Measurements of plume flow from a hydrothermal vent field

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作者：

SA Little，KD Stolzenbach，Von Herzen, Richard P.

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摘要：

Simultaneous velocity, temperature, and conductivity data were taken in the convective flow emanating from a hydrothermal vent field located at 10°56N, 103°41W on the East Pacific Rise. The horizontal profiles obtained indicate that the flow field approaches an ideal plume in the temperature and velocity distribution. Such parameters as total heat flow and maximum plume height can be estimated using either the velocity or the temperature information. The results of these independent calculations are in close agreement, yielding a total heat flow from this vent site of 3.7 ± 0.8 MW and a maximum height of 150 ± 10 m. The nonlinear effects of large temperature variations on heat capacity and volume changes slightly alter the calculations applied to obtain these values.

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关键词：

Experimental/ geophysical fluid dynamics oceanic crust oceanography seawater terrestrial heat/ plume velocity-temperature distribution E Pacific Ocean water temperature submarine plumes deep ocean dynamics seawater hydrothermal circulation mid-ocean ridge ocean spreading centre plume flow hydrothermal vent field conductivity data convective flow East Pacific Rise horizontal profiles total heat flow maximum plume height vent site nonlinear effects temperature variations heat capacity volume changes 2531 m 0 to 150 m 1.8 to 2.3 degC 24.6 to 25.4 MPa/ A9135D Terrestrial heat A9150E Seafloor processes A9210B Physical properties of seawater A9210D Dynamics of the deep ocean A9330P Pacific Ocean/ depth 2.531E+03 m altitude 0.0E+00 to 1.5E+02 m temperature 2.75E+02 to 2.75E+02 K pressure 2.46E+07 to 2.54E+07 Pa