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.)

K. G. TIKHOTSKII

water cycle

[′wȯd·ər ‚sī·kəl]
(hydrology)
References in periodicals archive ?
By building a terrarium, we can observe the water cycle and learn how it works on Earth to grow plants.
Your teacher stands in front of the classroom and delivers an ultimatum: "If you don't understand the water cycle, your mission will fail." You study the intricacies of clear blue water, how it fuels everything in life.
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This important book explains how the Earth's supply of water moves from bodies of water to the atmosphere and to land in a process called the water cycle. Processes such as transpiration, evaporation, condensation and precipitation are explained.
"Pitter and Patter" is a vivid illustration of the water cycle in nature, ending with a two page illustrations of every step previously described in the narrative.
If we were discussing the water cycle, I would allow the students to formulate questions or hypotheses before we covered any content.
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The AWCI features the Water Cycle Integrator (WCI) as a means to combine observational data with data from numerical weather prediction models, geographical information and socioeconomic data and then translate this data into usable information, IndoAsian News Service reported.
School engagement - 79,941 pupils benefitted from school visits and opportunities to learn about water, the water cycle and water conservation ?
Axel Kleidon and Maik Renner of the Max Planck Institute for Biogeochemistry in Jena, Germany, used a simple energy balance model to determine how sensitive the water cycle is to an increase in surface temperature due to a stronger greenhouse effect and to an increase in solar radiation.
Renowned explorer and conservationist Jacques Cousteau once said 'We forget that the water cycle and the life cycle are one'.