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Modeling upwelling circulation off the Oregon coast

Creator:: Gan, Jianping and Allen, John S.
Abstract:: Time‐dependent, three‐dimensional, upwelling circulation on the continental shelf off the Oregon coast is studied using a primitive equation numerical model. A limited area domain with a high‐resolution curvilinear grid is utilized. The response of the coastal ocean to forcing by observed wind stress and heat flux during the summer 2001...
Resource Type:: Article
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A modeling study of shelf circulation off northern California in the region of the Coastal Ocean Dynamics Experiment 2. Simulations and comparisons with observations

Creator:: Gan, Jianping and Allen, John S.
Abstract:: This is the second part of a modeling study of wind-forced flow on the continental shelf off northern California in the region (37°-40°N) of the Coastal Ocean Dynamics Experiment (CODE). Gan and Allen [2002] analyzed the shelf flow response to idealized wind stress forcing in a process-oriented study. The study...
Resource Type:: Article
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Spectral particulate attenuation and particle size distribution in the bottom boundary layer of a continental shelf

Creator:: Boss, Emmanuel, Pegau, W. Scott, Gardner, Wilford D., Zaneveld, J. Ronald, Barnard, Andrew H., Twardowski, Michael S., Chang, G. C., and Dickey, T. D.
Abstract:: Spectral attenuation and absorption coefficients of particulate matter and collocated hydrographic measurements were obtained in the Mid-Atlantic Bight during the fall of 1996 and the spring of 1997 as part of the Coastal Mixing and Optics experiment. Within the bottom boundary layer (BBL) the magnitude of the beam attenuation decreased...
Resource Type:: Article
Full Text:: . Gardner, 2 J. Ronald V. Zaneveld, • Andrew H. Barnard, • Michael S. Twardowski, • G. C. Chang, 3,4 and T

Forcing a three-dimensional, hydrostatic, primitive-equation model for application in the surf zone : 2. application to DUCK94

Creator:: Newberger, P. A. and Allen, John S.
Abstract:: A three‐dimensional primitive‐equation model for application to the nearshore surf zone has been developed. This model, an extension of the Princeton Ocean Model (POM), predicts the wave‐averaged circulation forced by breaking waves. All of the features of the original POM are retained in the extended model so that applications can...
Resource Type:: Article
Full Text:: ) 16. (top) Depth-averaged velocities U and V (m s�1) and surface elevation h (m). (middle) Across

Spatial and temporal variability of absorption by dissolved material at a continental shelf

Creator:: Boss, Emmanuel, Pegau, W. Scott, Zaneveld, J. Ronald, and Barnard, Andrew H.
Abstract:: Optical properties of dissolved (colored dissolved organic material (CDOM)) and particulate matter and hydrographic measurements were obtained at the Mid-Atlantic Bight during the fall of 1996 and the spring of 1997 as part of the Coastal Mixing and Optics experiment. To assess the temporal and spatial variability, time series were...
Resource Type:: Article
Full Text:: . Chen, R. F., D. B. Chadwick, and S. H. Lieberman, The application of time-resolved spectrofluorometry

Alongshore currents and mesoscale variability near the shelf edge off northwestern Australia

Creator:: Brink, K. H., Bahr, Frank, and Shearman, R. Kipp
Abstract:: Shelf break conditions and alongshore flow off northwestern Australia are studied during the strongly evaporative conditions of austral winter 2003. Present results, along with those of previous authors, confirm that a poleward, fresh Leeuwin current core is normally found near the shelf break. Salinity increases alongshore toward the southwest. Although...
Resource Type:: Article
Full Text:: near the shelf edge off northwestern Australia K. H. Brink,1 F. Bahr,1 and R. K. Shearman2 Received

Analysis and comparison of three ecosystem models

Creator:: Newberger, Priscilla A., Allen, John S., and Spitz, Yvette
Abstract:: Three-component (NPZ), four-component (NPZD), and five-component (NNPZD) nitrogen-based ecosystem models are compared. The fixed points of the zerodimensional systems, with no spatial variation except light attenuation by water, are determined. A linear-stability analysis shows that unstable steady solutions exist for all three models. Time-periodic solutions are found in these regions....
Resource Type:: Article
Full Text:: P. A. Newberger, J. S. Allen, and Y. H. Spitz College of Oceanic and Atmospheric Sciences, Oregon

The front on the Northern Flank of Georges Bank in spring : 2. Cross-frontal fluxes and mixing

Creator:: Ullman, David S., Dale, Andrew C., Hebert, Dave, and Barth, John A.
Abstract:: Hydrographic observations made with an undulating vehicle carrying a CTD and concurrent shipboard ADCP velocity observations over a 12‐day period are combined to investigate vertical mixing and cross‐frontal fluxes on the Northern Flank of Georges Bank. The CTD density time series is analyzed to detect the presence of vertical overturns,...
Resource Type:: Article
Full Text:: spring: 2. Cross-frontal fluxes and mixing David S. Ullman,1 Andrew C. Dale,2 Dave Hebert,1 and John A

Assimilation of surface velocity data into a primitive equation coastal ocean model

Creator:: Oke, Peter R., Allen, John S., Miller, Robert N., Egbert, Gary D., and Kosro, P. Michael, 1951-
Abstract:: A data assimilation system (DAS) of the wind‐driven, mesoscale shelf circulation off the Oregon coast is developed. The DAS assimilates low‐pass filtered surface velocity measurements, obtained from land‐based high‐frequency coastal radar arrays, into a primitive equation coastal ocean model using a sequential optimal interpolation scheme. Inhomogeneous and anisotropic estimates of...
Resource Type:: Article
Full Text:: that consists of the prognostic variables (u v q S U V h) at all horizontal grid locations at all

Evolution of 1996-1999 La Niña and El Niño conditions off the western coast of South America: A remote sensing perspective

Creator:: Carr, Mary-Elena, Strub, P. Ted, Thomas, Andrew C., and Blanco, Jose Luis
Abstract:: We present the evolution of oceanographic conditions off the western coast of South America between 1996 and 1999, including the cold periods of 1996 and 1998–1999 and the 1997–1998 El Niño, using satellite observations of sea level, winds, sea surface temperature (SST), and chlorophyll concentration. Following a period of cold...
Resource Type:: Article
Full Text:: high between March 1997 and May 1998. The anomalies were greatest between 5�S and 15�S, although they

ScholarsArchive@OSU

Modeling upwelling circulation off the Oregon coast

A modeling study of shelf circulation off northern California in the region of the Coastal Ocean Dynamics Experiment 2. Simulations and comparisons with observations

Spectral particulate attenuation and particle size distribution in the bottom boundary layer of a continental shelf

Forcing a three-dimensional, hydrostatic, primitive-equation model for application in the surf zone : 2. application to DUCK94

Spatial and temporal variability of absorption by dissolved material at a continental shelf

Alongshore currents and mesoscale variability near the shelf edge off northwestern Australia

Analysis and comparison of three ecosystem models

The front on the Northern Flank of Georges Bank in spring : 2. Cross-frontal fluxes and mixing

Assimilation of surface velocity data into a primitive equation coastal ocean model

Evolution of 1996-1999 La Niña and El Niño conditions off the western coast of South America: A remote sensing perspective

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