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| Titel |
SCIAMACHY lunar occultation water vapor measurements: retrieval and validation results |
| VerfasserIn |
F. Azam, K. Bramstedt, A. Rozanov, K. Weigel, H. Bovensmann, G. P. Stiller, J. P. Burrows |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1867-1381
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| Digitales Dokument |
URL |
| Erschienen |
In: Atmospheric Measurement Techniques ; 5, no. 10 ; Nr. 5, no. 10 (2012-10-24), S.2499-2513 |
| Datensatznummer |
250003129
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| Publikation (Nr.) |
 copernicus.org/amt-5-2499-2012.pdf |
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| Zusammenfassung |
| SCIAMACHY (SCanning Imaging Absorption spectroMeter for Atmospheric
CHartographY) lunar occultation measurements have been used to derive vertical
profiles of stratospheric water vapor for the Southern Hemisphere in the near
infrared (NIR) spectral range of 1350–1420 nm. The focus of this study is
to present the retrieval methodology including the sensitivity studies and
optimizations for the implementation of the radiative transfer model on
SCIAMACHY lunar occultation measurements. The study also includes the
validation of the data product with the collocated measurements from two
satellite occultation instruments and two instruments measuring in limb
geometry. The SCIAMACHY lunar occultation water vapor measurement
comparisons with the ACE-FTS (Atmospheric Chemistry Experiment Fourier Transform Spectrometer) instrument have shown an agreement of 5% on
the average that is well within the reported biases of ACE in the
stratosphere. The comparisons with HALOE (Halogen Occultation Experiment) have also shown good results where
the agreement between the instruments is within 5%. The validations of the
lunar occultation water vapor measurements with MLS (Microwave Limb Sounder) instrument are
exceptionally good, varying between 1.5 to around 4%. The validations with
MIPAS (Michelson Interferometer for Passive Atmospheric Sounding) are in the range of 10%. A validated dataset of water vapor vertical
distributions from SCIAMACHY lunar occultation measurements is expected to
facilitate the understanding of physical and chemical processes in the
southern mid-latitudes and the dynamical processes related to the polar vortex. |
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