Search
Now showing items 15801-15810 of 15825
Geological and thermochronological evolution of the lower crust of southern Africa
(Massachusetts Institute of Technology, 2002)
Geochronological, thermochronological and isotopic studies of kimberlite-borne crustal xenoliths have been used to elucidate the architecture and thermal evolution of the continental lithosphere of southern Africa. U-Pb ...
Investigations of cloud altering effects of atmospheric aerosols using a new mixed Eulerian-Lagrangian aerosol model
(Massachusetts Institute of Technology, 2004)
Industry, urban development, and other anthropogenic influences have substantially altered the composition and size-distribution of atmospheric aerosol particles over the last century. This, in turn, has altered cloud ...
The use of satellite remote sensing to determine land water runoff
(Massachusetts Institute of Technology, 2001)
The purpose of this study is to estimate land water runoff from satellite measurements of net radiation at the top of the atmosphere by invoking columnar atmospheric water and energy balance. Land water runoff is an important ...
Lunar lander propellant production for a multiple site exploration mission
(Massachusetts Institute of Technology, 2004)
A model has been developed to analyze the benefit of utilizing a processing plant architecture so that a lunar oxygen production demonstration mission can also provide a significant exploration and scientific return. This ...
Submesoscale coherent vortices in the deep Brazil Basin
(Massachusetts Institute of Technology, 2000)
With Lagrangian and hydrographic data taken in the deep Brazil Basin, we identify several submesoscale coherent vortices (SCVs). These features contrast with SCV paradigms in that float data indicate approximately equal ...
Annular modes in multiple migrating zonal jet regime
(Massachusetts Institute of Technology, 2006)
Recent studies have linked hemispheric climate variability to annular modes, zonally symmetric structures that describe the horizontal redistribution of atmospheric mass. The resulting changes in the pressure patterns ...
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 ...
Elastic and viscous anisotropy in Earth's mantle : observations and implications
(Massachusetts Institute of Technology, 2009)
In this thesis I address the topic of anisotropy - the directional dependence of physical properties of rocks - from two complementary angles: I use seismic anisotropy to detect deformation in the mantle, and I demonstrate ...
Effects of lithospheric strength on convection in the Earth's mantle
(Massachusetts Institute of Technology, 2000)
Convection in Earth's mantle is driven largely by horizontal density gradients that form when cold, dense, mantle lithosphere descends into the mantle interior, either through subduction for plate-scale flow, or as localized ...
Models of interseismic deformation with an analytic framework for the inclusion of general linear viscoelastic rheologies
(Massachusetts Institute of Technology, 2006)
I investigate postseismic and interseismic deformation using two-dimensional models of a vertical strike-slip fault in an elastic layer over a viscoelastic region. Central to this, I derive an analytic framework to include ...