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Now showing items 11-20 of 42
Effects of the chaotic behavior of a superposition of waves in the flux across a channel
(Massachusetts Institute of Technology, 1999)
Several numerical experiments were carried out to study the effects of chaotic behavior on the net tracer flux across a channel. The flow is given by a superposition of two propagating waves. The domain was set up so that ...
Variable grid finite-difference modeling including surface topography
(Massachusetts Institute of Technology, 1999)
We have developed a two-dimensional viscoelastic finite-difference modeling method for highly complex surface topography and subsurface structures. Realistic modeling of seismic wave propagation in the near surface region ...
Western South Atlantic holocene and glacial deepwater hydrography derived from benthic foraminiferal Cd/Ca and stable carbon isotope data
(Massachusetts Institute of Technology, 1999)
Today, deep waters produced in the North Atlantic are exported through the western South Atlantic. Antarctic intermediate water (AAIW) also enters the Atlantic in this region. Circumpolar deep water (CDW) fills the depths ...
In-situ permeability estimation : a comparison between acoustic and NMR logs
(Massachusetts Institute of Technology, 1999)
The estimation of formation permeability from full waveform acoustic and nuclear magnetic resonance (NMR) logs in petroleum well logging has improved significantly in recent years. In this thesis, we review the methods of ...
Diagnosis of physical and biological controls on phytoplankton distribution in the Gulf of Maine-Georges Bank region
(Massachusetts Institute of Technology, 1999)
The linkage between physics and biology is studied by applying a one-dimensional model and a two-dimensional model to the Sargasso Sea and the Gulf of Maine- Georges Bank region, respectively. The first model investigates ...
The thermal and metamorphic evolution of mountain belts as a response to erosion, accretion, and radiogenic heating
(Massachusetts Institute of Technology, 1999)
Simple thermal models of collisional orogenesis generally predict metamorphic temperatures that are much cooler than those revealed by thermo barometric studies of real metamorphic terrains. This thesis focuses on a more ...
Laboratory analysis of restrenghtening on simulated faults
(Massachusetts Institute of Technology, 1999)
Seismic data show that stress drop increases with the logarithm of earthquake recurrence interval (1-5 MPa per decade time). If stress drop is taken as a proxy for fault strength, then the data suggest that faults restrengthen ...
GPS kinematic positioning for the airborne laser altimetry at Long Valley, California
(Massachusetts Institute of Technology, 1999)
The object of this thesis is to develop a reliable algorithm and software for em-level kinematic GPS (Global Positioning System) data analysis. To assess the accuracy of the software, we use it to determine the trajectory ...
Analysis and interpretation of clustered microseismicity at geothermal and petroleum reservoirs
(Massachusetts Institute of Technology, 1999)
This thesis presents the analysis and interpretation of four microearthquake clusters near geothermal and petroleum reservoirs. One cluster was induced during a controlled hydraulic fracture experiment conducted by Atlantic ...
Surface and bottom boundary layer dynamics on a shallow submarine bank : southern flank of Georges Bank
(Massachusetts Institute of Technology, 1999)
The thesis investigates the circulation at a 76-m deep study site on the southern flank of Georges Bank, a shallow submarine bank located between the deeper Gulf of Maine and the continental slope. Emphasis is placed on ...