The interactions of groundwater dynamics, land surface processes, and the evolution of the lower atmosphere has gained recent attention in hydrologic and atmospheric sciences. Over the past several years, new approaches for observing and modeling large scale groundwater variations have emerged, including the unprecedented large-scale observations of terrestrial water storage variations by the Gravity Recovery and Climate Experiment and the development of groundwater modules linked to sophisticated land surface models used for climate modeling. As research is addressing these issues from a range of scale and processes description, it is now important to exchange information on the new techniques and datasets and to promote mutual collaborations among research groups. Abstracts are invited on numerical studies, experimental approaches and observations that treat components of the water and energy cycles in an integrated fashion over a wide range of time scales (diurnal to decadal) and spatial scales (column to global). Emphasis is placed on the integration of processes of the subsurface-land surface-atmosphere system. Presentations are encouraged on techniques for modeling and predicting ground water storage and fluxes on multiple scales, links to climate and global water cycle variability, groundwater remote sensing, and prospects for extending the value of existing knowledge and observational records across scales. Specific subtopics of interest include feedbacks on evapotranspiration, thermodynamics of soil moisture, infiltration and runoff, representation of soil/vegetation types, atmospheric forcing, and precipitation processes, among others. Significance is also given to the identification of structure in the mass and energy variables and scaling.