High Elevations (HE) is an initiative within the Coordinated Energy and water cycle Observations Project (CEOP) of the World Climate Research Programme (WCRP) Global Energy and Water cycle Experiment (GEWEX).The Scientific Implementation Plan (SIP) of CEOP (http://www.eol.ucar.edu/projects/ceop/dm/new) identifies HE as a “regional study”. HE intends to be a concerted, international and interdisciplinary effort aimed at furthering knowledge on physical and dynamic processes at high elevations, which intends to contribute to global climate and water cycle studies. The goal of HE is to study multi-scale variability of energy and water cycles in high elevation areas while improving corresponding observations, modelling and data management. In this context, the term “high elevations” should be understood to include altitudes above the timberline, high plateaus, rough reliefs, low atmospheric pressure and low average temperature.