water cycle

n. The continuous process by which water is circulated throughout the earth and the atmosphere through evaporation, condensation, precipitation, and the transpiration of plants and animals. Also called hydrologic cycle.

water cycle

n (Physical Geography) 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. Also called: hydrologic cycle

water cycle

water cycle

The continuous process by which water is distributed throughout the Earth and its atmosphere. Energy from the sun causes water to evaporate from oceans and other bodies of water and from soil surfaces. Plants and animals also add water vapor to the air by transpiration. As it rises into the atmosphere, the water vapor condenses to form clouds. Rain and other forms of precipitation return water to the Earth, where it flows into bodies of water and into the ground, beginning the cycle over again. Also called hydrologic cycle.

water cycle

The circulation of water from sea to air and back again. This involves evaporation, condensation, and precipitation, and may include surface runoff, rivers, and glaciers.

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) hydrologic cycle

单词	water cycle
释义	water cycle water cycle n. The continuous process by which water is circulated throughout the earth and the atmosphere through evaporation, condensation, precipitation, and the transpiration of plants and animals. Also called hydrologic cycle. water cycle n (Physical Geography) 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. Also called: hydrologic cycle water cycle water cycle The continuous process by which water is distributed throughout the Earth and its atmosphere. Energy from the sun causes water to evaporate from oceans and other bodies of water and from soil surfaces. Plants and animals also add water vapor to the air by transpiration. As it rises into the atmosphere, the water vapor condenses to form clouds. Rain and other forms of precipitation return water to the Earth, where it flows into bodies of water and into the ground, beginning the cycle over again. Also called hydrologic cycle. water cycle The circulation of water from sea to air and back again. This involves evaporation, condensation, and precipitation, and may include surface runoff, rivers, and glaciers. water cycle 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) hydrologic cycle
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