water cycle A sketch of the water cycle.

Water cycles from the ocean to the atmosphere through evaporation, is transported in condensed form as clouds with the winds and returns to land and water as precipitation.

The biosphere plays an important role in the water cycle. Evapo-transpiration from plants is the major component of the water cycle's pathway from the land to the atmosphere; direct evaporation from land is comparatively small. Evaporation from the sea, however, is quite significant.

The link between land and ocean is represented by run-off from rivers. This closes the water cycle.

© 2000 M.Tomczak

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