiles. The NO3 results
show good agreement with the model outputs within the
accuracy of 35 %.
Description
An article published by ESRIN, Frascati, Italy (ESA SP-642,February 2007)
Keywords
Stratospheric ozone, NO2, NO3, validation, SCIAMACHY, occultation
Citation
ESRIN, Frascati, Italy (ESA SP-642,February 2007)