HDO measurements with MIPAS

J. Steinwagner (1, 2) , M. Milz (1) , T. von Clarmann (1) , N. Glatthor (1) , U. Grabowski (1) , M. Höpfner (1) , G. P. Stiller (1) , T. Röckmann (2, 3)

1 IMK - Institute for Meteorology and Climate Research
2 MPIK - Max Planck Institute for Nuclear Physics
3 IMAU - Institute for Marine and Atmospheric Research [Utrecht]

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 ?D 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 ?D is between 36 ? and 111?. With values lower than 42 ? the total random error is significantly smaller than the natural variability of ?D. The data compare well with previous investigations. The MIPAS measurements now provide a unique global data set of high-quality ?D data that will provide novel insight into the stratospheric water cycle.

Domaines: Océan, Atmosphère

J. Steinwagner, M. Milz, T. von Clarmann, N. Glatthor, U. Grabowski, et al.. HDO measurements with MIPAS. Atmospheric Chemistry and Physics Discussions, 2007, 7 (1), pp.931-970. ⟨hal-00302504⟩