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Full-Text Articles in Oceanography

Robust Course-Boundary Extraction Algorithms For Autonomous Vehicles, Chris Roman, Charles Reinholtz Nov 1998

Robust Course-Boundary Extraction Algorithms For Autonomous Vehicles, Chris Roman, Charles Reinholtz

Graduate School of Oceanography Faculty Publications

Practical autonomous robotic vehicles require dependable methods for accurately identifying course or roadway boundaries. The authors have developed a method to reliably extract the boundary line using simple dynamic thresholding, noise filtering, and blob removal. This article describes their efforts to apply this procedure in developing an autonomous vehicle.


Spring 1998, Nsu Oceanographic Center Apr 1998

Spring 1998, Nsu Oceanographic Center

Currents

No abstract provided.


Fall 1998, Nsu Oceanographic Center Jan 1998

Fall 1998, Nsu Oceanographic Center

Currents

No abstract provided.


Fall 1998, Nsu Oceanographic Center Jan 1998

Fall 1998, Nsu Oceanographic Center

Currents

No abstract provided.


Modeling Nutrient And Plankton Processes In The California Coastal Transition Zone: 3. Lagrangian Drifters, J. R. Moisan, Eileen E. Hofmann Oct 1996

Modeling Nutrient And Plankton Processes In The California Coastal Transition Zone: 3. Lagrangian Drifters, J. R. Moisan, Eileen E. Hofmann

CCPO Publications

Two types of numerical Lagrangian drifter experiments were conducted, using a set of increasingly complex and sophisticated models, to investigate the processes associated with the plankton distributions in the California coastal transition zone (CTZ). The first experiment used a one-dimensional (1-D; vertical) time-dependent physical-bio-optical model, which contained a nine-component food web. Vertical velocities, along the track of simulated Lagrangian drifters, derived from a three-dimensional (3-D), primitive equation circulation model developed to simulate the flow observed within the CTZ; were used to parameterize the upwelling and downwelling processes. The second experiment used 880 simulated Lagrangian drifters from a 3-D primitive equation …


The Evolution Of Density-Driven Circulation Over Sloping Bottom Topography, G. H. Wheless, J. M. Klinck May 1995

The Evolution Of Density-Driven Circulation Over Sloping Bottom Topography, G. H. Wheless, J. M. Klinck

CCPO Publications

The short timescale temporal evolution of buoyancy-driven coastal flow over sloping bottom topography is examined using a two-dimensional, vertically averaged numerical model. Winter shelf circulation driven by a coastal ''point source'' buoyancy flux is modeled by initiating a coastal outflow with density anomaly epsilon into well-mixed shelf water. The nonlinear interaction between the time-varying velocity and density field is represented by an advection-diffusion equation. Three cases are discussed: that of a buoyant (epsilon < 0) outflow, a neutral (epsilon = 0) outflow, and a dense (epsilon > 0) outflow. Results are similar to observations from well-mixed shelf areas and show that density-topography interactions are capable of substantially influencing coastal circulation. A negative (buoyant) coastal …


Mississippi River Flood Waters That Reached The Gulf Stream, Peter B. Ortner, Thomas N. Lee, Peter J. Milne, Rod G. Zika, M. Elizabeth Clarke, Guillermo P. Podesta, Peter K. Swart, Patricia A. Tester, Larry P. Atkinson, Walter R. Johnson Jan 1995

Mississippi River Flood Waters That Reached The Gulf Stream, Peter B. Ortner, Thomas N. Lee, Peter J. Milne, Rod G. Zika, M. Elizabeth Clarke, Guillermo P. Podesta, Peter K. Swart, Patricia A. Tester, Larry P. Atkinson, Walter R. Johnson

CCPO Publications

Distributions of physical, biological, and chemical parameters in Florida Keys coastal waters seaward of the reef track were surveyed on September 9 to 13, 1993, as part of a coordinated multidisciplinary study of surface transport processes. A band of low-salinity water was observed along the shoreward side of the Florida Current over the downstream extent of the survey from Miami to Key West. Biological and chemical indicators within the band, together with its large volume, satellite imagery, and a surface drifter trajectory suggested the recent Mississippi River flood as the source.


Wind-Driven Upwelling In The Vicinity Of Cape Finisterre, Spain, Charles R. Mcclain, Shenn-Yu Chao, Larry P. Atkinson, Jack O. Blanton, Frederico De Castillejo Jan 1986

Wind-Driven Upwelling In The Vicinity Of Cape Finisterre, Spain, Charles R. Mcclain, Shenn-Yu Chao, Larry P. Atkinson, Jack O. Blanton, Frederico De Castillejo

CCPO Publications

Observations and numerical simulations of upwelling along the Galician coast of Spain during April 1982 are presented. In situ measurements include shipboard determinations of hydrographic and biological parameters from a grid of stations covering the continental shelf from Cape Finisterre to Ria de Vigo, sea level data from Vigo and La Coruña, and wind stress estimates derived from the ship winds and from surface pressure charts. Sea surface temperature information and pigment concentration information have been obtained from a sequence of satellite images from the NOAA 7 advanced very high resolution radiometer and the Nimbus 7 coastal zone color scanner, …


Effects Of El Nino On Local Hydrography And Growth Of The Giant Kelp, Macrocystis Pyrifera, At Santa Catalina Island, California, Richard C. Zimmerman, Deborah L. Robertson Jan 1985

Effects Of El Nino On Local Hydrography And Growth Of The Giant Kelp, Macrocystis Pyrifera, At Santa Catalina Island, California, Richard C. Zimmerman, Deborah L. Robertson

OES Faculty Publications

Deepened isotherms associated with El Niño resulted in severe nutrient limitation and very low kelp productivity during the last half of 1983. Frond growth rates were so low that terminal blades formed before reaching the surface, eliminating the canopy. Frond initiation rates were also extremely low, resulting in significant reductions in mean plant size. Plants growing above 10m were more severely affected than plants at 20m. Nutrient pulses associated with internal waves are thus critical for survival of Macrocystis pyrifera in nutritionally marginal habitats in Southern California.


Fission Track Dating Of Detrital Zircons From The Scotland Sandstones, Barbados, West Indies, Suzanne Louise Baldwin Jan 1984

Fission Track Dating Of Detrital Zircons From The Scotland Sandstones, Barbados, West Indies, Suzanne Louise Baldwin

Geology Theses and Dissertations

Results of fission track dating of detrital zircons from the Scotland sandstones, Barbados, yield a mixture of ages with several strong groupings from 20-80 Ma, 200-350 Ma, and greater than 500 Ma. Metamict grains were assumed to fall into the greater than 500 Ma population.
The youngest population indicates that the Scotland beds, previously dated by paleontologic methods as Eocene, may actually be as young as late Oligocene. These ages better constrain the timing of deposition for these sediments and support the proposal that the late middle Eocene - early Oligocene Oceanic Fm has overthrust the Scotland beds. This population …


The Influence Of Oceanic Transform Boundaries On The Generation And Evolution Of Oceanic Lithosphere, David G. Gallo Jan 1984

The Influence Of Oceanic Transform Boundaries On The Generation And Evolution Of Oceanic Lithosphere, David G. Gallo

Geology Theses and Dissertations

The first-order geologic and morphologic relationships at, along and proximal to ridge-transform-ridge plate boundaries are used to construct an empirical and speculative tectonic model. The geometry of a ridge-transform intersection necessitates the juxtaposition of relatively cold, thick lithosphere against the truncated end of an accreting plate boundary. The cold face of lithosphere cools the adjacent wedge of asthenosphere rising beneath the axis of accretion and restricts the amount of partial melting thus attenuating the amount of basaltic melt segregated from the asthenosphere per unit time. The manifestation of this cold edge effect is a thinner oceanic crust. At depth, upper …


Volume 7, Number 7 (July 1983), The Solar Ocean Energy Liaison Jul 1983

Volume 7, Number 7 (July 1983), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 7, Number 6 (June 1983), The Solar Ocean Energy Liaison Jun 1983

Volume 7, Number 6 (June 1983), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 7, Number 5 (May 1983), The Solar Ocean Energy Liaison May 1983

Volume 7, Number 5 (May 1983), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 7, Number 4 (April 1983), The Solar Ocean Energy Liaison Apr 1983

Volume 7, Number 4 (April 1983), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 7, Number 3 (March 1983), The Solar Ocean Energy Liaison Mar 1983

Volume 7, Number 3 (March 1983), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 7, Number 2 (February 1983), The Solar Ocean Energy Liaison Feb 1983

Volume 7, Number 2 (February 1983), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 7, Number 1 (January 1983), The Solar Ocean Energy Liaison Jan 1983

Volume 7, Number 1 (January 1983), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Low-Frequency Current And Temperature Variability From Gulf Stream Frontal Eddies And Atmospheric Forcing Along The Southeast U.S. Outer Continental Shelf, Thomas N. Lee, Larry P. Atkinson Jan 1983

Low-Frequency Current And Temperature Variability From Gulf Stream Frontal Eddies And Atmospheric Forcing Along The Southeast U.S. Outer Continental Shelf, Thomas N. Lee, Larry P. Atkinson

CCPO Publications

Low‐frequency current and temperature time series from the outer shelf between Cape Canaveral, Florida, and Cape Romain, South Carolina, are compared with shipboard hydrographic data, satellite VHRR, coastal and buoy winds, and coastal sea level during the period from February to June 1980. Low‐frequency current and temperature variability along the shelf break was primarily produced by cyclonic, cold core Gulf Stream frontal eddies. These disturbances traveled to the north at speeds of 50 to 70 cm s−1 with periods of 5 to 9 days throughout the experiment and produced cold cyclonic perturbations of the northward mean flow and temperature …


Cape Romain And The Charleston Bump: Historical And Recent Hydrographic Observations, J.J. Singer, L. P. Atkinson, J. O. Blanton, J. A. Yoder Jan 1983

Cape Romain And The Charleston Bump: Historical And Recent Hydrographic Observations, J.J. Singer, L. P. Atkinson, J. O. Blanton, J. A. Yoder

CCPO Publications

A review and analysis of historical and new hydrographic data are presented for the Charleston Bump region. An area of doming isotherms is identified primarily between 31.5° and 34.5°N and the 200 and 400 m isobaths. The highest incidences of doming are found off Long Bay (86%), Cape Fear (38%), and Cape Romain (25%). Evidence suggests that low salinity shelf water collects in the doming area off Long Bay in July and that seasonal fluctuations in the depth of the main thermocline layer in this area are linked to Gulf Stream transport and local winds. At times there is a …


Volume 6, Number 12 (December 1982), The Solar Ocean Energy Liaison Dec 1982

Volume 6, Number 12 (December 1982), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 6, Number 11 (November 1982), The Solar Ocean Energy Liaison Nov 1982

Volume 6, Number 11 (November 1982), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 6, Number 10 (October 1982), The Solar Ocean Energy Liaison Oct 1982

Volume 6, Number 10 (October 1982), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 6, Number 9 (September 1982), The Solar Ocean Energy Liaison Sep 1982

Volume 6, Number 9 (September 1982), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 6, Number 8 (August 1982), The Solar Ocean Energy Liaison Aug 1982

Volume 6, Number 8 (August 1982), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 6, Number 7 (July 1982), The Solar Ocean Energy Liaison Jul 1982

Volume 6, Number 7 (July 1982), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 6, Number 6 (June 1982), The Solar Ocean Energy Liaison Jun 1982

Volume 6, Number 6 (June 1982), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 6, Number 5 (May 1982), The Solar Ocean Energy Liaison May 1982

Volume 6, Number 5 (May 1982), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 6, Number 4 (April 1982), The Solar Ocean Energy Liaison Apr 1982

Volume 6, Number 4 (April 1982), The Solar Ocean Energy Liaison

The OTEC Liaison

No abstract provided.


Volume 6, Numbers 1 & 2 (February & March 1982), The Solar Ocean Energy Liaison Feb 1982

Volume 6, Numbers 1 & 2 (February & March 1982), The Solar Ocean Energy Liaison

The OTEC Liaison

Note that this issue should be Numbers 2 & 3, not Numbers 1 & 2.