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Now showing items 21-30 of 42
Wind-driven circulation on a shallow, stratified shelf
(Massachusetts Institute of Technology, 1999)
A detailed examination of the development of a deep convection event observed in the Greenland Sea in 1988-89 is carried out through a combination of modeling, scale estimates, and data analysis. We develop a prognostic ...
Ground penetrating radar characterization of geologic structure beneath the Aberjona wetland
(Massachusetts Institute of Technology, 1999)
Ground penetrating radar (GPR) surveys are performed to determine geologic structure and to assist in the characterization and eventual modeling of ground water flow beneath the Well-H region of the Aberjona River in Woburn, ...
Coupled length scales in eroding landscapes
(Massachusetts Institute of Technology, 1999)
We propose a method to study natural topography by means of local transform. A nonlinear local transform Alc[h(x)] of the elevation field h(x) is used to determine a director field of anisotropy a(x). The director field ...
Numerical simulation of primary petroleum migration
(Massachusetts Institute of Technology, 1999)
A numerical simulation is presented for the generation and movement of petroleum in a single layer of source rock, a process also know as primary migration. The equations governing the system are derived from principles ...
Wobbly winds in an ice age : the mutual interaction between the great continental ice sheets and atmospheric stationary waves
(Massachusetts Institute of Technology, 1999)
The ice sheets of the last glacial maximum (about 21 thousand years ago) covered a significant fraction of the high latitude land mass, reached up to 3km in height, and had length scales of thousands of kilometers. They ...
Calculating the global flux of carbon dioxide into groundwater
(Massachusetts Institute of Technology, 1999)
In this research, the global annual flux of inorganic carbon into groundwater was calculated to be 4.4 GtC/y, with a lower bound of 1.4 GtC/y and an upper bound of 27.5 GtC/y. Starting with 44 soil PCO2 measurements, the ...
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 ...