Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"earth systems"”.
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Magnetic properties of the rare earth systems neodymium/yttrium and dysprosium/yttrium
… magnetization techniques. These epitaxial Nd/Y systems are the first to be grown and studied which incorporate a light rare earth (RE) element. Using neutron diffraction, we have found that a portion of the Nd moment in the superlattices orders in a c-axis helical phase that does not exist in …
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Wetland model in an earth systems modeling framework for regional environmental policy analysis
… land fluxes component of the Integrated Global Systems Model (IGSM), a framework that simulates the relationship of physical systems to climate variations. Wetlands play an important role in the storage and regulation of the global water budget so including them in a land water cycle model is …
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We Humans: Nature, Culture, and Identity in the Anthropocene Age
… hydrology, atmosphere, and climate of planet Earth. Crutzen proposed the inauguration of a new geological epoch termed the “Anthropocene,” which denoted the human domination of the biosphere. Since then, a number of geologists and Earth systems scientists have joined Crutzen in calling for a …
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We Humans: Nature, Culture, and Identity in the Anthropocene Age
… hydrology, atmosphere, and climate of planet Earth. Crutzen proposed the inauguration of a new geological epoch termed the “Anthropocene,” which denoted the human domination of the biosphere. Since then, a number of geologists and Earth systems scientists have joined Crutzen in calling for a …
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Paleoenvironment and paleoclimate of NE Pangea in early Permian-linking chemo- and cyclo-stratigraphy, Bogda Mountains, NW China
… to understand physical and chemical responses of Earth Systems to environmental and climatic perturbations of diverse magnitudes and time scales in Bogda Mountains, NE Pangea. Field investigations, petrographic observations, and geochemical analyses have been used to interpret paleoenvironment and …
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Mission Planning and Instrument Design for Stellar Occultation Measurements of Lower Thermospheric Nitric Oxide in the Polar Night
… will allow the investigation of how the Sun and Earth systems are related via energetic particle precipitation in the auroral regions. The work performed in this thesis supports the instrument design and requirements development by modelling the stellar occultation geometry to identify orbit …
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IMPLEMENTATION OF A VERTICALLY INTEGRATED ICE SHEET MOMENTUM BALANCE MODEL
… is presented. As a component of the Community Earth Systems Model the newly developed momentum balance will directly benefit from ice/ocean and ice/atmosphere coupling efforts occurring elsewhere. The objectives of this thesis are to develop a model which converges quickly (quadratic …
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IMPLEMENTATION OF A VERTICALLY INTEGRATED ICE SHEET MOMENTUM BALANCE MODEL
… is presented. As a component of the Community Earth Systems Model the newly developed momentum balance will directly benefit from ice/ocean and ice/atmosphere coupling efforts occurring elsewhere. The objectives of this thesis are to develop a model which converges quickly (quadratic …
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Integrating high-precision U-Pb geochronologic data with dynamic models of earth processes
… works to address a variety of problems in the Earth sciences. In each study, the interpretation of geochronologic data is aided with a numerical model that simulates the long-term behavior and/or initial conditions of the U-Pb system and provides an effective means of exploring the parameters …
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Multi-Modal Data Fusion, Image Segmentation, and Object Identification using Unsupervised Machine Learning: Conception, Validation, Applications, and a Basis for Multi-Modal Object Detection and Tracking
… aiming to study the complexities of the various Earth systems, it can also present a large number of new challenges. With this information in mind, our group has set our aims on combining datasets with different spatial and spectral resolutions in an effective and as-general-as-possible way, with …
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Questions and clarity: insights from applying computational methods to paleoclimate archives
It is a scientifically accepted fact that the Earth’s climate is presently undergoing significant changes with the potential for immense negative impacts on human society. As evidence of these impacts become clear and common, it becomes ever more important to constrain the nature, magnitude, and …
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Exploration of natural climate variability and changes in future events using observations, proxy data and model simulations
… the connection and interplay between changes in Earth's climate—comprising the physical interactions and states of the atmosphere,biosphere, hydrosphere, and cryosphere—in response to two main drivers: externally forced changes, such as those caused by human activities, volcanic eruptions, and …
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Questions and Clarity: Insights from Applying Computational Methods to Paleoclimate Archives
It is a scientifically accepted fact that the Earth’s climate is presently undergoing significant changes with the potential for immense negative impacts on human society. As evidence of these impacts become clear and common, it becomes ever more important to constrain the nature, magnitude, and …
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Exploration and Production Risk Mitigation for Geothermal Adoption in the Energy Transition
… back nearly a century for natural hydrothermal systems. More recently, enhanced geothermal systems (EGS) promise a broader reach with engineered solutions for extracting subsurface heat from a wider variety of locations. The potential synergy between the oil & gas and geothermal offers an …
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Capturing dynamics of marine inorganic carbon fluxes from diurnal to decadal timescales
… cycle plays an important role in regulating Earth’s climate. The vastness of the open ocean and the large variability in the coastal ocean provide obstacles to accurately quantify storage and transport of inorganic carbon within marine ecosystems and between marine and other earth systems. …
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Stratigraphic response to Cordilleran processes along the south central Andean margin
… plate margins are fundamental components of Earth systems that link mountain building, magmatism, lithospheric dynamics, surface processes, and climate-carbon cycles. Resolving the feedbacks and relationships among these components has been a longstanding challenge in Earth science with broad …
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Capturing dynamics of inorganic carbon fluxes from diurnal to decadal timescales
… cycle plays an important role in regulating Earth's climate. The vastness of the open ocean and the large variability in the coastal ocean provide obstacles to accurately quantify storage and transport of inorganic carbon within marine ecosystems and between marine and other earth systems. …
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Deep-marine depositional systems of the western North Atlantic: Insights into climate and passive-margin evolution
… pertaining to the history and evolution of Earth. Whereas the specific processes reflected by the stratigraphic record differ with respect to a given depositional environment, deposits in deep-marine settings, particularly passive margins, provide a unique, long-term record of paleoclimate, …
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Sedimentary texture similarities in deep-marine channel sandstones: Insights from petrographic characterization of Cretaceous Tres Pasos Formation, Chile
… about past climates and other perturbations to Earth systems; the transfer of nutrients, pollutants, and organic carbon; and can be important subsurface reservoirs (hydrocarbon, groundwater, etc.). However, studying the processes associated with deep-marine channels is challenging and difficult …
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Remote Sensing Big Data and Physical Models for Resilience to Geohazards in the Water-Energy Nexus
… and anthropogenic factors rapidly transforms Earth's geophysical systems, posing significant risks to critical infrastructure, ecosystems, and communities. My dissertation tackles two central challenges in geosciences: the climate-driven alterations in geosystems within the water-energy nexus …
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