Index Catalog // ScholarsArchive@OSU

Form Drag and Mixing Due to Tidal Flow past a Sharp Point

Creator:: Edwards, Kathleen A., MacCready, Parker, Moum, James N., Pawla, Geno, Klymak, Jody M., and Perlin, Alexander
Abstract:: Barotropic tidal currents flowing over rough topography may be slowed by two bottom boundary–related processes: tangential stress of the bottom boundary layer, which is generally well represented by a quadratic drag law, and normal stress from bottom pressure, known as form drag. Form drag is rarely estimated from oceanic observations...
Resource Type:: Article
Full Text:: phoc_34_411.1297_1312.tp VOLUME 34 JUNE 2004J O U R N A L O F P H Y S I

Dynamics of the Columbia River tidal plume

Creator:: Kilcher, Levi F.
Abstract:: This dissertation investigates the dynamics of the tidally modulated outflow from the Columbia River mouth using high resolution measurements of velocity, density and turbulent microstructure. At high tide, flow through the river mouth reverses from flood (onshore) to ebb (offshore). During ebb, buoyant fluid issues from the river mouth and...
Resource Type:: Dissertation
Full Text:: . . . . . . . . . . . . . . . . . . . . . . 144 3.16 Maximum during each ebb of, 〈Ri−1〉p (a), and 〈τ〉� / 〈c2〉 (b) versus tidal amplitude, ∆η

A Numerical Modeling Study of the Upwelling Source Waters along the Oregon Coast during 2005

Creator:: Rivas, David and Samelson, R. M.
Abstract:: Regional ocean circulation along the Oregon coast is studied numerically for forcing fields derived from year 2005 and climatological-mean conditions. The primary object is to study directly the Lagrangian pathways by which fluid arrives in the Oregon upwelling zone. Roughly half of the upwelling fluid is found to arrive in...
Resource Type:: Article
Full Text:: L O F P H Y S I C A L O C E A N O G R A P H Y VOLUME 41 DOI: 10.1175/2010JPO4327.1 � 2011 American

The Influence of Lateral Advection on the Residual Estuarine Circulation: A Numerical Modeling Study of the Hudson River Estuary

Creator:: Scully, Malcolm E., Geyer, W. Rockwell, and Lerczak, James A.
Abstract:: In most estuarine systems it is assumed that the dominant along-channel momentum balance is between the integrated pressure gradient and bed stress. Scaling the amplitude of the estuarine circulation based on this balance has been shown to have predictive skill. However, a number of authors recently highlighted important nonlinear processes...
Resource Type:: Article
Full Text:: estuaries, including the Hudson River, with skill (Geyer et al. 2000; MacCready 2007; Ralston et al. 2008

Turbulent mixing in a strongly forced salt wedge estuary

Creator:: Ralston, David K., Geyer, W. Rockwell, Lerczak, James A., and Scully, Malcolm
Abstract:: Turbulent mixing of salt is examined in a shallow salt wedge estuary with strong fluvial and tidal forcing. A numerical model of the Merrimack River estuary is used to quantify turbulent stress, shear production, and buoyancy flux. Little mixing occurs during flood tides despite strong velocities because bottom boundary layer...
Resource Type:: Article
Full Text:: during flood tides [Peters, 1999; MacCready and Geyer, 2001; Chant et al., 2007]. Turbulence is generated

Structure and dynamics of the Columbia River tidal plume front

Creator:: Kilcher, Levi F. and Nash, Jonathan D.
Abstract:: Time‐dependent buoyant plumes form at the outflow of tidally dominated estuaries. When estuary discharge velocity exceeds plume internal wave speed c, a sharp front forms at the plume’s leading edge that expands from the time‐dependent source. Using observations of the Columbia River tidal plume from multiple tidal cycles we characterize...
Resource Type:: Article
Full Text:: limit, Benjamin pre- dicted, F = ffiffiffi 2 p . More recently, in a lock‐release framework, Shin et

A Simple Dynamical Model of the Warm-Water Branch of the Middepth Meridional Overturning Cell

Creator:: Samelson, R. M.
Abstract:: A reduced-gravity model is presented of the warm-water branch of the middepth meridional overturning circulation in a rectangular basin with a circumpolar connection. The model describes the balance between production of warm water by Ekman advection across the circumpolar current, dissipation of warm water by eddy fluxes southward across the...
Resource Type:: Article
Full Text:: (Gnanadesikan 1999; Hallberg and Gnanadesikan 2001, 2006; MacCready and Rhines 2001). Here, a simple, closed

Internal Tide Reflection and Turbulent Mixing on the Continental Slope

Creator:: Nash, Jonathan D., Kunze, Eric, Toole, John M., and Schmitt, Ray W.
Abstract:: Observations of turbulence, internal waves, and subinertial flow were made over a steep, corrugated continental slope off Virginia during May–June 1998. At semidiurnal frequencies, a convergence of low-mode, onshore energy flux is approximately balanced by a divergence of high-wavenumber offshore energy flux. This conversion occurs in a region where the...
Resource Type:: Article
Full Text:: generate internal lee waves if f /kbathy , U , N/kbathy (Thorpe 1992; MacCready and Pawlak 2001

Observing biogeochemical cycles at global scales with profiling floats and gliders: Prospects for a global array

Creator:: Johnson, Kenneth S., Berelson, William M., Boss, Emmanuel S., Chase, Zanna, Claustre, Herve, Emerson, Steven R., Gruber, Nicolas, Kortzinger, Arne, Perry, Mary Jane, and Riser, Stephen C.
Abstract:: Chemical and biological sensor technologies have advanced rapidly in the past five years. Sensors that require low power and operate for multiple years are now available for oxygen, nitrate, and a variety of bio-optional properties that serve as proxies for important components of the carbon cycle (e.g., particulate organic carbon)....
Resource Type:: Article
Full Text:: Geophysical Research 113, C04020, doi:10.1029/2007JC004347. MacCready, P., and P. Quay. 2001. Biological

Development of satellite bloom detection products for coastal Oregon

Creator:: McKibben, S. Morgaine
Abstract:: Two bloom-detection products were developed for the Oregon coast that describe the relative percent change observed between successive pairs of 8-day chlorophyll-a (CHL) and fluorescence line-height (FLH) products obtained from the MODerate Resolution Imaging Spectroradiometer aboard the Aqua spacecraft (MODIS-Aqua). The CHL[subscript dev] and FLH[subscript dev] products, respectively, were optimized...
Resource Type:: Masters Thesis

The role of turbulence stress divergence in decelerating a river plume

Creator:: Kilcher, Levi F., Nash, Jonathan D., and Moum, James N.
Abstract:: Turbulence controls the composition of river plumes through mixing and alters the plume's trajectory by diffusing its momentum. While believed to play a crucial role in decelerating river-source waters, the turbulence stress in a near-field river plume has not previously been observationally quantified. In this study, finely resolved density, velocity,...
Resource Type:: Article
Full Text:: - ges: (1) 〈〉 denotes an average between �9 < x < �5 km; (2) 〈〉p denotes an average within the plume

Inner-shelf circulation off the central Oregon Coast

Creator:: Kirincich, Anthony R.
Abstract:: Inner-shelf circulation and mechanisms of across-shelf transport of water masses were examined using seven years of observations collected by the Partnership for Interdisciplinary Studies of Coastal Oceans (PISCO) program, a long-term monitoring effort along the central Oregon coast. Since 1998, moored velocity and hydrographic measurements have been obtained during the...
Resource Type:: Dissertation
Full Text:: relative importance of stratification and bottom slope (MacCready and Rhines, 1993; Austin and Lentz, 2002

ScholarsArchive@OSU

Form Drag and Mixing Due to Tidal Flow past a Sharp Point

Dynamics of the Columbia River tidal plume

A Numerical Modeling Study of the Upwelling Source Waters along the Oregon Coast during 2005

The Influence of Lateral Advection on the Residual Estuarine Circulation: A Numerical Modeling Study of the Hudson River Estuary

Turbulent mixing in a strongly forced salt wedge estuary

Structure and dynamics of the Columbia River tidal plume front

A Simple Dynamical Model of the Warm-Water Branch of the Middepth Meridional Overturning Cell

Internal Tide Reflection and Turbulent Mixing on the Continental Slope

Observing biogeochemical cycles at global scales with profiling floats and gliders: Prospects for a global array

Development of satellite bloom detection products for coastal Oregon

The role of turbulence stress divergence in decelerating a river plume

Inner-shelf circulation off the central Oregon Coast

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