Faculté des sciences

Unprecedented evidence for deep convection hydrating the tropical stratosphere

Corti, T. ; Luo, B. P. ; de Reus, M. ; Brunner, D. ; Cairo, F. ; Mahoney, M. J. ; Martucci, G. ; Matthey, Renaud ; Mitev, Valentin ; dos Santos, F. H. ; Schiller, C. ; Shur, G. ; Sitnikov, N. M. ; Spelten, N. ; Vössing, H. J. ; Borrmann, S. ; Peter, T.

In: Geophysical Research Letters, 2008, vol. 35, no. L10810, p. 1-5

We report on in situ and remote sensing measurements of ice particles in the tropical stratosphere found during the Geophysica campaigns TROCCINOX and SCOUT-O3. We show that the deep convective systems penetrated the stratosphere and deposited ice particles at altitudes reaching 420 K potential temperature. These convective events had a hydrating effect on the lower tropical stratosphere due to... Plus

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    Summary
    We report on in situ and remote sensing measurements of ice particles in the tropical stratosphere found during the Geophysica campaigns TROCCINOX and SCOUT-O3. We show that the deep convective systems penetrated the stratosphere and deposited ice particles at altitudes reaching 420 K potential temperature. These convective events had a hydrating effect on the lower tropical stratosphere due to evaporation of the ice particles. In contrast, there were no signs of convectively induced dehydration in the stratosphere.