Articles | Volume 21, issue 12
Atmos. Chem. Phys., 21, 9585–9607, 2021
Atmos. Chem. Phys., 21, 9585–9607, 2021
Research article
28 Jun 2021
Research article | 28 Jun 2021

Processes influencing lower stratospheric water vapour in monsoon anticyclones: insights from Lagrangian modelling

Nuria Pilar Plaza et al.

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Cited articles

Bergman, J. W., Fierli, F., Jensen, E. J., Honomichl, S., and Pan, L. L.: Boundary layer sources for the Asian anticyclone: Regional contributions to a vertical conduit, J. Geophys. Res.-Atmos., 118, 2560–2575, 2013. a, b
Corti, T., Luo, B. P., de Reus, M., Brunner, D., Cairo, F., Mahoney, M. J., Martucci, G., Matthey, R., Mitev, V., dos Santos, F. H., Schiller, C., Shur, G., Sitnikov, N. M., Spelten, N., Vössing, H. J., Borrmann, S., and Peter, T.: Unprecedented evidence for deep convection hydrating the tropical stratosphere, Geophys. Res. Lett., 35, L10810,, 2008. a, b, c
Dessler, A. and Sherwood, S.: Effect of convection on the summertime extratropical lower stratosphere, J. Geophys. Res.-Atmos., 109, D23301,, 2004. a, b, c
Dessler, A., Hanisco, T., and Fueglistaler, S.: Effects of convective ice lofting on H2O and HDO in the tropical tropopause layer, J. Geophys. Res.-Atmos., 112, D18309,, 2007. a, b
Short summary
We study the role of different processes in setting the lower stratospheric water vapour. We find that mechanisms involving ice microphysics and small-scale mixing produce the strongest increase in water vapour, in particular over the Asian Monsoon. Small-scale mixing has a special relevance as it improves the agreement with observations at seasonal and intra-seasonal timescales, contrary to the North American Monsoon case, in which large-scale temperatures still dominate its variability.
Final-revised paper