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Now showing items 31-40 of 42
Feedback mechanism in the oceanic carbon cycle
(Massachusetts Institute of Technology, 1999)
In this thesis, I designed and implemented a simple atmosphere-ocean coupled carbon cycle model which can be used as a tool to uncover the mechanisms of the interaction between the dynamics of the atmosphere-ocean system ...
Terrestrial sources and sinks of atmospheric methyl bromide : three-dimensional modeling of tropospheric abundance and sensitivities
(Massachusetts Institute of Technology, 1999)
Current estimates of methyl bromide surface fluxes are inconsistent with the observed tropospheric mole fractions (9 to 10 ppt, globally averaged) and the calculated atmospheric lifetime (1.7 ± 0.2 years), with mid-range ...
A case study of the formation of an Eastern Pacific tropical cyclone
(Massachusetts Institute of Technology, 1999)
A case study is performed to investigate the nature of tropical cyclogenesis in the eastern Pacific Ocean. Focus is given to the formation and development of the initial circulation which eventually intensified into Hurricane ...
Observational study of the monsoonal dynamics and eddy shedding phenomena
(Massachusetts Institute of Technology, 1999)
We analyze atmospheric data in order to study the upper tropospheric dynamics in the area of the Asian summer monsoon. We look at summers of four years from 1987 to 1990. The divergent upper tropospheric circulation of the ...
A comparison of short-circuited streaming potentials in Westerly granite from changes in the rock's volume, shape, saturation, and fracture under unconfined uniaxial compression
(Massachusetts Institute of Technology, 1999)
An experiment was designed to gain some insight into the phenomena of electrical charge in the uniaxially stressed environment of a sample of Westerly granite. Varying properties of size, shape, saturation, and stress rate ...
Fluid flow in porous media : NMR imaging and numerical simulation
(Massachusetts Institute of Technology, 1999)
We use nuclear magnetic resonance (NMR) imaging to obtain a three-dimensional image of the pore structure in a limestone core, 4.5 mm in diameter and 10 mm in length, with a resolution of 40 [mu]m. This image is converted ...
Compositional structure in the asteroid belt : results of a spectroscopic survey
(Massachusetts Institute of Technology, 1999)
Visible wavelength spectra have been obtained for 1189 main-belt asteroids during the second phase of the Small Main-belt Asteroid Spectroscopic Survey. These telescopic measurements were made using charge-coupled device ...
Permeability prediction in Benin River/Gbokoda field in Nigeria : a case study using facies derived from core studies and multiple regression of wireline data
(Massachusetts Institute of Technology, 1999)
Detailed understanding of the heterogeneities and complexity of reservoir architecture and flow properties are crucial to development and exploitation of commercial hydrocarbon reservoirs. Thus, reservoir characterization ...
Stellar occultation studies of Saturn's upper atmosphere
(Massachusetts Institute of Technology, 1999)
The properties of Saturn's upper atmosphere are not well-known despite several spacecraft flybys. However, the region of 1-100 [mu]bar can be studied in detail by observing stellar occultations -- when the planet passes ...
Injection and movement of Tritium-³He in the Northeastern Atlantic
(Massachusetts Institute of Technology, 1999)
This thesis describes an attempt to build a box model of the circulation in the eastern North Atlantic and to use it with transient tracer data to infere rates of ventilation in the subtropcial thermocline. The starting ...