Showing papers in "Continental Shelf Research in 1989"

TL;DR: In this article, time-averaged concentrations of sediment resuspended by trawls from various areas of the Middle Atlantic Bight continental shelf were estimated using a simple mathematical model and National Marine Fisheries Service records of commercial trawling activity.

TL;DR: In this article, a wide diversity of biocoenoses, among which the seagrass Posidonia meadow is prevalent, were analysed for their stable carbon isotope ratios, to assess carbon flows within the food chains.

TL;DR: In this article, a secondary Changjiang river plume is found to play an important role in both the circulation and sediment transport inside the bay, which may be related to the rapid accretion at the south shore of Hangzhou Bay.

TL;DR: In this paper, a descriptive study of these phenomena based on 10 years of satellite imagery and two directed research cruises in the area is presented, and it is demonstrated that the mean location of the landward boundary of the Agulhas Current becomes more diffuse downstream and that its modal location relative to the 200 m isobath depends on distance downstream.

TL;DR: Abundances of all taxa declined during the summers of both years apparently in response to hypoxic conditions, with copepods most dramatically affected, dropping from springtime peak abundances to virtually zero in a one-month period of time.

TL;DR: In this paper, near-bottom current and suspended sediment measurements above a sandy clayey silt bed on the California continental shelf are used to estimate the near-bed suspended sediment reference concentration, Ca, and the bed shear stress, τ 0.

TL;DR: In this article, a numerical model for the Simpson-Hunter criterion predicts the occurrence of strong tidal mixing in four regions of the Hwanghae: northwestern, mid-western, and southwestern regions of Korea, and the mid-east coast of China.

TL;DR: The shallow continental shelf of the central Great Barrier Reef province is characterized by an across-shelf gradient of terrigenous to carbonate sedimentary facies, and is a region subjected to physical disturbances from commercial prawn trawling and, less frequently, from summer cyclones and storms as mentioned in this paper.

TL;DR: In this article, the authors analyzed zooplankton community structure and copepod species composition in samples obtained during spring and winter from three areas of the northern Gulf of Mexico: near the Mississippi River outflow, off Cape San Blas, and in the central Gulf.

TL;DR: One-equation and (k-ɛ ) turbulence models with Boussinesq viscosity and algebraic stress closures are applied to predict the vertical structure of turbidity currents.

TL;DR: In this article, the authors reported that the majority of right whales (Eubalaena glacialis) were sighted during random aerial transects over the Great South Channel region located between Georges Bank and Cape Cod in April to July in 1979-1981, 1984 and 1985.

TL;DR: In this paper, a two-dimensional model of internal tides in the Bay of Biscay is presented using simple linear equations as a first step, the action of the barotropic tidal current over the bottom topography is simulated; this results in the generation of internal tide over the continental slope and their propagation in the bay.

TL;DR: In this paper, an extension of Ekman's (1905, Arkiv foer Matematik, Astronomi och Fysik, 2, 11) theory to incorporate oscillatory forcing indicates that at the latitude where the inertial and forcing frequencies are the same, the sense of rotation of the current profile with depth will change.

TL;DR: The uppermost few centimeters of deposits from the Ouest-Gironde vasiere (muddy area) reveal a dynamic zonation, reflected in lithological sequences, biological activity and radioisotopic concentrations as discussed by the authors.

TL;DR: In this paper, the same authors described a silt and clay-size mineral assemblages from eight piston cores from the fiords and shelf on the western margin of Baffin Bay, Arctic Canada.

TL;DR: In this article, the authors show that the transport rate on the sandwave crest is two orders of magnitude greater than in sandwave troughs, suggesting that sand is recirculated in a complex manner similar to the circulatory pattern described elsewhere for large tidal sand banks; sand may be classified as intermediate between flow transverse and flow parallel bedforms.

TL;DR: In this paper, a thorough analysis of tide gauge data is presented for the Lake Maracaibo system, where local resonance for semidiurnal constituents and strong meteorological effects at S1 and S2 frequencies are clearly identified from the admittance curves.

TL;DR: A greater degree of relationships for species composition, occurrence and abundance was found over the outer shelf than among coastal regions.

TL;DR: In this paper, the authors present information on nitrogen nutrients dissolved in the sediment pore waters of the oligotrophic northwestern Mediterranean Sea, and evaluate the diffusion of Nitrogen in the seafloor.

TL;DR: In this paper, the authors used CTD data from a repeated CTD section in central Shelikof Strait during 1985-1987 to derive volume transport and the distribution of near-bottom physical properties.

TL;DR: In this article, both linear and power-law relationships between total pigment concentration and attenuation coefficient have been examined for concentrations up to 1 mg m −3, with linear models suggesting very low values of dissolved organic material in winter and power law model coefficients were found to be very sensitive to a postulated presence or absence of a dissolved component.

TL;DR: In this paper, a theory is considered for the inertial response of a stratified flat-bottomed channel, with straight walls, to longshore wind, focusing particularly on transient variables, such as inertial oscillations and waves.

TL;DR: The response of St. Georges Bay, Nova Scotia, to Tropical Storm Blanche in July 1975 is described in this article, where the authors show that wind-induced set-down over the southern Magdalen Shallows, initial downwind acceleration in the surface layer of the Bay with compensating return flow in the lower layer, strong downwelling on the eastern side of the bay and upwelling in the western side, mixing induced by strong vertical current shears, near-inertial current oscillations following the storm that are damped by friction, and

TL;DR: In this article, a three-dimensional diagnostic model is constructed to investigate the steady circulation on a cuspate continental shelf, and the curvature of the coastline and variable bottom topography are included in the analysis.

TL;DR: In this paper, a section of current measurements in Johnstone Strait is re-examined with the help of cross spectra and of a decomposition into orthogonal modes, the water levels at a nearby gauging station serving as a reference signal.

TL;DR: The daily surface heat budget of a polynya in the coastal waters off Queen Maud Land, Antarctica is studied for the period from 23 December 1986 to February 1987 using the surface meteorological data collected on board the Swedish vessel M.S. Thuleland as discussed by the authors.

TL;DR: Longshore surface properties and zooplanktonic taxa near the Southern California coast were sampled by pump, and the percent similarity and Bray-Curtis indices were compared as bases for the establishment of assemblages by dendrograms as mentioned in this paper.