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[uhp-wel-ing] /ʌpˈwɛl ɪŋ/
an act or instance of welling up:
an upwelling of public support; an upwelling of emotion in his voice.
Oceanography. the process by which warm, less-dense surface water is drawn away from along a shore by offshore currents and replaced by cold, denser water brought up from the subsurface.
Origin of upwelling
First recorded in 1850-55; upwell + -ing1


[uhp-wel] /ʌpˈwɛl/
verb (used without object)
to well up, as water from a spring.
First recorded in 1880-85; up- + well2 Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for upwelling
Historical Examples
  • He handed over a dime with an upwelling feeling of pity in his heart.

    Sister Carrie Theodore Dreiser
  • There is in man an upwelling spring of life, energy, love, whatever you like to call it.

    More Pages from a Journal Mark Rutherford
  • Daoud tried to bring the upwelling of hope under control, to resume the Face of Steel.

  • Winter fogs, produced by upwelling cold currents, frequently blanket coastal deserts and block solar radiation.

    Deserts A. S. Walker
Word Origin and History for upwelling

1854 (adj.), 1868 (n.), from up + present participle of well (v.).

Online Etymology Dictionary, © 2010 Douglas Harper
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upwelling in Science
The rising of cold, usually nutrient-rich waters from the ocean depths to the warmer, sunlit zone at the surface. Upwelling usually occurs in the subtropics along the western continental coasts, where prevailing trade winds drive the surface water away from shore, drawing deeper water upward to take its place. Because of the abundance of krill and other nutrients in the colder waters, these regions are rich feeding grounds for a variety of marine and avian species. Upwelling can also occur in the middle of oceans where cyclonic circulation is relatively permanent or where southern trade winds cross the Equator.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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