Atmos. Chem. Phys. Discuss., 7, 931-970, 2007
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This discussion paper has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP.
HDO measurements with MIPAS
J. Steinwagner1,3, M. Milz1, T. von Clarmann1, N. Glatthor1, U. Grabowski1, M. Höpfner1, G. P. Stiller1, and T. Röckmann2,3
1Institute for Meteorology and Climate Research, Research Center Karlsruhe, Germany
2Institute for Marine and Atmospheric Research Utrecht, The Netherlands
3Max Planck Institute for Nuclear Physics, Heidelberg, Germany

Abstract. We have used high spectral resolution spectroscopic measurements from the MIPAS instrument on the Envisat satellite to simultaneously retrieve vertical profiles of H2O and HDO in the stratosphere and uppermost troposphere. A thorough error analysis of the retrievals confirms that reliable δD data can be obtained up to an altitude of ~45 km. Averaging over multiple orbits and thus over longitudes further reduces the random part of the error. The absolute total error of averaged δD is between 36 ‰ and 111‰. With values lower than 42 ‰ the total random error is significantly smaller than the natural variability of δD. The data compare well with previous investigations. The MIPAS measurements now provide a unique global data set of high-quality δD data that will provide novel insight into the stratospheric water cycle.

Citation: Steinwagner, J., Milz, M., von Clarmann, T., Glatthor, N., Grabowski, U., Höpfner, M., Stiller, G. P., and Röckmann, T.: HDO measurements with MIPAS, Atmos. Chem. Phys. Discuss., 7, 931-970, doi:10.5194/acpd-7-931-2007, 2007.
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