Articles | Volume 9, issue 9
https://doi.org/10.5194/amt-9-4355-2016
https://doi.org/10.5194/amt-9-4355-2016
Research article
 | 
06 Sep 2016
Research article |  | 06 Sep 2016

Evaluation of water vapour assimilation in the tropical upper troposphere and lower stratosphere by a chemical transport model

Swagata Payra, Philippe Ricaud, Rachid Abida, Laaziz El Amraoui, Jean-Luc Attié, Emmanuel Rivière, Fabien Carminati, and Thomas von Clarmann

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Short summary
The study deals with the budget of water vapour (H2O) at the tropical tropopause. The MOCAGE-VALENTINA assimilation tool has been used to assimilate Microwave Limb Sounder H2O space-borne measurements within the 316–5 hPa range from August 2011 to March 2013. Diagnostics are developed to assess the quality of the analyses depending on several parameters. Sensitivity studies show the improvement on the analyses when assimilating measurements of better quality, mainly over the convective areas.