1. Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de 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 Fit parameters and results Influence of wavelength range & reference spectrum First results Conclusions & outlook

2. Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de 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)

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

18. Bremen Limb Workshop thomas.wagner@iup.uni-heidelberg.de Satellite group http://giger.uni-heidelberg.de 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