Articles | Volume 16, issue 13
https://doi.org/10.5194/acp-16-8125-2016
https://doi.org/10.5194/acp-16-8125-2016
Research article
 | 
06 Jul 2016
Research article |  | 06 Jul 2016

The millennium water vapour drop in chemistry–climate model simulations

Sabine Brinkop, Martin Dameris, Patrick Jöckel, Hella Garny, Stefan Lossow, and Gabriele Stiller

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Calvo, N., Garcia, R. R., Randel, W. J., and Marsh, D. R.: Dynamical mechanism for the increase in tropical upwelling in the lowermost tropical stratosphere during warm ENSO events, J. Atmos. Sci., 67, 2331–2340, 2010.
Deckert, R. and Dameris, M.: Higher tropical SSTs strengthen the tropical upwelling via deep convection, Geophys. Res. Lett., 35, L10813, https://doi.org/10.1029/2008GL033719, 2008.
Dessler, A. E., Schoeberl, M. R., Wang, T., Davis, S. M., Rosenlof, K. H., and Vernier, J.-P.: Variations of stratospheric water vapor over the past three decades, J. Geophys. Res., 119, 12588–12598, https://doi.org/10.1002/2014JD021712, 2014.
Eichinger, R., Jöckel, P., and Lossow, S.: Simulation of the isotopic composition of stratospheric water vapour – Part 2: Investigation of HDO/H2O variations, Atmos. Chem. Phys., 15, 7003–7015, https://doi.org/10.5194/acp-15-7003-2015, 2015
Eyring, V. and Lamarque, J.-F.: Global chemistry-climate modeling and evaluation, EOS T. Am. Geophys. Un., 93, 539, https://doi.org/10.1029/2012EO510012, 2012.
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Short summary
This study investigates the water vapour decline in the stratosphere beginning in the year 2000 and other similarly strong stratospheric water vapour reductions. The driving forces are tropical sea surface temperature (SST) changes due to coincidence with a preceding ENSO event and supported by the west to east change of the QBO. There are indications that both SSTs and the specific dynamical state of the atmosphere contribute to the long period of low water vapour values from 2001 to 2006.
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