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  • Kinematics and Dynamics of a Model Eastern-boundary Poleward Undercurrent

    Creator:
    Duran, Rodrigo
    Abstract:
    A carefully calibrated primitive-equation model from 41°N to 48°N is used to study the poleward undercurrent off the US west coast. Chapter 2 describes poleward flow over the slope from Eulerian and Lagrangian perspectives. The model is robust, in the sense of several characteristics being qualitatively consistent with observational and...
    Resource Type:
    Dissertation
    Full Text:
    approved: Roger M. Samelson A carefully calibrated primitive-equation model from 41ıN to 48ıN is used to

  • Quantifying linear disturbance growth in periodic and aperiodic systems

    Creator:
    Wolfe, Christopher Lee
    Abstract:
    The mathematical and physical connections between three different ways of quantifying linear predictability in geophysical fluid systems are studied in a series of analytical and numerical models. Normal modes, as they are traditionally formulated in the instabilities theories of geophysical fluid dynamics, characterize the asymptotic development of disturbances to stationary...
    Resource Type:
    Dissertation
    Full Text:
    Disturbance Growth in Periodic and Aperiodic Systems Abstract approved: Roger M. Samelson The mathematical

  • Mathematical approaches to the physics of mesoscale oceanography

    Creator:
    Early, Jeffrey J.
    Abstract:
    The long-term evolution of Gaussian eddies is studied in an equivalent barotropic model using both linear and nonlinear quasi-geostrophic theory in an attempt to understand westward propagating satellite altimetry tracked mesoscale eddies. By examining both individual eddies and a large basin seeded with eddies, it is shown that long term...
    Resource Type:
    Dissertation
    Full Text:
    Approaches to the Physics of Mesoscale Oceanography Abstract approved: Roger M. Samelson The long-term

  • Linear theory of roll instabilities in the ocean surface layer

    Creator:
    Duncombe, Jenessa R.
    Abstract:
    This thesis describes the results of a linear stability analysis conducted on a simulated wind-forced ocean front. The ocean surface boundary layer regulates exchanges between the ocean and atmosphere, and the presence of turbulence in the surface layer can greatly impact climate and ocean life. Past research has shown that...
    Resource Type:
    Masters Thesis
    Full Text:
    : _____________________________________________________________________ Roger M. Samelson Eric D. Skyllingstad ABSTRACT This thesis describes the results

  • Field validation of a nearshore circulation model for alongshore-nonuniform flows

    Creator:
    Wilson, Gregory W.
    Abstract:
    We investigate, theoretically and experimentally, the problem of modeling depth-integrated (2DH) surf zone circulation on an alongshore-nonuniform natural beach, with waves approaching from an arbitrary angle. An approximate theoretical model is developed, which captures the important effect of advection in the alongshore dynamics, and shows that a nondimensional parameter Re[subscript]s...
    Resource Type:
    Masters Thesis
    Full Text:
    0.25 0.5 0.75 v 1 ,a m p/ (g h b )1 /2 κ H b /sγ Fig. 2.1: Perturbed flow amplitude v1,amp from

  • The effects of thermodynamic parameterizations, ice shelf geometry, and tides on modeled basal melting of Weddell Sea ice shelves

    Creator:
    Mueller, Rachael D.
    Abstract:
    Antarctic Ice Sheet mass balance and, hence, sea level change is affected by the floating extensions of outlet glaciers and ice streams that take up about 44% of the coastline (Drewry et al., 1982) and are referred to as "ice shelves". Ice sheet mass loss accelerates when these ice shelves...
    Resource Type:
    Dissertation
    Full Text:
    , Roger Samelson, and Peter Ruggiero. Thank you, Eric, for your willingness to assume the role of my

  • 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:
    , Eric Maloney, and Roger Samelson for their enthusiastic guidance and help. To my wonderful close

  • Vertical Coastal Trapped Wave Propagation Produced by a Subsurface Ridge

    Creator:
    Dhage, Laxmikant
    Abstract:
    The vertical propagation of Coastal Trapped Waves (CTWs) due to subsurface ridges is explored with the help of linear numerical and analytical models. Results show that submerged ridges projecting from the shoreline can scatter a horizontally propagating single baroclinic mode Kelvin wave into both upward and downward propagating Kelvin wave...
    Resource Type:
    Dissertation
    Full Text:
    guidance even at the personal level. I would also like to thank the other members of my committee Roger and

  • Satellite observations of the influence of mesoscale ocean eddies on near-surface temperature, phytoplankton and surface stress

    Creator:
    Gaube, Peter
    Abstract:
    The influence of mesoscale ocean eddies on near-surface ocean temperature, surface stress and phytoplankton communities is investigated by collocating numerous satellite measurements along with vertical profiles of oceanic temperature and salinity to the interiors of eddies identified and tracked in altimetric sea surface height maps. The surface currents associated with...
    Resource Type:
    Dissertation
    Full Text:
    , Ricardo Matano, Roger Samel- son and Allen Milligan deserve much credit for developing some of the

  • Atmospheric boundary layer coupling to midlatitude mesoscale sea surface temperature anomalies

    Creator:
    Thum, Nicolai
    Abstract:
    This thesis examines the mechanisms that couple the monthly-averaged atmospheric boundary layer (ABL) to open-ocean sea surface temperature (SST) perturbations on scales of 50-500 km. The observed positive correlation between surface wind speed anomalies and SST anomalies is successfully simulated using the Weather Research and Forecasting (WRF) model. In numerical...
    Resource Type:
    Dissertation
    Full Text:
    m/s have been masked. SST contours are shown as overlays with contour interval of .5◦C. Positive