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The solar absorption spectra were measured by G.C. Toon and J.F. Blavier (JPL, Pasadena).

Ground-based remote sensing of the water vapor isotopologue signatures of stratospheric intrusion events. The solar absorption spectra were measured by G.C. Toon and J.F. Blavier (JPL, Pasadena). At IMK-ASF (Karlsruhe) we only analysed the spectra.

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The solar absorption spectra were measured by G.C. Toon and J.F. Blavier (JPL, Pasadena).

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  1. Ground-based remote sensing of the water vapor isotopologue signatures of stratospheric intrusion events The solar absorption spectra were measured by G.C. Toon and J.F. Blavier (JPL, Pasadena). At IMK-ASF (Karlsruhe) we only analysed the spectra. K. Yoshimura (U. Tokyo, Japan) provided IsoGSM model data

  2. Evolution of the Potential Vorticity during MOHAVE 2009 PV-plot is courtesy of T. Leblanc Stratospheric Instrusions: Oct. 20, 6 – 17 UTOct. 27, 18UT – Oct. 30, 12UT

  3. O3 and CO measured by the FTIR system: a tracer for STE O3 CO

  4. O3 and CO as measured at the tropopause by the ground-based FTIR system

  5. Day 091020

  6. Day 091020

  7. H216O and δD as measured by the FTIR system: tropospheric profiles H216O δD

  8. H216O and δDas measured in the UT by the ground-based FTIR system Is there a Deuterium enrichment during stratospheric instrusion events?

  9. H216O – δD relation as measured in the UT by the ground-based FTIR system Yes! During stratospheric instrusion events upper tropospheric HDO is enriched!

  10. H216O – δD relation as measured in the LT by the ground-based FTIR system … and the HDO enrichement is limited to the upper troposphere!

  11. Conclusion: • Ground-based FTIR H216O and δD profiles are of very good quality. • We can identify stratospheric water vapor in the upper troposphere. • Stratospheric intrusions have to be considered in climate models when modelling subtropical upper tropospheric humidity!

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