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Water Characteristics At 200 Cl/T In The Intertropical Indian Ocean During The Southwest Monsoon, G. S. Sharma Jan 1972

Water Characteristics At 200 Cl/T In The Intertropical Indian Ocean During The Southwest Monsoon, G. S. Sharma

Journal of Marine Research

Depth, salinity, and oxyty on the 200-cl/t isanosteric surface have been mapped for the intertropical Indian Ocean during the southwest monsoon season. The data used for this study have come from 522 stations occupied during the International Indian Ocean Expedition....


A Numerical Experiment For The Path Of The Kuroshio, A. R. Robinson, B. A. Taft Jan 1972

A Numerical Experiment For The Path Of The Kuroshio, A. R. Robinson, B. A. Taft

Journal of Marine Research

There are two stable patterns of flow for the Kuroshio south of Japan: (i) flow along the continental slope, all the way east to the Izu-Ogasawara Ridge; and (ii) a southeastward meander away from the continental slope south of Shikoku, out over deep water. We have modeled the Ku.roshio as a steady free inertial jet that extends to the bottom over at least a portion of its path....


Redox Potentials By Equilibration, W. G. Breck Jan 1972

Redox Potentials By Equilibration, W. G. Breck

Journal of Marine Research

Defined in this paper is a new approach to Eh that allows determination of the redox level of aerated natural waters by a principle of equilibration, thus avoiding the disadvantages of using electrodes in association with any particular chemical system, such as platinum/oxygen.


Arsenate In The Western North Atlantic And Adjacent Regions, David L. Johnson, Michael E.Q. Pilson Jan 1972

Arsenate In The Western North Atlantic And Adjacent Regions, David L. Johnson, Michael E.Q. Pilson

Journal of Marine Research

The concentration of arsenate was measured at 25 stations in the North Atlantic, Caribbean, and Gulf of Mexico….


A Three-Dimensional Current Meter For Estuarine Applications, Wm. J. Wiseman Jr., R. M. Crosby, D. W. Pritchard Jan 1972

A Three-Dimensional Current Meter For Estuarine Applications, Wm. J. Wiseman Jr., R. M. Crosby, D. W. Pritchard

Journal of Marine Research

A curr ent meter that is capable of measuring the high-frequency fluctuations of the three-dimensional velocity vector has been developed. The meter works on a doppler-shift principle. At high velocities, the meter has been shown to have an accuracy of better than 3%.


On Properties Of Seawater Defined By Temperature, Salinity, And Pressure, George Veronis Jan 1972

On Properties Of Seawater Defined By Temperature, Salinity, And Pressure, George Veronis

Journal of Marine Research

Hydrographic station data, consisting principally of temperature and salinity determinations, have been used by physical oceanographers to develop a climatological picture of the distribution of these quantities in the oceans of the world. Density as determined by Knudsen's formula, taken together with hydrostatic and geostrophic dynamics, also provides a crude picture of oceanic flow....


Plutonium-239 In And Over The Atlantic Ocean, V. T. Bowen, K. M. Wong, V. E. Noshkin Jan 1971

Plutonium-239 In And Over The Atlantic Ocean, V. T. Bowen, K. M. Wong, V. E. Noshkin

Journal of Marine Research

Plutonium-239 has been found in over-ocean aerosols in about the same ratio to Strontium-90 as that reported over land. In seawater, Pu-239:Sr-90 ratios are shown to be less than half of those in over-ocean aerosols, confirming geochemical separation of these nuclides in the ocean. It is suggested that the sedimentation of Pu-239 may be more involved with biological processes than has been found for Ce-144 or Pm-147.


Seiche Motions For A Basin Of Rectangular Plan And Of Nonuniform Depth, D. J. Clarke Jan 1971

Seiche Motions For A Basin Of Rectangular Plan And Of Nonuniform Depth, D. J. Clarke

Journal of Marine Research

The two-dimensional modes of oscillation of a fluid in a rectangular basin are found from the linearized equations of motion in terms of transport variables by employing an extension of Galerkin's method. The depth function is arbitrary in so far as the vertical accelerations remain negligible and is herein chosen as a first-degree function of the space variables to illustrate the technique....


Ocean Spectra For The High-Frequency Waves As Determined From Airborne Radar Measurements, G. R. Valenzuela, M. B. Laing, J. C. Daley Jan 1971

Ocean Spectra For The High-Frequency Waves As Determined From Airborne Radar Measurements, G. R. Valenzuela, M. B. Laing, J. C. Daley

Journal of Marine Research

The possibilities of using radar to obtain oceanographic information are described. Ocean spectra for the short gravity and gravity-capillary waves have been derived from radar crosssection measurements for vertical polarization at 428 MHz, 1228 MHz, 4455 MHz, and 8910 MHz....


Some Exact Solutions To The Equations Describing An Ideal-Fluid Thermocline, Pierre Welander Jan 1971

Some Exact Solutions To The Equations Describing An Ideal-Fluid Thermocline, Pierre Welander

Journal of Marine Research

The equations that describe a steady ideal-fluid motion have a first integral that expresses a functional relationship between the potential vorticity P, the density ϱ, and the Bernoulli function B: P = F(ϱ,B).


Observations On Short-Period Internal Waves In Massachusetts Bay, David Halpern Jan 1971

Observations On Short-Period Internal Waves In Massachusetts Bay, David Halpern

Journal of Marine Research

Temperature measurements made 9 km west of a prominent sill in Massachusetts Bay indicate that the seasonal thermocline heaves up and down in phase with periods of 6 to 8 minutes for about 2.5 hours during flood tide. A sudden rise in the general temperature level accompanies the onset of the short-period motion....


New Evidence Of The Equatorial Undercurrent East Of The Galapagos Islands, Merritt R. Stevenson, Bruce A. Taft Jan 1971

New Evidence Of The Equatorial Undercurrent East Of The Galapagos Islands, Merritt R. Stevenson, Bruce A. Taft

Journal of Marine Research

Measurements made between the Galapagos Islands and Ecuador in June and October 1967 revealed the existence of a subsurface high-salinity core aligned beneath the southern edge of the Equatorial Front….


Spatial Structure Of Inertial-Period Motions In A Two-Layered Sea, Based On Observations, Friedrich Schott Jan 1971

Spatial Structure Of Inertial-Period Motions In A Two-Layered Sea, Based On Observations, Friedrich Schott

Journal of Marine Research

Spatial coherence and phase relationships of inertial-period motions have been inferred from an experiment with four moorings in the northern North Sea where the density profile was almost two-layered. The inertial-period currents showed antiphase between the upper and lower layers; the coherence between both layers was high. The inertial-period temperature fluctuations were in phase throughout the thermocline.


On The Wind-Driven Circulation Of A Stratified Ocean, J. A. Johnson Jan 1971

On The Wind-Driven Circulation Of A Stratified Ocean, J. A. Johnson

Journal of Marine Research

A theoretical study is made of the response of a stratified ocean to an applied wind stress. The ocean has been divided into an Ekman layer, a thermal layer, and an almost isothermal abyssal layer. The velocity and temperature fields were found by matching with the Ekman layer suction produced by the wind stress and by an upwelling condition at the eastern boundary. The surface temperature was determined principally by advection of heat with the oceanic circulation.


Panama Basin Deep Water----Properties And Circulation, Norman P. Laird Jan 1971

Panama Basin Deep Water----Properties And Circulation, Norman P. Laird

Journal of Marine Research

Temperature, salinity, and dissolved-oxygen data from the deep waters of the Panama Basin suggest that water enters the Basin through a single pass near Ecuador and subsequently spreads to the north and west. The flow is blocked in places by subsills, and warming occurs through mixing and geothermal heating. The bottom water appears to have a residence time of about 175 years, and heat flow is believed to be important in the renewal process in the bottom water.


The Measurement Of Respiratory Electron-Transport Activity In Marine Phytoplankton, T. T. Packard Jan 1971

The Measurement Of Respiratory Electron-Transport Activity In Marine Phytoplankton, T. T. Packard

Journal of Marine Research

A tetrazolium-reduction method for the measurement of the respiratory electron-transport activity in plankton is described . The method is sensitive to 0.03 µg cell nitrogen and can be used to estimate total plankton respiration.


On The Circulation Of The Intermediate Water In The Southwestern Atlantic Ocean, José L. Buscaglia Jan 1971

On The Circulation Of The Intermediate Water In The Southwestern Atlantic Ocean, José L. Buscaglia

Journal of Marine Research

In early studies of the Antarctic Intermediate Water in the South Atlantic it was assumed that the flow was mostly thermohaline and meridional. However, there is evidence that the wind-driven subtropical anticyclonic circulation in the South Atlantic Ocean extends to and includes the Intermediate Water, as in other oceans.


Relationship Of Potential Temperature And Silicate In The Deep Waters Between Cape Lookout, North Carolina, And Bermuda, Unnsteinn Stefánsson, Larry P. Atkinson Jan 1971

Relationship Of Potential Temperature And Silicate In The Deep Waters Between Cape Lookout, North Carolina, And Bermuda, Unnsteinn Stefánsson, Larry P. Atkinson

Journal of Marine Research

The relationship between potential temperature…


The East Australian Current As A Free Inertial Jet, J. S. Godfrey, A. R. Robinson Jan 1971

The East Australian Current As A Free Inertial Jet, J. S. Godfrey, A. R. Robinson

Journal of Marine Research

Paths of the East Australian Current are calculated, employing the assumption that changes in the total cross-stream vorticity due to path curvature are balanced by changes in the planetary vorticity and vortex stretching. With reasonable assumptions for the velocity structure, the resulting paths follow the continental slope for the whole known length of the current and then gradually move into deeper water....


A Fluorometric Method For Determining Chlorophylls A, B, And C, Michael E. Loftus, James H. Carpenter Jan 1971

A Fluorometric Method For Determining Chlorophylls A, B, And C, Michael E. Loftus, James H. Carpenter

Journal of Marine Research

A method for the determination of chlorophylls a, b, and c by fluorometric techniques is presented. The effects of accessory carotenoids and chlorophyll derivatives on the accuracy of this method are analyzed….


The Electromagnetic Field Of Long And Intermediate Water Waves, J. C. Larsen Jan 1971

The Electromagnetic Field Of Long And Intermediate Water Waves, J. C. Larsen

Journal of Marine Research

The electromagnetic field induced by long and intermediate water waves (e.g., tsunami) is dependent on the time variation and spatial variation of the water motion and on the earth's electrical conductivity structure. The water motion is approximated by a plane progressive wave on a nonrotating flat infinite ocean of uniform depth....


Variations In Subcuticular Acid Phosphatase Activity During The Molting Cycle Of The Euphausiid Crustacean, Thysanoessa Raschii (M. Sars) Hansen, J. B. Jennings, Linda G. Halverson Jan 1971

Variations In Subcuticular Acid Phosphatase Activity During The Molting Cycle Of The Euphausiid Crustacean, Thysanoessa Raschii (M. Sars) Hansen, J. B. Jennings, Linda G. Halverson

Journal of Marine Research

A histochemical technique, applicable to intact euphausiids, has been used in the laboratory to demonstrate variations in the level of subcuticular acid phosphatase activity during the molting cycle of Thysanoessa raschii; it shows that there is a marked increase in such activity during the 24 hours in which ecdysis occurs. We suggest that the technique could form a useful tool in future studies on euphausiid biology since it would allow, for example, assessments of the numbers of individuals in any one collection or population that is passing through this particular 24-hour period at the time of sampling.


A Biaxial Propeller Current-Meter System For Fixed-Mount Applications, Glenn A. Cannon, Donald W. Pritchard Jan 1971

A Biaxial Propeller Current-Meter System For Fixed-Mount Applications, Glenn A. Cannon, Donald W. Pritchard

Journal of Marine Research

A biaxial propeller current-meter system for use in shallow water, where instrumentation can be attached to rigid bottom-mounted towers, has been developed at the Chesapeake Bay Institute. The use of two like sensors to measure the horizontal-velocity vector eliminates the problem of matching time constants in rotor-vane systems. The propellers have a noncosine response to the angle of attack of the flow. However, the data recorded by two propellers mounted at right angles are sufficient to correct for the noncosine response.


On Potential Density In The Deep South Atlantic Ocean, Ronald J. Lynn Jan 1971

On Potential Density In The Deep South Atlantic Ocean, Ronald J. Lynn

Journal of Marine Research

There is a great contrast between the relative distributions of potential density referred too decibars and of potential density referred to 4000 decibars in the deep water of the South Atlantic Ocean. Both parameters are useful in a descriptive analysis of deep water; the former is an identifier of water origin, the latter graphically displays stability in the deep ocean and can be used to infer deep-ocean geostrophic flow.


A Stable Spar-Buoy Platform For Mounting Instrumentation, David H. Shonting, Alfred H. Barrett Jan 1971

A Stable Spar-Buoy Platform For Mounting Instrumentation, David H. Shonting, Alfred H. Barrett

Journal of Marine Research

A simple, relatively portable, and inexpensive spar buoy has been constructed to provide a platform for supporting instrumentation above and below the ocean's free surface. The buoy is 18.9 m long and weighs 76 kg in air; the combined ballast and instrument payload weigh 65 kg. The buoy consists of buoyant sections that are easily dismantled and may be varied in number to alter the buoy's overall length, draft, and payload....


Measurement Of A Three-Dimensional Field Of Water Velocities At A Depth Of One Meter In An Estuary, R. C. Seitz Jan 1971

Measurement Of A Three-Dimensional Field Of Water Velocities At A Depth Of One Meter In An Estuary, R. C. Seitz

Journal of Marine Research

The 3-dimensional field of water motion in a natural estuary has been measured at a depth of 1 m below the surface. Resulting Fourier transforms of the 3-component records of water velocities at 1 m have been compared with Fourier transforms of the depth-attenuated surface-wave velocity record--obtained from a direct measurement of the surface-wave field.


A Comparison Of Direct And Electric-Current Measurements In The Florida Current, Frank Chew, William S. Richardson, George A. Berberian Jan 1971

A Comparison Of Direct And Electric-Current Measurements In The Florida Current, Frank Chew, William S. Richardson, George A. Berberian

Journal of Marine Research

Simultaneous measurements of surface velocity obtained in 1967 by means of geomagnetic electrokinetograph and free-instrument techniques aboard two ships in the Florida Current off Ft. Pierce, Florida have been compared . The results show a varying degree of agreement in magnitude across the stream and good agreement in direction. A surprising result is the high seabed conductance.


A Comparison Of Direct Measurements And G.E.K. Observations In The Florida Current Off Miami, T. B. Sanford, W. J. Schmitz Jr. Jan 1971

A Comparison Of Direct Measurements And G.E.K. Observations In The Florida Current Off Miami, T. B. Sanford, W. J. Schmitz Jr.

Journal of Marine Research

Electrical measurements represent an indirect measure of the velocity structure of an ocean current. An interpretation of such measurements requires consideration of many influences, including the distribution of the vertically averaged velocity, of the bottom topography, and of the electrical-conductivity structure of the ocean and the sea bed....


Cesium-137 In The North Atlantic Measured By Selective Absorption In Situ, Stuart L. Kupferman Jan 1971

Cesium-137 In The North Atlantic Measured By Selective Absorption In Situ, Stuart L. Kupferman

Journal of Marine Research

By means of selective absorption in situ, Cesium-137 was measured in November and December 1968 in two depth profiles (near 39°N, 69°W) and in ten widely scattered surface samples in the North Atlantic Ocean. The surface concentrations of Cs-137 are compatible with the surface concentrations of Sr-90 obtained by other workers in the same latitudinal range....


Asymptotic Extreme-Value Distributions Of Wave Heights In The Open Ocean, H. C.S. Thom Jan 1971

Asymptotic Extreme-Value Distributions Of Wave Heights In The Open Ocean, H. C.S. Thom

Journal of Marine Research

Application of the Fréchet extreme-value distribution to extreme wave heights is discussed. Annual extreme significant wave-height data for 12 Ocean Station Vessels have been fitted by the distribution. These distributions have been adjusted to extreme wave-height distributions by applying a scale transformation to the significant wave-height distributions based on previous theoretical and empirical studies of wave-height observations.