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  • Wave-by-wave Forecasting of Sea Surface Elevation for WEC Applications Utilizing NARX Neural Networks

    Creator:
    Gillespie, Alice
    Abstract:
    Forecasting of ocean waves over a short duration on the order of tens of seconds was approached with the optimization of wave energy conversion in mind. This study outlines the development of an artificial neural network model, specifically the Nonlinear Autoregressive Network with Exogenous Input (NARX), to predict a wave-by-wave...
    Resource Type:
    Masters Thesis
    Full Text:
    forecasting model utilizing artificial neural networks (ANN) that can be applied in real-time for ocean

  • Unstable jet flow along zonal ridge topography

    Creator:
    Witter, Donna Lynn
    Abstract:
    Motivated by observations of locally enhanced sea level variability near steep topographic slopes in regions of strong time-mean flows, effects of zonal ridge topography on zonal oceanic jet flow are investigated. Unstable wave properties and the dynamics of eddy-mean flow interaction are evaluated as a function of topographic geometry using...
    Resource Type:
    Dissertation

  • Tsunami-induced Soil Instability

    Creator:
    Fischer, Rachael Marie
    Abstract:
    Recent tsunami field surveys from the 2011 Great East Japan Earthquake and Tsunami have recorded numerous examples of tsunami-induced soil instability: significant scour around foundations, foundation failure of piles, and other damage caused by liquefaction. From the observations of soil instability leading to the failure of critical coastal structures, it...
    Resource Type:
    Masters Thesis
    Full Text:
    ocean on Earth (Hammack & Segur, 1978). Despite the deficiencies of the solitary wave model, it does

  • Toward wave energy in Oregon : predicting wave conditions and extracted power

    Creator:
    Oskamp, Jeffrey A.
    Abstract:
    Knowledge of wave conditions in nearshore regions supports the development of ocean wave energy technology by providing wave climatology for device design considerations, and power output estimates. By modeling wave transformation over the continental shelf, wave conditions were predicted in nearshore regions where potential wave energy conversion sites are located....
    Resource Type:
    Masters Thesis
    Full Text:
    - structure interaction model was implemented, and power output estimates were made for a simplified wave

  • The time-averaged circulation of the north Pacific Ocean : an analysis based on inverse methods

    Creator:
    Zaron, Edward D.
    Abstract:
    The time-averaged velocity field in the North Pacific was estimated in two sets of inverse calculations. The planetary geostrophic equations were the basis for dynamical models of the flow in each case. The inverse estimates of the circulation were obtained by minimizing a positive-definite cost function, which measured the inconsistency...
    Resource Type:
    Dissertation
    Full Text:
    with "testing" an ocean model; in practice, this involves comparing the prediction from such a model

  • The reflection, transmission and scattering of internal waves at ocean fronts

    Creator:
    Stabeno, Phyllis Jean
    Resource Type:
    Dissertation
    Full Text:
    limited to those fronts which do not intersect the surface or bottom of the ocean. The model used here

  • The effects of harvesting Pacific hake (Merluccius productus) on the offshore community : the results of a multi-species model

    Creator:
    Gartz, Russell G.
    Abstract:
    The effects of harvesting Pacific hake (Merluccius productus) were examined with a multi-species numerical model composed of seven logistic growth equations coupled by a food web. The food web was composed of: California sea lions (Zalophus californianus), hake, sablefish (Anaplopoma fimbria), spiny dogfish (Squalus acanthias), a generic rockfish species (Sebastes...
    Resource Type:
    Masters Thesis
    Full Text:
    sea lions, a mathematical model could be used. Such a model must be complex enough to reveal indirect

  • The effects of clouds on transient baroclinic eddies in a Mars General Circulation Model

    Creator:
    Rucker, Michael S.
    Abstract:
    The low-level baroclinic eddy activity seen in the NASA Ames Mars General Circulation Model (MGCM) for simulations under three annual dust cycles are characterized. Simulations were conducted with both radiatively active and radiatively inert clouds (RAC and non-RAC, respectively) for 11 continuous annual cycles for each dust case. Model results...
    Resource Type:
    Masters Thesis
    Full Text:
    atmosphere and the seasonal ice caps is realistic. 15 FIGURE 2.5: Post albedo nudging model calibration

  • The analysis of directional wave spectra from current and pressure measurements

    Creator:
    Lin, Li-hwa
    Abstract:
    Directional wave spectra have been estimated in this study based upon simultaneous subsurface measurements of current and pressure. Two previously developed methods, the stochastic and deterministic approaches, have been reviewed and restudied. It is demonstrated by means of the Correlation Theorem that the stochastic and deterministic approaches are, under certain...
    Resource Type:
    Masters Thesis
    Full Text:
    and pressure measurements AN ABSTRACT OF THE THESIS OF Li-Hwa Lin for the degree of Master of Ocean

  • Surface wind modification near mid-latitude ocean fronts : observational and dynamical analysis

    Creator:
    O'Neill, Larry W.
    Abstract:
    Interactions between surface winds and meanders in mid-latitude sea surface temperature (SST) fronts with horizontal length scales of 100-1000 km are investigated from satellite observations and numerical simulations. Observations from the Sea- Winds scatterometer on the QuikSCAT satellite show that the magnitude, direction, curl, and divergence of the surface wind...
    Resource Type:
    Dissertation
    Full Text:
    . . . . . . . . 74 3.6 Spatial and temporal variability of the ocean-atmosphere coupling . . 75 3.7 Spatial lags in