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.
Results
Showing 1 to 20 of 65 for “"External Forcing"”.
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On the external forcing of Indian Ocean climate variability across timescales
It is imperative to understand the dynamics of external climate forcings and the nature of the climate system’s responses for improved predictability. These forcings include low-probability, high-impact events like explosive volcanic eruptions as well as the continued injection of anthropogenic …
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On the external forcing of Indian Ocean climate variability across timescales
It is imperative to understand the dynamics of external climate forcings and the nature of the climate system’s responses for improved predictability. These forcings include low-probability, high-impact events like explosive volcanic eruptions as well as the continued injection of anthropogenic …
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The path prediction of cyclones with Kalman filters
… matricies R and Q, and the addition of an external forcing function to the filter, effectively compensated for this tracking error. Results for the simulations show significant performance advantages of using an external forcing function in the system.
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Structure-preserving Numerical Methods for Engineering Applications
… algorithms for mechanical systems with external forcing and also extends those methods to systems that evolve on non-Euclidean manifolds. The dissertation is focused on numerical schemes derived from variational principles – schemes that are general enough to apply to a large class of …
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Fingerprints and Drivers of Recent Changes in Oceanic Oxygen: From Regional to Global Scales
… anthropogenic warming. The contribution of external forcing factors to observed changes in dissolved oxygen concentration ([O2]) relative to natural internal variability is examined using statistical methods which synthesise historical measurements and ocean biogeochemistry model output. …
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Impacts of double-diffusive processes on the thermohaline circulation
… on the diapycnal diffusivity. For any given external forcing, there is only one equilibrium state for the thermohaline circulation. (b) Under "flux" boundary conditions, there is a half power law dependence of the meridional overturning rate on the diapycnal diffusivity. Only one mode is …
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Exploration of natural climate variability and changes in future events using observations, proxy data and model simulations
… and cryosphere—in response to two main drivers: externally forced changes, such as those caused by human activities, volcanic eruptions, and the planet’s orbital configuration; and internally generated changes arising from the natural interactions among these Earth systems. Herein I attempt to …
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Glacier-ocean interactions in shallow-silled fjords
… by sill processes, freshwater inputs, and external forcing, are not well understood. This dissertation investigates the impact of these factors on fjord circulation, water properties, and submarine melting using a combination of numerical simulations and observational analysis. ☐ Idealized …
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Impacts of double-diffusive processes on the thermohaline circulation
… on the diapycnal diffusivity. For any given external forcing, there is only one equilibrium state for the thermohaline circulation. (b) Under "flux" boundary conditions, there is a half power law dependence of the meridional overturning rate on the diapycnal diffusivity. Only one mode is …
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Phase Synchronization In Three-dimensional Lattices And Globally Coupled Populations Of Nonidentical Rossler Oscillators
… synchronization in one oscillator with periodic external forcing and in two-coupled nonidentical oscillators was explored at first. The study was further extended to consider three-dimensional lattices and globally coupled populations of nonidentical oscillators, in which the mathematical …
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Controls on terminus change of marine terminating glaciers in Greenland over the last 40+ years
… glacier termini change over time compared to external forcing and internal glacier dynamics, we are able to move toward a better understanding of marine-terminating glaciers. In this dissertation, I use terminus traces to observe how and why marine-terminating glaciers change in order to …
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Development and Initial Testing of a Micro-Newton Torsion Pendulum with Gas-Dynamic Calibration
… electromagnetic interference effects internal or external to the thruster being tested. The design and testing of a gas-dynamic calibration thruster is included. This thruster is fully self-contained on the pendulum arm, with no external wires or feedlines connected to the device and impacting the …
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Marine influence on juvenile fish trophic ecology and community dynamics in Maryland's northern coastal lagoons
… was examined under varied levels of internal and external forcing. In 2009, stable isotope analysis showed increasing marine carbon dependency by bay anchovy with decreasing distance to the marine inlet. Following large seagrass losses, no similar trend was detected in 2012. Weakfish showed no …
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Internal vs. External Forcings in Supercell Interactions and Their Impact on Storm Morphology and Intensity
… often be unobserved by operational radar. The external forcing associated with the initial storm cell pair orientation modulates the frequencies of the internal downbursts that drive the intensification of the low-level mesocyclone.
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The Statistical Theory of Stationary Turbulence
… either two- or three-dimensional, and for which external forcing maintains the state of statistical equilibrium. The solution of this equation, for the range of separation where the contribution from viscous forces is negligible, yields the third-order structure function to all orders in the …
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The mechanics of mechanotransduction : analyses of cell perturbation
… a single cell or cell monolayer produced by forcing one tethered microbead. On the assumption of structural homogeneity, stress and strain patterns were highly localized, suggesting that the effects of magnetocytometry are confined to a region extending less than 10tm from the bead. …
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Transverse Variability of the Flow and Density in Inlets of Southern Chile
… in their transverse dynamics in response to external forcing. In Aysen Fjord (45.2°S) the mean flow showed a three layer structure that was consistent with up-fjord wind-induced exchange, while in Chacao Channel (41.8°S), the mean flow exhibited predominantly a lateral structure that featured …
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Biophysical interactions and stability at salt marsh margins
… salt marsh margin erosion has largely focused on external forcing and margin response at scales much larger than those on which these marsh properties vary, resulting in an underestimation of the potentially important role of internal substrate characteristics. In order to investigate the possible …
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Equilibration of an atmosphere by geostrophic turbulence
… on the response of the atmosphere to changes in external forcing. A similar criterion does, however not hold in the Southern Ocean, a region whose dynamics are otherwise very similar to the mid-latitude atmosphere. This thesis resolves this apparent contradiction, using a combination of …
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