The session will emphasize observations of mass transport phenomena using terrestrial observations. In recent years, with the availability of high resolution gravity (especially superconducting gravimeter) and deformation data (especially tilt observations), detailed modelling at various spatial and temporal scales is now possible. Furthermore, the investigation of geodynamic phenomena requires a delicate removal of atmospheric, hydrological, and oceanic effects from the terrestrial observations. For both purposes, the development of appropriate models needs to be advanced. It has now been demonstrated that long-term stable terrestrial gravity observations can be used to validate satellite-derived
temporal gravity field variations, thus providing additional data for the evaluation of models on mass redistribution between the local and the global scale.

We welcome all contributions related to studies on mass redistribution using either or both ground-based gravity and deformation observations. Comparisons with satellite data are of
course included, as is the general problem of the removal and the modelling of various mass transport phenomena in geodetic applications.