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Now showing items 11-20 of 266
U-Th dating of lacustrine carbonates
(Massachusetts Institute of Technology, 2020)
Carbonates are prevalent in many modern and ancient lacustrine settings, but reconstructions of past lake levels or environments from such materials have been hindered by poor chronology. Uranium-thorium (U-Th) dating has ...
Protein regulation in Trichodesmium and other marine bacteria : observational and interpretive biomarkers of biogeochemical processes
(Massachusetts Institute of Technology, 2020)
Marine microbes play key roles in global biogeochemistry by mediating chemical transformations and linking nutrient cycles to one another. A major goal in oceanography is to predict the activity of marine microbes across ...
Finescale abyssal turbulence : sources and modeling
(Massachusetts Institute of Technology, 2020)
A detailed understanding of the intensity and three-dimensional spatial distribution of diabatic abyssal turbulence is germane to understanding the abyssal branch of the global overturning circulation. This thesis addresses ...
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 ...
Generation and maintenance of recirculations by Gulf Stream instabilities
(Massachusetts Institute of Technology, 1999)
This thesis studies the problems of generation and maintenance of recirculations by Gulf Stream instabilities. Observations show that the horizontal structure of the jet and its recirculations suffer significant changes ...
Cooling and internal waves on the Continental Shelf
(Massachusetts Institute of Technology, 1998)
The seasonal and interannual variability of the West Greenland current system in the Labrador Sea
(Massachusetts Institute of Technology, 2010)
The Labrador Sea, as one of a few places of deep water formation, plays an important role in the Meridional Overturning Circulation. While the interior of the Labrador Sea, where the deepest convection takes place, is known ...
A laboratory study of localized boundary mixing in a rotating stratified fluid
(Massachusetts Institute of Technology, 2003)
Oceanic observations indicate that abyssal mixing is localized in regions of rough topography. How locally mixed fluid interacts with the ambient fluid is an open question. Laboratory experiments explore the interaction ...
Dynamics of freshwater plumes: observations and numerical modeling of the wind-forced response and alongshore freshwater transport
(Massachusetts Institute of Technology, 1988)
A freshwater plume often forms when a river or an estuary discharges water onto the continental shelf. Freshwater plumes are ubiquitous features of the coastal ocean and usually leave a striking signature in the coastal ...
Buoyancy-driven circulation in the Red Sea
(Massachusetts Institute of Technology, 2014)
This thesis explores the buoyancy-driven circulation in the Red Sea, using a combination of observations, as well as numerical modeling and analytical method. The first part of the thesis investigates the formation mechanism ...