Browsing Theses - Earth, Atmospheric and Planetary Sciences by Issue Date
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Browsing Theses - Earth, Atmospheric and Planetary Sciences by Issue Date
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(Massachusetts Institute of Technology, 2014)Recent work has documented dramatic changes in the West Antarctic Ice Sheet (WAIS) over the past 30 years (e.g., mass loss, glacier acceleration, surface warming) due largely to the influence of the marine environment. ...
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(Massachusetts Institute of Technology, 2014)Here I use a simple numerical model of reef profile evolution to show that the present-day morphology of carbonate islands has developed largely in response to late Pleistocene sea level oscillations in addition to variable ...
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(Massachusetts Institute of Technology, 2014)Methylation of mercury (Hg) in the marine water column has been hypothesized to serve as the primary source of the bioaccumulating chemical species monomethylmercury (MMHg) to marine food webs. Despite decades of research ...
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(Massachusetts Institute of Technology, 2014)The aim of seismic tomography is to determine a model of Earth properties that best explain observed seismic data. In practice, the limitations placed on our observations and computational capabilities force us to make a ...
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(Massachusetts Institute of Technology, 2014)The mechanisms of magma ascent and emplacement inferred from study of intrusive complexes have long been the subject of intense debate. Current models favor incremental construction, but much of this work has been focused ...
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(Massachusetts Institute of Technology, 2014)Observations suggest that during the last deglaciation (roughly 20,000-10,000 years ago) the Earth warmed substantially, global sea level rose approximately 100 meters in response to melting ice sheets and glaciers, and ...
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(Massachusetts Institute of Technology, 2014)Paleomagnetic investigations of extraterrestrial samples provide an avenue to test for the presence of ancient core dynamos on planetary bodies. If a core dynamo was indeed present, determining the lifetime of the magnetic ...
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(Massachusetts Institute of Technology, 2014)Marine particles include all living and non-living solid components of seawater, representing an extremely dynamic and chemically diverse mixture of phases. The distributions of these phases are poorly constrained and ...
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(Massachusetts Institute of Technology, 2014)At the land-ocean interface, terrestrial groundwater interacts with seawater to form a subterranean estuary, which can play host to dynamic biogeochemical cycling of nutrients, trace metals and radionuclides. This chemically ...
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(Massachusetts Institute of Technology, 2014)Gravity and topography data provide a powerful tool for studying the interiors of rocky planetary bodies. In this thesis I study three such bodies - Venus, Mercury and the Moon - and I use the gravity and topography data ...
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(Massachusetts Institute of Technology, 2014)The primary objective of this thesis is to improve our understanding of the crustal structure and deformation in the southeastern Tibetan Plateau and adjacent regions using surface wave tomography. Green's functions for ...
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(Massachusetts Institute of Technology, 2014)In this thesis we further develop concepts in inverse scattering, which enable higher resolution imaging with data from dense networks and arrays. We apply the new methods to studies of the crust beneath south Tibet and ...
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(Massachusetts Institute of Technology, 2013)The endeavor to characterize terrestrial exoplanets warrants the study of chemistry in their atmospheres. Here I present a comprehensive one-dimensional photochemistry-thermochemistry model developed from the ground up for ...
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(Massachusetts Institute of Technology, 2013)The stable isotopes, [delta]¹⁵N and [delta]¹⁸O, of nitrite and nitrate can be powerful tools used to interpret nitrogen cycling in the ocean. They are particularly useful in regions of the ocean where there are multiple ...
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(Massachusetts Institute of Technology, 2013)In this thesis two separate projects are investigated, a stellar occultation by 2060 Chiron and rotationally resolved spectra of 1 Ceres. On 29 November 2011 UT, 2060 Chiron occulted a 14-mag star; data were successfully ...
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(Massachusetts Institute of Technology, 2013)Theoretical calculations indicate that topographic stresses in some landscapes may be large enough to fracture rocks, which in turn could influence slope stability, erosion rates, and bedrock hydrologic properties. These ...
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(Massachusetts Institute of Technology, 2013)InSAR has been developed to estimate the temporal change on the surface of Earth by combining multiple SAR images acquired over the same area at different times. In the last two decades, in addition to conventional InSAR, ...
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(Massachusetts Institute of Technology, 2013)A major question for climate studies is to quantify the role of turbulent eddy fluxes in maintaining the observed atmospheric mean state. It has been argued that eddy fluxes keep the mid-latitude atmosphere in a state that ...
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(Massachusetts Institute of Technology, 2013)The Cianten Caldera in Indonesia is immediately adjacent to the producing portion of the Awibengkok geothermal field. The Cianten Caldera contains rocks similar to those in the Awibengkok field, however, the Cianten Caldera ...
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(Massachusetts Institute of Technology, 2013)Efforts to monitor the ocean for signs of climate change are hampered by ever-present noise, in the form of stochastic ocean variability, and detailed knowledge of the character of this noise is necessary for estimating ...
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