Verification of numerical models for hydrothermal plume water through field measurements at TAG
MetadataShow full item record
Hydrothermal vents discharge superheated, mineral rich water into our oceans, thereby providing a habitat for exotic chemosynthetic biological communities. Hydrothermal fluids are convected upwards until they cool and reach density equilibrium, at which point they advect laterally with the current. The neutrally buoyant plume layer can have length scales on the order of several kilometers, and it therefore provides the best means to detect the presence of vent fields on the seafloor, which typically have length scales on the order of a few meters. This thesis uses field measurements of the velocity, temperature and particulate anomalies associated with the TAG hydrothermal plume to demonstrate that tidal currents exert a strong impact on the plume shape, and to provide new constraints on the thermal power of the TAG hydrothermal system. The results show that the power output of the TAG system is on the order of 6000 MW, which is up to two orders of magnitude greater than previous estimates, and that there is considerably more entrainment than had previously been assumed.
Submitted in partial fulfillment of the requirements for Master of Science in Ocean Engineering at the Massachusetts Institute of Technology and the Woods Hole Oceanographic Institution September 2005
Showing items related by title, author, creator and subject.
Bemis, Karen G. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 1990-05)Estimates of the heat output of hydrothermal vents, identified along the Endeavor and Southern Segments of the Juan de Fuca Ridge, are used to evaluate the total heat flux associated with hydrothermal circulation for ...
Stochastic mapping for chemical plume source localization with application to autonomous hydrothermal vent discovery Jakuba, Michael V. (Massachusetts Institute of Technology and Woods Hole Oceanographic Institution, 2007-02)This thesis presents a stochastic mapping framework for autonomous robotic chemical plume source localization in environments with multiple sources. Potential applications for robotic chemical plume source localization ...
Lupton, John E.; Pyle, Douglas G.; Jenkins, William J.; Greene, Ronald; Evans, Leigh (American Geophysical Union, 2004-01-17)Several hydrographic stations in the vicinity of the Samoa Islands have 3He/4He above the regional background in the depth range of 1500–1800 m, indicating injection of mantle helium from a local hydrothermal source. The ...