Global Water Cycle
Nigel W. Arnell
Abstract
Nigel W. Arnell
Abstract
Abstract The global water cycle describes the circulation of water around the world from one store to another via repeated evaporation of water from land and the oceans and precipitation back to the surface. The greatest amount of water is stored in the sea, and most fresh water in ice sheets and groundwater. Much groundwater is decoupled from the current hydrological cycle, having been formed in earlier wetter periods. The ‘mobile’ part of the cycle comprises only a small proportion of the total water.
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Abstract The global water cycle describes the circulation of water around the world from one store to another via repeated evaporation of water from land and the oceans and precipitation back to the surface. The greatest amount of water is stored in the sea, and most fresh water in ice sheets and groundwater. Much groundwater is decoupled from the current hydrological cycle, having been formed in earlier wetter periods. The ‘mobile’ part of the cycle comprises only a small proportion of the total water.
Key concepts: Water cycle, Environmental science, Groundwater, Precipitation, Evaporation, Surface water, Seawater, Water circulation