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Mechanisms and variability of salt transport in partially-stratified estuaries
(Massachusetts Institute of Technology, 2000)
The variability of salt transport determines the variation of the length of the salinity intrusion and the large-scale density gradient in an estuary. This thesis contains three studies that address salt transport and the ...
The upper ocean response to the monsoon in the Arabian Sea
(Massachusetts Institute of Technology, 2000)
Estimation of the upper ocean heat budget from one year of observations at a moored array in the north central Arabian Sea shows a rough balance between the horizontal advection and time change in heat when the one-dimensional ...
The effect of changing topological constraints on poleward ocean heat transport induced by plate tectonics over the last 600 million years
(Massachusetts Institute of Technology, 2000)
The changing configurations of continents due to plate tectonics is thought to be responsible for some of the variation in climate over the last 600 Ma. Different topological constraints on the oceans may affect their ...
An estimate of the upwelling rate in the tropical Pacific Ocean
(Massachusetts Institute of Technology, 2000)
An inverse box model of the tropical Pacific Ocean from 321S - 10N is constructed from two zonal and six meridional hydrographic sections. This data is supplemented with LADCP data close to the equator where geostrophy ...
Forging asteroid-meteorite relationships through reflectance spectroscopy
(Massachusetts Institute of Technology, 2000)
Near-infrared spectra (~0.90 to ~1.65 microns) were obtained for 196 main-belt and near-Earth asteroids to determine plausible meteorite parent bodies. These spectra, when coupled with previously obtained visible data, ...
The effect of protozoan grazers on the cycling of polychlorinated biphenyls (PCBs) in marine systems
(Massachusetts Institute of Technology, 2000)
Processes affecting organic carbon distribution and composition can control the speciation of organic contaminants such as polychlorinated biphenyls (PCBs) and ultimately determine their residence time in a particular ...
Large scale oceanic circulation and fluxes of freshwater, heat, nutrients and oxygen
(Massachusetts Institute of Technology, 2000)
A new, global inversion is used to estimate the large scale oceanic circulation based on the World Ocean Circulation Experiment and Java Australia Dynamic Experiment hydrographic data. A linear inverse "box" model is used ...
The roles of mixing, geothermal heating, and surface buoyancy forcing in ocean meridional overturning dynamics
(Massachusetts Institute of Technology, 2000)
The dynamics of the oceanic large-scale meridional overturning circulation are investigated through a series of numerical experiments using an idealized single-hemisphere general circulation model. In addition to the ...
Space-time rupture properties of large earthquakes
(Massachusetts Institute of Technology, 2000)
Slow earthquakes have been hypothesized to be compound events, i.e. comprised of both an ordinary earthquake and a smooth moment-release transient of longer duration. Low-frequency normal-mode based studies which support ...
Thermal evolution of a compositionally stratified earth, including plates
(Massachusetts Institute of Technology, 2000)
For subduction to occur, plates must bend and slide past overriding plates along fault zones. This deformation is associated with significant energy dissipation, which changes the energy balance of mantle convection and ...