The Arctic-HYDRA networking activity was launched during the IPY period by representatives of national hydrological institutes and academic departments in all Arctic countries. The consortium aims to produce a new quantitative picture of the state of the Arctic Hydrological Cycle at a time when rapid Arctic warming is affecting several domains of the climate system. Other important tasks of the group include support for pan-Arctic hydrological and meteorological modelling efforts and the continuation and expansion of existing observational networks. The present report is based on material compiled and discussed during a series of workshops held by Arctic-HYDRA members in the years 2006-2009
