Physics
Scientific paper
Jul 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990e%26psl..99..185m&link_type=abstract
Earth and Planetary Science Letters, Volume 99, Issue 1-2, p. 185-194.
Physics
23
Scientific paper
The hot buoyant fluid from a submarine vent rises as a plume, entraining fluid from the stratified ocean until a height is reached where the driving buoyant force vanishes and shortly thereafter the diluted plume fluid intrudes into the ocean interior at its equilibrium depth. While a large positive heat flux issues from the vent, the potential temperature anomaly of the horizontally spreading fluid at the equilibrium height depends on the oceanic stratification of both salinity and potential temperature, and on the salinity of the source fluid at the vent. For example, in the Atlantic Ocean, the oceanic stratification causes the spreading plume fluid to be cooler and fresher than the surrounding seawater of the same density, while in the Pacific, the spreading fluid is relatively warm. Here the well-known solution for a turbulent plume rising in a linearly stratified environment is used to obtain simple formulae for: (1) the potential temperature anomaly of the horizontally spreading fluid; (2) the heat flux associated with this injection of diluted vent water at this density level; and (3) the nondimensional solution for the evolution of tracer properties (e.g. salinity and potential temperature) in the rising plume.
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