The atmosphere-landsurface interface is the locus of the vast majority of all human activities: we live at this interface. Improved modelling of the exchanges of energy, water and momentum at this critical boundary depends upon 1. (i) better understanding of how to scale the physical processes 2. (ii) better agreement amongst existing numerical schemes 3. (iii) provision of adequate data with which to validate improved atmosphere-landsurface models. This paper reviews progress in these tasks.