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Filtering by: Creator Bennett, D. D. Remove constraint Creator: Bennett, D. D. Academic Affiliation College of Oceanic and Atmospheric Sciences Remove constraint Academic Affiliation: College of Oceanic and Atmospheric Sciences

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  • The Inverse Ocean Modeling System. Part I: Implementation

    Creator:
    Bennett, A. F., Chua, B. S., Pflaum, B. L., Erwig, M., Fu, Z., Loft, R. D., and Muccino, J. C.
    Abstract:
    The Inverse Ocean Modeling (IOM) system constructs and runs weak-constraint, four-dimensional variational data assimilation (W4DVAR) for any dynamical model and any observing array. The dynamics and the observing algorithms may be nonlinear but must be functionally smooth. The user need only provide the model and the observing algorithms, together with...
    Resource Type:
    Article
    Full Text:
    -mail: bennett@coas.oregonstate.edu 1608 J O U R N A L O F A T M O S P H E R I C A N D O C E A N I C T

  • Semi-diurnal and diurnal tidal dissipation from TOPEX/Poseidon altimetry

    Creator:
    Egbert, Gary D. and Ray, Richard D.
    Abstract:
    Tidal energy dissipation is estimated for eight semi‐diurnal and diurnal constituents using a global inverse solution constrained by TOPEX/Poseidon altimeter data. Very similar spatial patterns are obtained for all semi‐diurnal constituents, with about one third of the total dissipation occurring in the deep ocean over rough topography. Maps for diurnal...
    Resource Type:
    Article
    Full Text:
    . Atmos. Ocean. Tech., 19, 183–204, 2002. Egbert, G. D., A. F. Bennett, and M. G. G. Foreman, Topex

  • Estimating Open-Ocean Barotropic Tidal Dissipation: The Hawaiian Ridge

    Creator:
    Zaron, Edward D. and Egbert, Gary D.
    Abstract:
    The generalized inverse of a regional model is used to estimate barotropic tidal dissipation along the Hawaiian Ridge. The model, based on the linear shallow-water equations, incorporates parameterizations for the dissipation of energy via friction in the bottom boundary layer and form drag due to internal waves generated at topographic...
    Resource Type:
    Article
    Full Text:
    Ridge EDWARD D. ZARON AND GARY D. EGBERT College of Oceanic and Atmospheric Sciences, Oregon State

  • Are salmon-derived nutrients being incorporated in food webs of invaded streams? Evidence from southern Chile

    Creator:
    Arismendi, I. and Soto, D.
    Abstract:
    Using stable isotope analyses of N and C we present preliminary evidence of marine-derived nutrients from introduced Chinook salmon (Oncorhynchus tshawytscha Walbaum) in stream food webs of Laguna Los Patos, NW Patagonia. Similar to values reported within Chinook salmon's native distributional range periphyton and aquatic insects are the trophic levels...
    Resource Type:
    Article
    Full Text:
    )*, and D. Soto(2) Received January 4, 2012 Revised March 6, 2012 Accepted March 6, 2012 ABSTRACT

  • Heat fluxes over weak SST heterogeneity

    Creator:
    Mahrt, L. and Khelif, D.
    Abstract:
    The spatial variability of turbulence and surface heat flux are examined for the case of small air-surface temperature difference and modest sea-surface temperature variability. As a result of nonlinearities in the bulk formula, the heterogeneity is predicted to shift the area-averaged heat flux toward more significant upward values compared to...
    Resource Type:
    Article
    Full Text:
    for Full Article Heat fluxes over weak SST heterogeneity L. Mahrt1 and D. Khelif2 Received 4

  • A Modification of the Garrett–Munk Internal Wave Spectrum

    Creator:
    Levine, Murray D.
    Abstract:
    The Garrett–Munk (GM) spectrum continues to be a useful description of the oceanic internal wave field. However, there are several inconsistencies and ambiguities that make it difficult to use in comparing internal wave fields at different latitudes, stratifications, and water depths. A modified spectral formulation is presented that treats three...
    Resource Type:
    Article
    Full Text:
    –Munk Internal Wave Spectrum MURRAY D. LEVINE College of Oceanic and Atmospheric Sciences, Oregon

  • Moisture fluxes over snow with and without protruding vegetation

    Creator:
    Mahrt, Larry and Vickers, D.
    Abstract:
    The sublimation of snow and evaporation of melted snow is contrasted between brush, grass and bare ground sites using eddy-correlation data. Averaged over the entire winter season, the evaporation/sublimation is about 20% greater over the brush site than the bare ground site, apparently due to greater supply of snow. Blowing...
    Resource Type:
    Article
    Full Text:
    with and without protruding vegetation By L. MAHRT∗ and D. VICKERS Oregon State University, Corvallis

  • Tracer transport in the Martian atmosphere as simulated by a Mars GCM

    Creator:
    Walsh, Thomas D.
    Abstract:
    This paper investigates the atmospheric circulation and transport characteristics of the Martian atmosphere (as modeled by a Mars GCM) for three sets of conditions. The conditions are based on a combination of season and dust loading (as parameterized by the optical depth, τ). The first experiment is for the Northern...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Thomas D. Walsh for the degree of

  • A complex signal to noise problem : determining the aerosol indirect effect from observations of ship tracks in AVHRR data

    Creator:
    Walsh, Christopher D.
    Abstract:
    Cloud reflectivity is a function of cloud liquid water content and droplet number concentration. Since cloud droplets form around pre-existing aerosol particles, cloud droplet number concentration depends on the availability of particles that can serve as cloud condensation nuclei. Given constant liquid water amount, increased availability of cloud condensation nuclei...
    Resource Type:
    Masters Thesis
    Full Text:
    AN ABSTRACT OF THE THESIS OF Christopher D. Walsh for the

  • 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:
    AN ABSTRACT OF THE THESIS OF Edward D. Zaron for the degree of