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Inshore Circulation Of The Agulhas Current Off Natal, E. H. Schumann
Inshore Circulation Of The Agulhas Current Off Natal, E. H. Schumann
Journal of Marine Research
The variability of the inshore circulation of the Agulhas Current on the Natal continental shelf region is investigated using historical ship-based data, and more recent measurements made on moorings deployed at various points along the coast. The existence is confirmed of a recirculation flow inshore of the Agulhas Current on the wider shelf region, although emphasis is laid on the inherent variability. It is apparent that the different flow regimes along the coast are primarily due to topographic effects; in particular, a narrowing shelf serves to reduce the variability being transmitted downstream.
On The Currents And Water Masses North Of The Antilles/Bahamas Arc, John T. Gunn, D. Randolph Watts
On The Currents And Water Masses North Of The Antilles/Bahamas Arc, John T. Gunn, D. Randolph Watts
Journal of Marine Research
The Antilles Current, which is supposed to flow from the Atlantic North Equatorial Current along the Antilles and Bahamas island arc and contribute to the Gulf Stream, does not always exist. Data from the two most extensive grids of hydrographic surveys yet available in this region, one in summer and one in winter, show that mesoscale eddies dominate the baroclinic current field and the distribution of water properties....
On The Structure Of The Deep Gulf Stream, R. M. Hendry
On The Structure Of The Deep Gulf Stream, R. M. Hendry
Journal of Marine Research
Tlk zonal and temporal structure of the mean and low-frequency flow beneath the Gulf Stream at 55W is explored in an analysis of 17 months of current and temperature measurements at 4000 m depth….
On The Movements Of Deep Mesoscale Eddies In The North Atlantic, Doron Nof
On The Movements Of Deep Mesoscale Eddies In The North Atlantic, Doron Nof
Journal of Marine Research
A simplified three layer model is considered in order to examine the movements of deep mesoscale eddies such as the isolated Mediterranean eddies observed off the Bahamas. These anticyclonic eddies are found in the permanent thermocline more than 6000 km away from their parent water mass and are characterized by a lens-like cross section....
Temporal And Spatial Patterns Of Monsoonal Upwelling Along Arabia: A Modem Analogue For The Interpretation Of Quaternary Sst Anomalies, Warren L. Prell
Temporal And Spatial Patterns Of Monsoonal Upwelling Along Arabia: A Modem Analogue For The Interpretation Of Quaternary Sst Anomalies, Warren L. Prell
Journal of Marine Research
Several lines of evidence suggest that monsoonal circulation and its associated upwelling in the Arabian Sea have experienced significant fluctuations during the past 105 years. To construct an analogue model to interpret such changes, we have used the monthly average sea-surface temperature (SST) data from Hastenrath and Lamb (1979) to define the temporal and spatial pattern of upwelling along Arabia....
Is There A Seasonal Variation In The Agulhas Current?, Alan F. Pearce, Marten L. Gründlingh
Is There A Seasonal Variation In The Agulhas Current?, Alan F. Pearce, Marten L. Gründlingh
Journal of Marine Research
Historical results are critically re-examined for indications of seasonal variability in the surface core speed of the Agulhas Current. Defining the Current core as water flowing southwestward at more than 1 m s-1, it is found that there is no major seasonal variation in mean flow. This is confirmed by more recent direct current measurements.
Variability In The Central Equatorial Indian Ocean Part I: Ocean Dynamics, Michael J. Mcphaden
Variability In The Central Equatorial Indian Ocean Part I: Ocean Dynamics, Michael J. Mcphaden
Journal of Marine Research
Time series of simultaneous wind stress, ocean temperature and velocity from the Island of Gan (00°41'S, 73°10'E) in the equatorial Indian Ocean are examined for the period January 1973-May 1975. Means, trends, and variance at 1 and 2 cycles per year are removed by regression techniques and compared to existing equatorial ocean theories....
Wave Damping By Monomolecular Surface Films And Their Chemical Structure. Part I: Variation Of The Hydrophobic Part Of Carboxylic Acid Esters, Heinrich Hühnerfuss, Philipp Lange, Wolfgang Walter
Wave Damping By Monomolecular Surface Films And Their Chemical Structure. Part I: Variation Of The Hydrophobic Part Of Carboxylic Acid Esters, Heinrich Hühnerfuss, Philipp Lange, Wolfgang Walter
Journal of Marine Research
Plunger generated 1.0, 1.3, 1.8, 2.0, 2.3, and 2.5 Hz waves have been used to investigate the direct wave damping effect of carboxylic acid ester surface films….
A Preliminary Comparison Of Selected Numerical Eddy-Resolving General Circulation Experiments With Observations, William J. Schmitz Jr., William R. Holland
A Preliminary Comparison Of Selected Numerical Eddy-Resolving General Circulation Experiments With Observations, William J. Schmitz Jr., William R. Holland
Journal of Marine Research
Results from several numerical experiments based on one class of eddy-resolving gyre-scale models have been compared kinematically with observations. The model oceans are forced by a simplified steady wind stress distribution in basins with idealized coastlines and bottom topography....
Spatial And Temporal Variability Of Chlorophyll Distributions And Geostrophic Current Estimates On The Peru Shelf At 9s, Alex W. Herman
Spatial And Temporal Variability Of Chlorophyll Distributions And Geostrophic Current Estimates On The Peru Shelf At 9s, Alex W. Herman
Journal of Marine Research
Profiles of chlorophyll a, temperature and salinity were measured over the Peru Shelf at 9S. Data were collected with a Batfish vehicle profiling in a sawtooth pattern over a cycle distance of ≈ 1 km at a depth ranging from near surface to ≈ 80 m….
On The Upwelling Circulation Over The Wide Shelf Off Peru: 1. Circulation, Gary Shaffer
On The Upwelling Circulation Over The Wide Shelf Off Peru: 1. Circulation, Gary Shaffer
Journal of Marine Research
During November-December 1977, a modest physical field experiment was carried out over the wide shelf off northern Peru near 9S. Repeated sections of temperature and absolute current profiles were run along two lines with 60 km alongshore separation. Local winds were moderate, rather uniform and favorable for upwelling throughout the study period....
Radionuclides From Windscale Discharges I: Nonequilibrium Tracer Experiments In High-Latitude Oceanography, Hugh D. Livingston, Vaughan T. Bowen, Stuart L. Kupferman
Radionuclides From Windscale Discharges I: Nonequilibrium Tracer Experiments In High-Latitude Oceanography, Hugh D. Livingston, Vaughan T. Bowen, Stuart L. Kupferman
Journal of Marine Research
The releases of soluble radionuclides from the nuclear fuel reprocessing plant at Windscale represent for some artificial radionuclides a major addition to the inventories due to nuclear test fallout on the northern hemisphere….
The Vertical Flux Of Particulate Organic Nitrogen In The Sea: Decomposition Of Amino Acids In The Peru Upwelling Area And The Equatorial Atlantic, Cindy Lee, Carolyn Cronin
The Vertical Flux Of Particulate Organic Nitrogen In The Sea: Decomposition Of Amino Acids In The Peru Upwelling Area And The Equatorial Atlantic, Cindy Lee, Carolyn Cronin
Journal of Marine Research
Marine particulate matter samples were collected in moored and free-drifting sediment traps deployed off the coast of Peru during February, 1978. Three types of amino acids were analyzed in these samples: free extractable amino acids (FEA), hydrolyzed extractable amino acids (HEA) and total hydrolyzed amino acids (fHA). FEA and HEA were also analyzed in moored trap samples from the PARFLUX E station in the equatorial Atlantic Ocean....
A Comparison Of Moored And Free-Drifting Sediment Traps Of Two Different Designs, Nick Staresinic, Klaus Von Bröckel, Nenad Smodlaka, C. Hovey Clifford
A Comparison Of Moored And Free-Drifting Sediment Traps Of Two Different Designs, Nick Staresinic, Klaus Von Bröckel, Nenad Smodlaka, C. Hovey Clifford
Journal of Marine Research
The Kiel conical sediment trap and a 3:1 right cylinder were simultaneously deployed in both free-drifting and moored modes on four separate occasions over the Peruvian shelf in order to compare downward flux measurements derived from each….
Modeling Salt-Fingering Structures, Otto Zeman, John L. Lumley
Modeling Salt-Fingering Structures, Otto Zeman, John L. Lumley
Journal of Marine Research
Results are presented of calculations with a second-order turbulence model which has been modified to evolve continuously from full turbulent convection to thermo-haline convection, under appropriate circumstances. A three-layer system is simulated, with a salt-fingering interface between two convectively-driven turbulent layers. Experimental results on the salt/heat flux ratio are reproduced.
Variability In The Central Equatorial Indian Ocean, Part Ii: Oceanic Heat And Turbulent Energy Balances, Michael J. Mcphaden
Variability In The Central Equatorial Indian Ocean, Part Ii: Oceanic Heat And Turbulent Energy Balances, Michael J. Mcphaden
Journal of Marine Research
Heat and turbulent energy balances in the central equatorial Indian Ocean are examined using over two years (January 1973-May 1975) of simultaneous oceanic and atmospheric measurements from the island of Gan (00°41S, 73°10'E)….
On Forced Coastal Trapped Waves At Low Latitudes In A Stratified Ocean, R. D. Romea, J. S. Allen
On Forced Coastal Trapped Waves At Low Latitudes In A Stratified Ocean, R. D. Romea, J. S. Allen
Journal of Marine Research
The response on the continental shelf and slope of a baroclinic ocean to driving by an alongshore wind stress at the coast…
The Influence Of The Meandering Guiana Current And Amazon River Discharge On Surface Salinity Near Barbados, Gary A. Borstad
The Influence Of The Meandering Guiana Current And Amazon River Discharge On Surface Salinity Near Barbados, Gary A. Borstad
Journal of Marine Research
The seasonal surface salinity regime near Barbados, West Indies is explained in terms of the oceanography of the area. Because of its position relative to the complex and meandering Guiana Current along the northeast coast of South America, the island of Barbados receives mixtures of two fundamentally different surface water types....
Perspectives Of Research On Detritus: Do Factors Controlling The Availability Of Detritus To Macroconsumers Depend On Its Source?, K. R. Tenore, L. Cammen, S. E.G. Findlay, N. Phillips
Perspectives Of Research On Detritus: Do Factors Controlling The Availability Of Detritus To Macroconsumers Depend On Its Source?, K. R. Tenore, L. Cammen, S. E.G. Findlay, N. Phillips
Journal of Marine Research
Various factors have been suggested as regulating the availability of detritus to detritivores, e.g., particle-size and microbial dynamics, nutritional composition of detritus per se, and chemical inhibitors/ enhancers. These factors might vary in importance depending on detritus source: fecal pellets, vascular plants, or seaweed-derived detritus. We review the literature to evaluate the above factors and suggest that future research on detritus should consider regulatory mechanisms which depend on detritus type.
Daily Patterns Of Fluorescence In Vivo In The Central Equatorial Pacific, Patrick J. Setser, Norman L. Guinasso Jr., David R. Schink
Daily Patterns Of Fluorescence In Vivo In The Central Equatorial Pacific, Patrick J. Setser, Norman L. Guinasso Jr., David R. Schink
Journal of Marine Research
A daily cycle of fluorescence in vivo was strikingly apparent in surface waters of the central equatorial Pacific between latitudes 4N and 10S, but not in waters to the north or south of this zone. These changes in fluorescence did not represent changes in chlorophyll-a concentration, but rather a photoinhibition of fluorescence by ambient light. Higher nutrient and chlorophyll-a concentrations were found in the region where cycling occurred....
Growth And Predation Activity At Deep-Sea Hydrothermal Vents Along The Galápagos Rift, Donald C. Rhoads, Richard A. Lutz, Robert M. Cerrato, Eugene C. Revelas
Growth And Predation Activity At Deep-Sea Hydrothermal Vents Along The Galápagos Rift, Donald C. Rhoads, Richard A. Lutz, Robert M. Cerrato, Eugene C. Revelas
Journal of Marine Research
Growth rates of unclassified mussels collected from hydrothermal vents on the Pacific Ocean (2500 m) are among the highest recorded for deep-sea species. Mature mussels have mean growth rates of about 1 cm yr-1 which are comparable to growth rates of shallow water mussels....
The Influence Of The Meandering Guiana Current On Surface Conditions Near Barbados - Temporal Variations Of Trichodesmium (Cyanophyta) And Other Plankton, Gary A. Borstad
The Influence Of The Meandering Guiana Current On Surface Conditions Near Barbados - Temporal Variations Of Trichodesmium (Cyanophyta) And Other Plankton, Gary A. Borstad
Journal of Marine Research
The temporal fluctuations of the surface layer Trichodesmium (Cyanophyta) populations off Barbados which occur at roughly three-month intervals are shown to be accompanied by in-phase fluctuations of both the numbers and species composition of other phytoplankton and surface dwelling zooplankton....
Analysis Of Dimethyl Sulfonium Compounds In Marine Algae, Robert H. White
Analysis Of Dimethyl Sulfonium Compounds In Marine Algae, Robert H. White
Journal of Marine Research
A method is described for the quantitation of the dimethyl sulfide which is released from marine algae by treatment with alkali. Results show that this dimethyl sulfide originates from at least two separate pools of dimethyl sulfonium compounds present in the algae....
Primary Productivity And Chemical Composition Of Marine Snow In Surface Waters Of The Southern California Bight, Alice L. Alldredge, James L. Cox
Primary Productivity And Chemical Composition Of Marine Snow In Surface Waters Of The Southern California Bight, Alice L. Alldredge, James L. Cox
Journal of Marine Research
The primary productivity of flocculent marine snow (fragile and amorphous macroscopic particulates) was measured for the first time using samples collected quantitatively in surface waters of the Southern California Bight….
On The Interaction Between Surface Waves And Undulations On The Seabed, A. G. Davies
On The Interaction Between Surface Waves And Undulations On The Seabed, A. G. Davies
Journal of Marine Research
When surface water waves propagate over undulating seabed topography, the resulting interaction creates a near-bed velocity field which has important implications for sediment transport. Linear perturbation theory is used here to examine this interaction for the case of two-dimensional oscillatory uniplanar nonseparating flow, in which the surface wave crests are parallel to the crests of the bottom undulations....
Three-Dimensional Modeling Of Tracers In The Deep Pacific Ocean Ii. Radiocarbon And The Circulation, Manuel E. Fiadeiro
Three-Dimensional Modeling Of Tracers In The Deep Pacific Ocean Ii. Radiocarbon And The Circulation, Manuel E. Fiadeiro
Journal of Marine Research
The radiocarbon data from the GEOSECS Pacific expedition was used to test the abyssal circulation model presented in part I of this series. The results show that a uniform increase of the upwelling rate from the bottom to the top of the model cannot explain the qualitative features of the radiocarbon distribution....
Variability In Surface Chlorophyll A At A Shelf-Break Front, John Marra, R. W. Houghton, David C. Boardman, Patrick J. Neale
Variability In Surface Chlorophyll A At A Shelf-Break Front, John Marra, R. W. Houghton, David C. Boardman, Patrick J. Neale
Journal of Marine Research
We report an extensive underway sampling of temperature and chlorophyll a in the region of the shelf/slope front in the New York Bight in early spring. Variability in chlorophyll a and frontal structure is analyzed at three spatial scales….
The Effects Of Bioturbation On The Initiation Of Motion Of Intertidal Sands, W. D. Grant, L. F. Boyer, L. P. Sanford
The Effects Of Bioturbation On The Initiation Of Motion Of Intertidal Sands, W. D. Grant, L. F. Boyer, L. P. Sanford
Journal of Marine Research
The results of laboratory flume experiments on initiation of sediment motion in natural marine sediments (fine sand) are reported. Sediment cores were taken from an intertidal region during all seasons of the year over a four-year period….
Depositional Patterns Of Modem Orinoco/Amazon Muds On The Northern Venezuelan Shelf, John D. Milliman, Jorge Butenko, Jean Paul Barbot, Jan Hedberg
Depositional Patterns Of Modem Orinoco/Amazon Muds On The Northern Venezuelan Shelf, John D. Milliman, Jorge Butenko, Jean Paul Barbot, Jan Hedberg
Journal of Marine Research
Modern muds derived from the Orinoco and Amazon Rivers are gradually covering early Holocene (shallow-water) reefs and sands on the continental shelf and upper slope north of the Paria peninsula. Throughout much of the area the muds are more or less continuous and locally as thick as 20 m....
Spacial Distributions Of Major Phytoplankton Community Components In Narragansett Bay At The Peak Of The Winter-Spring Bloom, Franklin H. Farmer, Gabriel A. Vargo, Clarence A. Brown Jr., Olin Jarrett Jr.
Spacial Distributions Of Major Phytoplankton Community Components In Narragansett Bay At The Peak Of The Winter-Spring Bloom, Franklin H. Farmer, Gabriel A. Vargo, Clarence A. Brown Jr., Olin Jarrett Jr.
Journal of Marine Research
The horizontal distribution of phytoplankton in western Narragansett Bay at the height of the 1978 winter-spring bloom was characterized using data from an airborne fluorosensor to extend in situ point measurements of chlorophyll a and phytoplankton population composition to linear or area coverage....