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Articles 1951 - 1980 of 2567
Full-Text Articles in Entire DC Network
The Structure And Development Of Rifted Midoceanic Rises, Tjeerd H. Van Andel
The Structure And Development Of Rifted Midoceanic Rises, Tjeerd H. Van Andel
Journal of Marine Research
Midoceanic rises can be divided into two categories: rifted and nonrifted. Rifted rises are characterized by a median valley, high relief, a thick second layer, and the presence of metamorphic and deep intrusive rocks. Rifted rises are believed to have slow spreading rates of less than 2 cm/year....
Shallow Currents Along The Northeastern Coast Of South America, William G. Metcalf
Shallow Currents Along The Northeastern Coast Of South America, William G. Metcalf
Journal of Marine Research
It has generally been considered that the Guiana Current carries South Atlantic Central water in an uninterrupted flow along the northeastern coast of South America and then into the Caribbean Sea. Certain phenomena observed in the western tropical Atlantic and in the Caribbean indicate that the picture is not that simple....
Erratum
Journal of Marine Research
Erratum in A model for thermohaline circulation in an ocean of finite depth, by G. T. Needler…
A Demonstration Of Magnification Of Dynamic Topography At The Thermocline, D. J. Baker Jr.
A Demonstration Of Magnification Of Dynamic Topography At The Thermocline, D. J. Baker Jr.
Journal of Marine Research
Since the ocean is hydrostatic to a very good approximation, it is well known that dynamic topography at the surface (for example, across the Gulf Stream) is inverted and magnified at the thermocline by a factor proportional to the average density difference of the regions above and below the thermocline....
On The Eastward Flow Of Water In The Western Pacific South Of The Equator, François Jarrige
On The Eastward Flow Of Water In The Western Pacific South Of The Equator, François Jarrige
Journal of Marine Research
From December 1965 to August 1967, the R/V CORIOLIS of the Centre O.R.S.T.O.M. of Nouméa made nine cruises along 170°E, from 20°S to 4°N. The eastward component of the geostrophic current relative to 1000 db was calculated, and the results from all cruises indicate an eastward flow near 10°S....
Studies At Oyster Bay In Jamaica, West Indies. Iii. Measurements Of Underwater-Sunlight Spectra, H. H. Seliger, W. G. Fastie
Studies At Oyster Bay In Jamaica, West Indies. Iii. Measurements Of Underwater-Sunlight Spectra, H. H. Seliger, W. G. Fastie
Journal of Marine Research
Spectral distributions of ambient underwater sunlight in Oyster Bay, Falmouth Harbor, Jamaica, West Indies, have been measured during the diurnal rise in the stimulable bioluminescent intensity of the marine dinoflagellate, Pyrodinium bahamense. In addition to the changes in light intensity during this period, there are large changes in the relative spectral distributions, as functions of both time and depth in the Bay. The blue-to-red intensity ratios vary by factors of 10 to 100.
A Detached Eddy In The Gulf Of Mexico, W. D. Nowlin Jr., J. M. Hubertz, R. O. Reid
A Detached Eddy In The Gulf Of Mexico, W. D. Nowlin Jr., J. M. Hubertz, R. O. Reid
Journal of Marine Research
This note presents some preliminary results of a still-incomplete detailed analysis of observations on the property distributions and currents in the eastern part of the Gulf of Mexico, with primary emphasis on the Eastern Loop Current. Observations were obtained aboard the R/V ALAMINOS in June 1966, 1967.
Effects Of Deep-Sea Stratification And Current On Edgewaves, Lawrence A. Mysak
Effects Of Deep-Sea Stratification And Current On Edgewaves, Lawrence A. Mysak
Journal of Marine Research
The effects of deep-sea density stratification and longshore current on trapped edgewaves traveling over a sloping continental shelf that drops off vertically to deep water of constant depth are investigated. The stratification is idealized with a two-layer model, and the current is assumed to be confined to the deep-sea region and to the upper layer of fluid....
Autospectra Of Observed Particle Motions In Wind Waves, David H. Shonting
Autospectra Of Observed Particle Motions In Wind Waves, David H. Shonting
Journal of Marine Research
Autospectra of observed particle motions in ocean waves are presented. The spectra show the dominant peaks associated with the frequencies of the visually observed waves. Examination of the autospectra relative to depth reveals a strong attenuation of spectral energy, particularly at the higher frequencies; the peaks associated with the waves tend to redden the deeper the wave motions are observed....
Electrochemical Standardization Of The Dehydrogenase Assay Used In The Estimation Of Respiration Rates, Theodore T. Packard, Michael L. Healy
Electrochemical Standardization Of The Dehydrogenase Assay Used In The Estimation Of Respiration Rates, Theodore T. Packard, Michael L. Healy
Journal of Marine Research
A primary coulometric titration is proposed as a standardization technique for the succinate dehydrogenase assay used in the estimation of respiration rates in marine plankton. The coulometric method, which is shown to be simple, accurate, and reproducible, eliminates the difficulties of using a chemical reducing agent. An alternative method using polarography is also discussed.
Paleogene Sediment From A Fracture Zone Of The Mid-Atlantic Ridge, Richard Cifelli, Walter H. Blow, William G. Melson
Paleogene Sediment From A Fracture Zone Of The Mid-Atlantic Ridge, Richard Cifelli, Walter H. Blow, William G. Melson
Journal of Marine Research
A dredge haul from a transverse fracture zone in the equatorial Atlantic Ocean yielded sediment of the Paleocene and the early Eocene ages. This sediment is the oldest thus far recorded from the Atlantic outside of the continental margins. Its occurrence is consistent with the view that transverse fracture zones are faults along which sea-floor spreading has taken place.
Davit For Handling Piston Corers, John C. Burke
Davit For Handling Piston Corers, John C. Burke
Journal of Marine Research
Most core rigs over 15 feet (5 m) in length are cumbersome, awkward, and in bad weather somewhat dangerous to handle. On all Woods Hole Oceanographic Institution ships, coring is done over the side, using a hydraulically operated A-frame. In recent years, two methods have been used to transfer the core rig from its point of assembly to its 'down' position outboard, attached to the lowering cable....
Nitrate Reduction And The Occurrence Of A Deep Nitrite Maximum In The Ocean Off The West Coast Of South America, Manuel Fiadeiro, J. D.H. Strickland
Nitrate Reduction And The Occurrence Of A Deep Nitrite Maximum In The Ocean Off The West Coast Of South America, Manuel Fiadeiro, J. D.H. Strickland
Journal of Marine Research
Between 10°S and 23°S off the coast of Peru, at depths where the oxygen concentration is less than 0.2 ml/l, a pronounced secondary nitrite maximum is found; for the same or gr eater depth range, results indicate a loss of nitrate in the water column. It has been assumed that either nitrate reduction has taken place or there has been an arrested oxidation of organic nitrogen....
Seiche Motions For One-Dimensional Flow, D. J. Clarke
Seiche Motions For One-Dimensional Flow, D. J. Clarke
Journal of Marine Research
The linearized equations of motion for the case of one-dimensional flow are solved as a sequence of approximations for the modes of oscillation of a fluid in an enclosed basin by using Galerkin's method from the calculus of variations.
Studies At Oyster Bay In Jamaica, West Indies. I. Intensity Patterns Of Bioluminescence In A Natural Environment, H. H. Seliger, W. D. Mcelroy
Studies At Oyster Bay In Jamaica, West Indies. I. Intensity Patterns Of Bioluminescence In A Natural Environment, H. H. Seliger, W. D. Mcelroy
Journal of Marine Research
Night and day patterns in the intensities of stimulable bioluminescense in Pyrodinium bahamense were measured during the period of April 1966 through May 1967 in Oyster Bay, Falmouth Harbor, Jamaica, West Indies….
Spectral Dissipation Of Finite-Depth Gravity Waves Due To Turbulent Bottom Friction, Klaus Hasselmann, J. I. Collins
Spectral Dissipation Of Finite-Depth Gravity Waves Due To Turbulent Bottom Friction, Klaus Hasselmann, J. I. Collins
Journal of Marine Research
The spectral dissipation of finite-depth random gravity waves is evaluated for a given empirical relationship between the local bottom stress and the wave field. The dissipation is quasilinear. Computations for a quadratic friction law yield satisfactory agreement with wave measurements at two stations in the Gulf of Mexico.
The International Oceanographic Tables, L. R.A. Capurro, W. D. Nowlin Jr.
The International Oceanographic Tables, L. R.A. Capurro, W. D. Nowlin Jr.
Journal of Marine Research
Tables I and II of the series International Oceanographic Tables have been in print for longer than a year. The oceanographic community is indebted to members of the Joint Panel on Oceanographic Tables and Standards (JPOTS), particularly to its chairman, Roland A. Cox, and to others, for the work represented by these tables.
Seasonal Sequence Of Bioluminescence And The Occurrence Of Endogenous Rhythms In Oceanic Waters Off Woods Hole, Massachusetts, Charles S. Yentsch, J. C. Laird
Seasonal Sequence Of Bioluminescence And The Occurrence Of Endogenous Rhythms In Oceanic Waters Off Woods Hole, Massachusetts, Charles S. Yentsch, J. C. Laird
Journal of Marine Research
Seasonal sequences of bioluminescense in waters around Woods Hole were measured in 1961 to 1963. Peak activities occurred in October-November (once) and in April-May (twice). Bioluminescense at night is usually quantitatively greater than during the day. Greater differences during summer correlate with the seasonal maximum in solar radiation....
Wave-Wave Interactions Of Surface And Internal Waves, Kern E. Kenyon
Wave-Wave Interactions Of Surface And Internal Waves, Kern E. Kenyon
Journal of Marine Research
A resonant energy-transfer theory is applied to the weak wave-wave interactions of random surface gravity waves and internal gravity waves in a constant Väisälä-frequency (exponential-density) ocean….
Studies At Oyster Bay In Jamaica, West Indies. Ii. Effacts Of Flow Patterns And Exchange On Bioluminescent Distributions, J. H. Carpenter, H. H. Seliger
Studies At Oyster Bay In Jamaica, West Indies. Ii. Effacts Of Flow Patterns And Exchange On Bioluminescent Distributions, J. H. Carpenter, H. H. Seliger
Journal of Marine Research
From July 1966 to July 1967, regular observations and some experiments were carried out in Oyster Bay at the eastern end of Falmouth Harbor, Jamaica, W. I. This paper gives a general description of the area; it reports observations on the tidal movement, the density currents, the wind force and direction, and the water discharge by the Martha Brae River; and it correlates the flow patterns in Oyster Bay with observed bioluminescent distributions
Further Investigation Of The Influence Of The Peripheral Antarctic Water Discharge On The Circumpolar Current, Victor Barcilon
Further Investigation Of The Influence Of The Peripheral Antarctic Water Discharge On The Circumpolar Current, Victor Barcilon
Journal of Marine Research
One- and two-layer models of the Antarctic Ocean are examined. Both the peripheral discharge (caused by melting and ablation) and the surface wind stress (due to an easterly wind system) are taken into account. It is shown that these two driving mechanisms partially counteract each other. As a result, the net zonal transport is smaller than that in the case of purely wind driving.
Inertial Oscillations In An Ekman Layer Containing A Horizontal Discontinuity Surface, Joseph P. Pandolfo, Philip S. Brown Jr.
Inertial Oscillations In An Ekman Layer Containing A Horizontal Discontinuity Surface, Joseph P. Pandolfo, Philip S. Brown Jr.
Journal of Marine Research
Solutions are obtained for systems of equations that determine the development of velocity profiles in an infinitely deep fluid system subjected to Coriolis accelerations and composed of two layers of viscous fluid differing in density, viscosity, and geostrophic velocity. The density, viscosity, and horizontal pressure gradient are assumed to remain constant in space and time within each layer and to differ discontinuously at the horizontal interface between the layers....
Tsunami Response For Islands: Verification Of A Numerical Procedure, A. C. Vastano, R. O. Reid
Tsunami Response For Islands: Verification Of A Numerical Procedure, A. C. Vastano, R. O. Reid
Journal of Marine Research
A numerical integration procedure is employed to evaluate the response of the water level in the near fi eld of an island due to the incidence of plane monochromatic gravity waves that have periods in the tsunami range. Verification of the numerical procedure is restricted to two axially symmetric islands for which analytical solutions are available. The first case is that of a vertical cylinder of circular cross section in water of constant depth....
On The Wave-Induced Difference In Mean Sea Level Between The Two Sides Of A Submerged Breakwater, M. S. Longuet-Higgins
On The Wave-Induced Difference In Mean Sea Level Between The Two Sides Of A Submerged Breakwater, M. S. Longuet-Higgins
Journal of Marine Research
Very simple formulae are derived for the difference in mean level between the two sides of a submerged breakwater when waves are incident on it at an arbitrary angle. The formulae apply also to waves undergoing refraction due to changes in depth and to waves in open channel transitions.
A Harmonic Method For Predicting Shallow-Water Tides, Bernard D. Zetler, Robert A. Cummings
A Harmonic Method For Predicting Shallow-Water Tides, Bernard D. Zetler, Robert A. Cummings
Journal of Marine Research
The development of an objective technique for identifying significant hidden frequencies in the spectrum makes it possible to accurately predict shallow-water tides by harmonic methods. For Anchorage, Alaska, the 114 constituents used include frequencies in every species (cycles per day) from 0 to 12. The larger set of constituents improved the predictions in times of high and low waters, range of tide, and shape of curve. The stationary characteristics of some of the added constituents have been tested with three years of Philadelphia data.
A Characterization Of The Gulf Of Mexico Waters In Winter, W. D. Nowlin Jr., H. J. Mclellan
A Characterization Of The Gulf Of Mexico Waters In Winter, W. D. Nowlin Jr., H. J. Mclellan
Journal of Marine Research
The results of a rapid survey of the Gulf of Mexico in the winter of 1962 are presented. Variations in the characteristics of the water in several core layers are described. Circulation has been examined on the basis of dynamic computations and G.E.K. measurements. In the eastern Gulf, water enters through Yucatan Strait and leaves through Florida Strait, flowing in an anticyclonic loop that extends well into the Gulf....
The Wave-Drift Current, John A.T. Bye
The Wave-Drift Current, John A.T. Bye
Journal of Marine Research
The irrotational wave-drift current associated with the one-dimensional eq uilibrium wave spectrum is calculated, and by comparison with observation, it is shown that in many situations this current may make an important contribution to surface-drift velocities. One of the interesting features of the irrotational current profile is a remarkable affinity to the logarithmic profile of similarity theory, both formally and quantitatively.
Further Observations On The Secondary Nitrite Maximum In The Northern Equatorial Pacific, Warren S. Wooster
Further Observations On The Secondary Nitrite Maximum In The Northern Equatorial Pacific, Warren S. Wooster
Journal of Marine Research
The secondary nitrite maximum was observed in May 1965 at nine stations south of the boundary between the western extension of the California Current and the Nor th Equatorial Current. A ssociation of high nitrite concentrations with low dissolved-oxygen concentrations and high salinity in the Equatorial Pacific salinity maximum suggests that the northern boundary of the secondary nitrite maximum is related to the northern limit of penetration by Equatorial Pacific water.
The Determination Of Urea In Seawater, B. S. Newell, B. Morgan, Jane Cundy
The Determination Of Urea In Seawater, B. S. Newell, B. Morgan, Jane Cundy
Journal of Marine Research
A clinical method for the determination of urea in blood and urine (Beale and Croft 1961) has been modified for the determination of smaller quantities of urea (1-20 µg N/l) in seawater.
Thermostad, The Antonym Of Thermocline, R. C. Seitz
Thermostad, The Antonym Of Thermocline, R. C. Seitz
Journal of Marine Research
In standard oceanographic usage the suffix "-cline" denotes a layer in which there is a relatively large vertical gradient of the given property. However, oceanographers have no term available to denote the contrasting feature: a layer of water in which there is a relative minimum of the absolute value of the vertical gradient....