Articles | Volume 21, issue 12
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, Aurélien Podglajen, Cristina Peña-Ortiz, and Felix Ploeger

Data sets

Version 4.2 x Level 2 data quality and description document N. Livesey, W. Read, P. Wagner, L. Froidevaux, A. Lambert, G. Manney, L. Millán Valle, H. Pumphrey, M. Santee, M. Schwartz, S. Wang, R. Fuller, R. Jarnot, B. Knosp, E. Martinez, and R. Lay

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