The major goal of this exercise is to assess the value and the accuracy of recent measurements and to give new recommendations and guidelines for future research on UTS water vapour.
The goal of the activity is the update of the 2000 published SPARC Water Vapour Assessment (WAVAS-1) by
1. including recent satellite, field and laboratory measurements
2. consolidating evaluation of current understanding concerning processes affecting stratospheric H2O and its evolution.
Activity leaders are Karen Rosenlof (NOAA), Thomas Peter (ETH Zurich), and Gabriele Stiller (KIT).