Showing papers in "Continental Shelf Research in 2000"

TL;DR: In this paper, a revised textural classification of gravel-free muddy sediments based on the adaptation, modification and expansion of previous schemes using ternary plots is presented, which can be used to divide a depositional environment into textural sub-environments or facies.

TL;DR: In this article, the authors used observations that were made during vertically stratified conditions in the South Atlantic Bight to assess the factors that control the export of radium isotopes.

TL;DR: In this article, a conceptual model for the advection of sediment to the mid shelf is proposed in which river plume sediments are trapped on the inner shelf either due to a weak front or the rapid input of sediment from a confined plume, and form a thin layer of fluid mud.

TL;DR: Sediment cores and water column measurements of suspended sediment and flow conditions were taken on the continental shelf off the Atchafalaya River in Louisiana to examine the development and reworking of a seabed flood layer with seasonal variations in river discharge and hydrodynamics as discussed by the authors.

TL;DR: In this article, the authors used synthetic aperture radar (SAR) images from ERS-1 and Ers-2 to study the characteristics of internal waves in the East China Sea.

TL;DR: In this article, the migration of the Kuroshio and mesoscale flow pattern was studied using the historical ship-board acoustic Doppler current profiler (Sb-ADCP) current velocity and hydrographic measurements, moored current velocity, water temperature and salinity time series, snapshot current velocity observations and infrared images.

TL;DR: In this paper, X-radiographs collected during an extensive suite of box coring cruises revealed that these layers extended along-shelf for up to 50 km, were in water depths of 50-110m and were up to 8 cm thick.

TL;DR: In this article, the importance of biological processes on the sediment characteristics and the morphology of a mudflat in the Westerschelde (The Netherlands) was investigated, where a transect in the Biezelingse Ham mudflat was sampled on a monthly basis.

TL;DR: The Sepik River as mentioned in this paper has an estimated annual sediment load of ∼85×106 ǫt−1, and empties directly into a submarine canyon that transverses a narrow continental shelf.

TL;DR: In this article, an analysis of old and new hydrographic data, surface temperature observations and satellite measurements show that this upwelling occurs in a tightly circumscribed geographic area, which may have a profound effect on the nutrient availability, the stratication and the primary productivity of speci cally the eastern Agulhas Bank south of South Africa.

TL;DR: In this article, the authors measured the impact of current velocity on material fluxes associated with undisturbed sediment and its natural benthic community and quantified sediment erodability in terms of critical erosion velocities (U crit ), mean erosion rate and the mass of sediment eroded in relation to increasing current velocity.

TL;DR: In this article, the authors examined the seasonal and spatial variability of chlorophyll a distribution and primary productivity in the southern East China Sea from the inner shelf to the offshore region based on observations along a cross-shelf transect during 1991-1995.

TL;DR: In this paper, the authors used phase-averaged current velocities measured with ship-borne ADCP on two rounds separated by 3.5 cycles of the dominant M2 tide.

TL;DR: In this article, the first level is obtained using tidal range as the discriminator, followed by sub-divisions defined by exposure to waves and by mudflat slope, where steep slope is separated into steep slope > 0.04 and low slope 1000 kg/m−3.

TL;DR: In this paper, a systematic relationship between bulk density, water content and sediment composition is presented for a variety of geographic environments, showing that high correlations between these parameters are observed, all regions showing characteristic trends reflecting local environmental conditions.

TL;DR: In this paper, the Mehby Rule has been used to compare high and concave mudshores with low concave ones, and a top-down model, called S-factor analysis, has been developed to a semi-quantitative state by way of demonstrating its possibilities.

TL;DR: In contrast to seasonal floods that characterize moderate to large rivers, oceanic floods occur over short time periods on small rivers as mentioned in this paper, where sediment is delivered to the ocean under a narrow range of oceanographic conditions.

TL;DR: In this article, the various hydrodynamic forcings responsible for sediment dynamics over the intertidal mudflat of Brouage (Baie de Marennes-Oleron) are analyzed.

TL;DR: In an initial experiment, box cores were collected from the Humber estuary Skeffling mudflats (April 1995) and transported back to the laboratory for measurement in a linear flume as mentioned in this paper.

TL;DR: The head of the Eel Canyon was investigated to understand the nature of sedimentation associated with winter floods from the EEL River, located about 10 km to the east.

TL;DR: The sources and diagenesis of organic matter in a sediment core from the Swinnplate backbarrier area near Spiekeroog Island in the northwest German Wadden Sea have been examined using stable carbon isotopes, 14 C -ages and lipid biomarker data.

TL;DR: In this paper, the potential of predicting critical erosion shear stresses from microphytobenthos chlorophyll a surface concentrations in the upper mm of the sediment surface was investigated.

TL;DR: In this paper, bottom-boundary-layer velocity profiles, bed stresses and suspended sediment concentration profiles were measured with instrumented tripods in four contrasting shelf and semi-enclosed bay environments that are presently accumulating fine sediments.

TL;DR: In this article, sediment cores were taken at the mudflat at Kongsmark in the microtidal Lister Dyb tidal area (Denmark), at the BOA bridge in the mesotidal Dollard estuary (Netherlands), and at the Skeffling mudflat in the macrotidal Humber estuary.

TL;DR: In this article, the authors present the results of the first dedicated research cruise that has encompassed the hydrography of the whole Natal Bight and show that the topographically induced upwelling cell at the northern end of the Bight was characterised by lower temperatures, higher salinities, higher nutrients and higher chlorophyll a values.

TL;DR: Water column measurements of 234 Th were made at three stations in the shelf-slope regime and one offshore station in the Beaufort Sea, August-September 1995, to quantify rates of scavenging and particle export as discussed by the authors.

TL;DR: In this paper, the hydrodynamic and sediment transport processes on the Dutch inner-shelf were studied on the basis of short and medium-term field experiments during fair-weather and storm conditions.

TL;DR: In this paper, the dynamics of size-fractionated (20μm) chlorophyll a and primary productivity measured using the stable isotope tracer technique at three water regimes were compared in the southern East China Sea (the Kuroshio, the upwelling and the continental shelf).

TL;DR: In this article, distributions of dissolved organic carbon and particulate organic carbon (POC) were observed along a cross-shelf transect in the southern East China Sea from 1994 to 1996.

TL;DR: In this article, the relative role of waves and tides in determining sediment dynamics at contrasting locations within the extensive abandoned reclamations of the Blyth estuary, Suffolk is investigated.