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Gravity current
A flow driven by horizontal pressure gradients, due typically to the flow of a fluid of one density intruding into an ambient fluid of different density. In non-rotating fluid, the head of the current travels with uniform horizontal speed C (g'H)^(1/2) in which g' is the reduced gravity, H is the current depth, and C is a constant of order unity. Sea breezes, landslides, and some instances of cold water formation are common manifestations of gravity currents in geophysical circumstances.
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- Part of Speech: noun
- Synonym(s):
- Blossary:
- Industry/Domain: Earth science
- Category: Oceanography
- Company: Marine Conservation Society
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