Index Catalog // ScholarsArchive@OSU

Biophysical feedback mediates effects of invasive grasses on coastal dune shape

Creator:: Zarnetske, Phoebe L., Hacker, Sally D., Seabloom, Eric W., Ruggiero, Peter, Killian, Jason R., Maddux, Timothy B., and Cox, Daniel
Abstract:: Vegetation at the aquatic–terrestrial interface can alter landscape features through its growth and interactions with sediment and fluids. Even similar species may impart different effects due to variation in their interactions and feedbacks with the environment. Consequently, replacement of one engineering species by another can cause significant change in the...
Resource Type:: Article
Full Text:: ecol-93-05-30 1439..1450 Ecology, 93(6), 2012, pp. 1439–1450

Ocean Mixing by Kelvin-Helmholtz Instability

Creator:: Smyth, William D. and Moum, James N.
Abstract:: Kelvin-Helmholtz (KH) instability, characterized by the distinctive finite-amplitude billows it generates, is an important mechanism in the development of turbulence in the stratified interior of the ocean. In particular, it is often assumed that the onset of turbulence in internal waves begins in this way. Clear recognition of the importance...
Resource Type:: Article
Full Text:: Oceanography | June 2012 141 B y W I l l I a M D . S M y t H a N D J a M e S N . M O u M value

Effect of forecast skill on management of the Oregon coast coho salmon (Oncorhynchus kisutch) fishery

Creator:: Rupp, David E., Wainwright, Thomas C., and Lawson, Peter W.
Abstract:: Better fisheries management is often given as one justification for research on improving forecasts of fish survival. However, the value gained from expected improvements in forecast skill in terms of achieving management goals is rarely quantified as part of research objectives. Using Monte Carlo simulations of population dynamics, we assessed...
Resource Type:: Article
Full Text:: 2012. Published at www.nrcresearchpress.com/cjfas on 18 May 2012. J2011-0368 Paper handled by

Power Calculations for a Passively Tuned Point Absorber Wave Energy Converter on the Oregon Coast

Creator:: Oskamp, Jeffrey A. and Özkan-Haller, H. Tuba
Abstract:: A wave-structure interaction model is implemented, and power output estimates are made for a simplified wave energy converter operating in measured spectral wave conditions. In order to estimate power output from a wave energy converter, device response to hydrodynamic forces is computed using a boundary element method potential flow model....
Resource Type:: Article
Full Text:: submitted to Elsevier February 3, 2012 *Manuscript Click here to view linked References constant after

Adaptive Composite Map Projections

Creator:: Jenny, Bernhard
Abstract:: All major web mapping services use the web Mercator projection. This is a poor choice for maps of the entire globe or areas of the size of continents or larger countries because the Mercator projection shows medium and higher latitudes with extreme areal distortion and provides an erroneous impression of...
Resource Type:: Article
Full Text:: : Jenny, B. (2012). Adaptive composite map projections. IEEE Transactions on Visualization and Computer

Using Relative Humidity as a State Variable in Climate Feedback Analysis

Creator:: Held, Isaac M. and Shell, Karen M.
Abstract:: An approach to climate change feedback analysis is described in which tropospheric relative humidity replaces specific humidity as the state variable that, along with the temperature structure, surface albedos, and clouds, controls the magnitude of the response of global mean surface temperature to a radiative forcing. Despite being simply a...
Resource Type:: Article
Full Text:: , Corvallis, Oregon (Manuscript received 8 December 2011, in final form 6 February 2012) ABSTRACT An

Ensemble-Based Data Assimilation for Estimation of River Depths

Creator:: Wilson, Greg and Özkan-Haller, H. Tuba
Abstract:: A method is presented for estimating bathymetry in a river, based on observations of depth-averaged velocity during steady flow. The estimator minimizes a cost function that combines known information in the form of a prior estimate and measured data (including measurement noise). State augmentation is used to relate the measured...
Resource Type:: Article
Full Text:: Sciences, Oregon State University, Corvallis, Oregon (Manuscript received 20 January 2012, in final form 7

The Unpredictable Nature of Internal Tides on Continental Shelves

Creator:: Nash, Jonathan D., Kelly, Samuel M., Shroyer, Emily L., Moum, James N., and Duda, Timothy F.
Abstract:: Packets of nonlinear internal waves (NLIWs) in a small area of the Mid-Atlantic Bight were 10 times more energetic during a local neap tide than during the preceding spring tide. This counterintuitive result cannot be explained if the waves are generated near the shelf break by the local barotropic tide...
Resource Type:: Article
Full Text:: Hole, Massachusetts (Manuscript received 6 February 2012, in final form 5 June 2012) ABSTRACT

Comparison of Thermal Variance Dissipation Rates from Moored and Profiling Instruments at the Equator

Creator:: Perlin, A. and Moum, J. N.
Abstract:: As a quantitative test of moored mixing measurements using [subscript χ]pods, a comparison experiment was conducted at 0°, 140°W in October–November 2008. The following three measurement elements were involved: (i) NOAA’s Tropical Atmosphere Ocean (TAO) mooring with five [subscript χ]pods, (ii) a similar mooring 9 km away with seven [subscript...
Resource Type:: Article
Full Text:: 31 January 2012, in final form 1 May 2012) ABSTRACT As a quantitative test of moored mixing

Baroclinic Frontal Instabilities and Turbulent Mixing in the Surface Boundary Layer. Part I: Unforced Simulations

Creator:: Skyllingstad, Eric D. and Samelson, R. M.
Abstract:: Interaction between mixed layer baroclinic eddies and small-scale turbulence is studied using a nonhydrostatic large-eddy simulation (LES) model. Free, unforced flow evolution is considered, for a standard initialization consisting of an 80-m-deep mixed layer with a superposed warm filament and two frontal interfaces in geostrophic balance, on a model domain...
Resource Type:: Article
Full Text:: (Manuscript received 19 November 2010, in final form 6 April 2012) ABSTRACT Interaction between mixed layer

ScholarsArchive@OSU

Biophysical feedback mediates effects of invasive grasses on coastal dune shape

Ocean Mixing by Kelvin-Helmholtz Instability

Effect of forecast skill on management of the Oregon coast coho salmon (Oncorhynchus kisutch) fishery

Power Calculations for a Passively Tuned Point Absorber Wave Energy Converter on the Oregon Coast

Adaptive Composite Map Projections

Using Relative Humidity as a State Variable in Climate Feedback Analysis

Ensemble-Based Data Assimilation for Estimation of River Depths

The Unpredictable Nature of Internal Tides on Continental Shelves

Comparison of Thermal Variance Dissipation Rates from Moored and Profiling Instruments at the Equator

Baroclinic Frontal Instabilities and Turbulent Mixing in the Surface Boundary Layer. Part I: Unforced Simulations

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