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What are the major features (i.e., stocks and fluxes) of the pan-arctic water balance and how do they vary over time and space? How will the arctic hydrologic cycle respond to natural variability and global change? What are the direct impacts of arctic hydrology changes on nutrient biogeochemistry and ecosystem structure and function? What are the hydrologic cycle feedbacks to the oceans and atmosphere in the face of natural variabil-
Vörösmarty et al. (Mon,) studied this question.