Index Catalog // ScholarsArchive@OSU

Evaluation of a coastal ocean circulation model for the Columbia River plume in summer 2004

Creator:: Liu, Yonggang, MacCready, Parker, Hickey, Barbara M., Dever, Edward P., Kosro, P. Michael, 1951-, and Banas, Neil S.
Abstract:: Realistic hindcast of the Columbia River estuarine-plume-shelf circulation in summer 2004 using the Regional Ocean Modeling System nested within the Navy Coastal Ocean Model (NCOM) is quantitatively evaluated with an extensive set of observations. The model has about equal skill at tidal and subtidal properties. Tidal circulation and water properties...
Resource Type:: Article
Full Text:: . Citation: Liu, Y., P. MacCready, B. M. Hickey, E. P. Dever, P. M. Kosro, and N. S. Banas (2009), Evaluation

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

On the Upwelling of Downwelling Currents

Creator:: Matano, Ricardo P. and Palma, Elbio D.
Abstract:: The term “downwelling currents” refers to currents with a downslope mass flux in the bottom boundary layer. Examples are the Malvinas and Southland Currents in the Southern Hemisphere and the Oyashio in the Northern Hemisphere. Although many of these currents generate the same type of highly productive ecosystems that is...
Resource Type:: Article
Full Text:: On the Upwelling of Downwelling Currents RICARDO P. MATANO

Three interacting freshwater plumes in the northern California Current System

Creator:: Hickey, B., McGabe, R., Geier, S., Dever, Edward P., and Kachel, N.
Abstract:: The northern California Current System is impacted by two primary freshwater sources: the Strait of Juan de Fuca and the Columbia River. The Columbia is frequently bidirectional in summer, with branches both north and south of the river mouth simultaneously. We describe the interaction of these two warm Columbia plumes...
Resource Type:: Article
Full Text:: complex strait region [MacCready et al., 2008]. However, recent drifter studies have shown clearly that in

Convectively Driven Mixing in the Bottom Boundary Layer

Creator:: Moum, J. N., Perlin, A., Klymak, J. M., Levine, M. D., Boyd, Timothy John, 1958-2013, and Kosro, P. M.
Abstract:: Closely spaced vertical profiles through the bottom boundary layer over a sloping continental shelf during relaxation from coastal upwelling reveal structure that is consistent with convectively driven mixing. Parcels of fluid were observed adjacent to the bottom that were warm (by several millikelvin) relative to fluid immediately above. On average,...
Resource Type:: Article
Full Text:: thermal dissipation in a convecting surface boundary layer. J. Geophys. Res., 94, 6273–6284. MacCready, P

The Temporal Response of the Length of a Partially Stratified Estuary to Changes in River Flow and Tidal Amplitude

Creator:: Lerczak, James A., Geyer, W. Rockwell, and Ralston, David K.
Abstract:: The temporal response of the length of a partially mixed estuary to changes in freshwater discharge Q𝒻 and tidal amplitude Uₜ is studied using a 108-day time series collected along the length of the Hudson River estuary in the spring and summer of 2004 and a long-term (13.4 yr) record...
Resource Type:: Article
Full Text:: scales over which the forc- ing varies (Kranenburg 1986; Hetland and Geyer 2004; MacCready 2007). If

Subtidal Salinity and Velocity in the Hudson River Estuary: Observations and Modeling

Creator:: Ralston, David K., Geyer, W. Rockwell, and Lerczak, James A.
Abstract:: A tidally and cross-sectionally averaged model based on the temporal evolution of the quasi-steady Hansen and Rattray equations is applied to simulate the salinity distribution and vertical exchange flow along the Hudson River estuary. The model achieves high skill at hindcasting salinity and residual velocity variation during a 110-day period...
Resource Type:: Article
Full Text:: before the forcing changes (Kranen- berg 1986; MacCready 1999; Hetland and Geyer 2004; Banas et al. 2004

Bottom boundary layer flow and salt injection from the continental shelf to slope

Creator:: Brink, K.H. and Shearman, R. Kipp
Abstract:: Austral winter oceanographic measurements from the northwest Australian continental shelf reveal salty water forming evaporatively inshore, moving across the wide shelf near the bottom and into the adjacent open ocean when the shelf edge alongshore flow is equatorward. The salt tongue is absent during more normal conditions, when the poleward...
Resource Type:: Article
Full Text:: ), pp. 933–964, John Wiley, Hoboken, N. J. Garrett, C., P. MacCready, and P. Rhines (1993), Boundary

Bottom boundary layer flow and salt injection from the continental shelf to slope

Creator:: Brink, K. H. and Shearman, R. Kipp
Abstract:: Austral winter oceanographic measurements from the northwest Australian continental shelf reveal salty water forming evaporatively inshore, moving across the wide shelf near the bottom and into the adjacent open ocean when the shelf edge alongshore flow is equatorward. The salt tongue is absent during more normal conditions, when the poleward...
Resource Type:: Article
Full Text:: ), pp. 933–964, John Wiley, Hoboken, N. J. Garrett, C., P. MacCready, and P. Rhines (1993), Boundary

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

Small-Scale Processes in the Coastal Ocean

Creator:: Moum, James N., Nash, Jonathan D., and Klymak, Jody M.
Abstract:: Varied observations over Oregon’s continental shelf illustrate the beauty and complexity of geophysical flows in coastal waters. Rapid, creative, and sometimes fortuitous sampling from ships and moorings has allowed detailed looks at boundary layer processes, internal waves (some extremely nonlinear), and coastal currents, including how they interact. These processes drive...
Resource Type:: Article
Full Text:: . MacCready, P., and P.B. Rhines. 1993. Slippery bottom boundary layers on a slope. Journal of Physical

Modeling Bottom Mixed Layer Variability on the Mid-Oregon Shelf during Summer Upwelling

Creator:: Kurapov, A. L., Allen, J. S., Egber, G. D., and Miller, R. N.
Abstract:: Results from a model of wind-driven circulation are analyzed to study spatial and temporal variability in the bottom mixed layer (BML) on the mid-Oregon shelf in summer 2001. The model assimilates acoustic Doppler profiler velocities from two cross-shore lines of moorings 90 km apart to provide improved accuracy of near-bottom...
Resource Type:: Article
Full Text:: upwelling (Lentz and Trowbridge 1991). Idealized theoretical models (Trowbridge and Lentz 1991; MacCready

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

Numerical modeling of an estuary: A comprehensive skill assessment

Creator:: Warner, John C., Geyer, W. Rockwell, and Lerczak, James A.
Abstract:: Numerical simulations of the Hudson River estuary using a terrain-following, three-dimensional model (Regional Ocean Modeling System (ROMS)) are compared with an extensive set of time series and spatially resolved measurements over a 43 day period with large variations in tidal forcing and river discharge. The model is particularly effective at...
Resource Type:: Article
Full Text:: temporal variability of @s/@x due to variations in runoff. Similarly, MacCready [1999] and Hetland and

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

Structure and composition of a strongly stratified, tidally pulsed river plume

Creator:: Nash, Jonathan, Kilcher, Levi F., and Moum, James N.
Abstract:: The initial composition of a river plume depends on the cumulative turbulent entrainment within the estuary and how this dilutes the supplied freshwater. Here we examine the relative roles of turbulence and freshwater input using observations from the Columbia River estuary and plume during two periods with contrasting river flow....
Resource Type:: Article
Full Text:: within 1 km of these lines’ intersection (at 46�14.40N, 124�9.00W, hereafter referred to as station P) is

Mechanisms Driving the Time-Dependent Salt Flux in a Partially Stratified Estuary

Creator:: Lerczak, James A., Geyer, W. Rockwell, and Chant, Robert J.
Abstract:: The subtidal salt balance and the mechanisms driving the downgradient salt flux in the Hudson River estuary are investigated using measurements from a cross-channel mooring array of current meters, temperature and conductivity sensors, and cross-channel and along-estuary shipboard surveys obtained during the spring of 2002. Steady (subtidal) vertical shear dispersion,...
Resource Type:: Article

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

Wind-driven inner-shelf circulation off central Oregon during summer

Creator:: Kirincich, Anthony R., Barth, John A., Grantham, Brian A., Menge, Bruce A., and Lubchenco, Jane
Abstract:: Velocity measurements from 17 deployments of moored acoustic Doppler current profilers obtained during four summer upwelling seasons are used to describe the crossshelf divergence of Ekman transport in the inner shelf off Oregon. For each deployment the measured surface and bottom cross-shelf transports were compared with estimates of the theoretical...
Resource Type:: Article
Full Text:: importance of stratifica- tion and bottom slope [MacCready and Rhines, 1993; Austin and Lentz, 2002]. Most

The effect of bottom substrate on inherent optical properties: Evidence of biogeochemical processes

Creator:: Boss, Emmanuel and Zaneveld, J. Ronald
Abstract:: Measurements of inherent optical properties (IOP) were conducted over bottoms with different substrates by use of a sampling package mounted on and operated by a SCUBA diver. It was found that in areas of low ambient currents the distribution of IOP varies with bottom type in (1) its value relative...
Resource Type:: Article
Full Text:: . HICKEY, B. M., P. MACCREADY, E. ELLIOTT, AND N. B. KACHEL. 2000. Dense saline plumes in Exuma Sound

ScholarsArchive@OSU

Evaluation of a coastal ocean circulation model for the Columbia River plume in summer 2004

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

On the Upwelling of Downwelling Currents

Three interacting freshwater plumes in the northern California Current System

Convectively Driven Mixing in the Bottom Boundary Layer

The Temporal Response of the Length of a Partially Stratified Estuary to Changes in River Flow and Tidal Amplitude

Subtidal Salinity and Velocity in the Hudson River Estuary: Observations and Modeling

Bottom boundary layer flow and salt injection from the continental shelf to slope

Bottom boundary layer flow and salt injection from the continental shelf to slope

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

Small-Scale Processes in the Coastal Ocean

Modeling Bottom Mixed Layer Variability on the Mid-Oregon Shelf during Summer Upwelling

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

Numerical modeling of an estuary: A comprehensive skill assessment

Internal Tide Reflection and Turbulent Mixing on the Continental Slope

Structure and composition of a strongly stratified, tidally pulsed river plume

Mechanisms Driving the Time-Dependent Salt Flux in a Partially Stratified Estuary

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

Wind-driven inner-shelf circulation off central Oregon during summer

The effect of bottom substrate on inherent optical properties: Evidence of biogeochemical processes

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