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 Fit parameters and results Influence of wavelength range & reference spectrum  First results

First Heidelberg SCIA Limb Results Thomas Wagner , S. Beirle, C. Frankenberg, C. v. Friedeburg, M. Grzegorski, J. Hollwedel, S. Kühl, M. F. A . Khokhar , S. Kraus, S. Shangavi, W. Wilms-Grabe, M. Wenig, U. Platt Institut für Umweltphysik, University of Heidelberg, Germany.

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 Fit parameters and results Influence of wavelength range & reference spectrum  First results

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  1. First Heidelberg SCIA Limb ResultsThomas Wagner, S. Beirle, C. Frankenberg, C. v. Friedeburg, M. Grzegorski, J. Hollwedel, S. Kühl, M.F. A. Khokhar,S. Kraus, S. Shangavi, W. Wilms-Grabe, M. Wenig, U. PlattInstitut für Umweltphysik, University of Heidelberg, Germany •  Fit parameters and results • Influence of wavelength range & reference spectrum  First results •  Conclusions & outlook Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  2. Reference Spectra: O3: Bogumil et al., 223 & 243 K NO2: Vandaele et al., 220 K BrO: Wilmouth et al., 228 K OClO: Krominga et al., 213 K Ring: Calculated (MFC) Polarisation: Ln(Xi) & Ln(Eta) from SCIA Keydata Polynomial: Degree 5 Fraunhofer: One Limb Spectrum per orbit (at lowest tangent height) Shift: Spectrum shifted against Fraunhofer reference (linked to trace gas cross sections) Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  3. NO2 Analysis of limb spectrum at 26.5 km with respect to –2.5 km tangent height NO2 BrO O3 Ring Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  4. NO2 Analysis of limb spectrum at 26.5 km with respect to –2.5 km tangent height Xi Eta Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  5. NO2 Profiles along SCIA Orbit 4615 (DSCDs as function of tangent hight) Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  6. Comparison for NO2 analysis with limb or direct sun reference Direct sun reference Limb reference Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  7. Spectral shift during a limb scan Direct sun reference Limb reference Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  8. BrO Analysis of limb spectrum at 23.3 km with respect to 26.5 km tangent height BrO NO2 O3 Ring Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  9. BrO Analysis of limb spectrum at 23.3 km with respect to 26.5 km tangent height Xi Eta Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  10. BrO Analysis in different spectral ranges 1.03e14 1.21e14 0.44e14 1.86e14 Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  11. BrO DSCD for different wavelength ranges Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  12. Comparison for BrO analysis with limb or direct sun reference Direct sun reference Limb reference Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  13. Comparison for O3 analysis with limb or direct sun reference Direct sun reference Limb reference Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  14. Comparison of profile heights BrO NO2 O3 Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  15. O3 SCD as function of latitude and tangent height (orbit 6415, 17.01.2003) Latitude Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  16. NO2 SCD as function of latitude and tangent height (orbit 6415, 17.01.2003) Latitude Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  17. BrO SCD as function of latitude and tangent height (orbit 6415, 17.01.2003) Latitude Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

  18. Conclusions & Outlook • Development of limb UV analysis of BrO, NO2 and O3 • Polarisation sensitivity complicates DOAS fit • Broad spectral range (337 – 357 nm) seems to give most reliable (stable) results • Dependence on altitude & latitude seems to be reasonable • Determination of absolute SCDs (choice of Fraunh. reference) • Further trace gases (OClO) and wavelength ranges (vis) • Application of radiative transport and profile inversion Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de

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