water cycle

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water cycle

the circulation of the earth's water, in which water evaporates from the sea into the atmosphere, where it condenses and falls as rain or snow, returning to the sea by rivers or returning to the atmosphere by evapotranspiration

Water Cycle


the continuous migration of water on earth (in its atmosphere, hydrosphere, and crust), accompanied by phase transitions of the water and possessing a more or less pronounced cyclical character.

The water cycle consists of the evaporation of water from the underlying surface and its transport by air currents from the evaporation site, condensation of water vapor, precipitation, and shifting of water in bodies of water over the land surface and within the earth’s crust. Most of the water evaporates from the oceans and returns to them; less is transported by air currents from the oceans to land. The transport of moisture evaporating from land to the oceans by air currents is slight. The water cycle is characterized quantitatively by the water balance.

A small cycle—sea (ocean) → atmosphere → sea (ocean)— and a large cycle—ocean → atmosphere → land — ocean—are distinguished according to the site of the evaporation and precipitation of water and the modes of its transport. Moisture repeatedly evaporates from the continents, is transported in the atmosphere, condenses, and again falls in the form of precipitation and again evaporates. This complex of processes is called the intracontinental cycle. An internal moisture cycle is characteristic of closed intermontane basins. The water cycle on the earth is part of the total complex of processes participating in the cycle of matter on the earth. (See alsoHYDROLOGIC CYCLE.)


water cycle

[′wȯd·ər ‚sī·kəl]
References in periodicals archive ?
A high incidence of extreme precipitation supports the scientific expectations of accelerated hydrological cycles caused by climate warming.
the amount of water from each hydrological cycle element (Munoz 2014).
Rosenfeld, "Atmosphere: aerosols, climate, and the hydrological cycle," Science, vol.
The book generalizes these known scientific assumptions to focus more on the "forces" that Pietz argues are the motivation for societies to manipulate the basin's hydrological cycle.
It disturb major parameters of hydrological cycle including precipitation, runoff and most importantly the storage of ground water aquifers.
Driven by dim sunlight, this would be directly comparable to the hydrological cycle that feeds ice caps on Earth, where water is evaporated from the oceans, falls as snow, and returns to the seas through glacial flow.
Researchers are starting to understand how the alien seas, mapped by the Cassini spacecraft, help drive a global process strikingly similar to Earth's hydrological cycle.
The potential of Ecohdrology on how the ecological aspect and biota process has effect on the hydrological cycle and is also able to identify and eliminate the human impact cycle through hydrological processes is analysed using a content analysis.
79) demonstrated that the zooplanktonic community presented higher similarity according to time (scenario/sampled period) and not to space (sampled point), which indicates that there was no persistence of the zooplanktonic species between the four scenarios during the studied hydrological cycle (Figure 4).
Plant cover plays an essential role in the maintenance and balance of the hydrological cycle (Gregory et al.
Import of electricity from Kazakhstan is a forcible measure amid dry hydrological cycle and shortage of domestically generated electricity, the Ministry of Energy and Industry said in its statement in response to the comments made by expert Ernest Karybekov, who called the work of the Kyrgyz government in electricity import talks with Kazakhstan as "economic sabotage.
Salati, <<The forest and the hydrological cycle,>> de Amazonian deforestation and climate, Chichester, John Wiley and sons, 1987, pp.

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