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Saturday, August 1, 2020 | History

2 edition of Continental shelf wave propagation on the Labrador Shelf found in the catalog.

Continental shelf wave propagation on the Labrador Shelf

Savithri Narayanan

Continental shelf wave propagation on the Labrador Shelf

by Savithri Narayanan

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  • 19 Currently reading

Published by Science Branch, Dept. of Fisheries and Oceans in St. John"s, Nfld .
Written in English

    Subjects:
  • Continental shelf -- Labrador.,
  • Water waves.

  • Edition Notes

    Statementby Savithri Narayanan and Ian Webster.
    SeriesCanadian technical report of fisheries and aquatic sciences -- no. 1699
    ContributionsWebster, Ian., Canada. Dept. of Fisheries and Oceans. Newfoundland Region. Science Branch.
    Classifications
    LC ClassificationsSH"223"C35"no.1699
    The Physical Object
    Paginationv, 22 p. :
    Number of Pages22
    ID Numbers
    Open LibraryOL21038558M

    Box cores taken from surficial sediments of the central Texas continental shelf reveal the presence of thin (1–10 cm) discrete beds of sand and silt in an otherwise clayey sedimentary section. The discrete beds are characterized by vertical upward fining grain‐size trends, grading from very fine sand to fine by: The continental shelf and the slope are part of the continental margin. The shelf area is commonly subdivided into the inner continental shelf, mid continental shelf, and outer continental shelf, each with their specific geomorphology and marine biology. The character of the shelf changes dramatically at the shelf break, where the continental slope begins.

    Wave propagation is particularly likely to be important in this region, since the Patagonian Shelf is wide, and wide shelves tend to result in more rapid wave propagation (e.g. Hsueh ()). Very little is known about the modal structure of these coherent signals, although theory suggests they are more likely to be baroclinic at low latitudes Cited by: The shelf wave speed from numerical modelling is 11 m/s for the Labrador and Newfoundland shelf edge 6 and 16 m/s for the Scotian Shelf Thiebaut and Vennell's 7 analysis of tide-gauge data obtained a phase speed of 16 m/s for a free continental shelf wave propagating from the Newfoundland Shelf to the Scotian by:

    On approach to the shelf, however, the wave energy is strongly refracted by the continental slope and scattered into baroclinic modes trapped to the shelf edge such that little energy penetrates onto the shelf (SMITH, a). Furthermore, frictional dissipation limits the influence of the waves on the shelf . Continental shelf – defined by IHO () as “a zone adjacent to a continent (or around an island) and extending from the low water line to a depth at which there is usually a marked increase of slope towards oceanic depths”. The low-water mark is taken in this study as the 0 m depth contour. The shelf break (i.e. the line along which there is marked increase of slope at the seaward.


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Continental shelf wave propagation on the Labrador Shelf by Savithri Narayanan Download PDF EPUB FB2

About Cookies, including instructions on how to turn off cookies if you wish to do so. By continuing to browse this site you agree to us using cookies as described in. Double Kelvin waves over the Newfoundland shelf‐break by a linear combination of the first mode continental shelf wave and the double Kelvin wave.

eddy structures and wave propagation. For a broad shelf (distant coast), with the continental slope regarded as a scarp, again only waves in σ straight shelf. An exception is the lowest mode, a ‘double’ Kelvin wave decaying to both sides.

A seamount is again similar but introduces the same quantization as an island. The continental shelf can act as a waveguide for the propagation of subinertial fluctuations of sea level and currents (e.g., Allen ; Mysak ; Brink ).Basically, these oscillations arise as a consequence of the conservation of potential vorticity, and the phase always propagates with the coast to the right (left) on the Northern (Southern) Hemisphere (Longuet-Higgins Author: Magnus Drivdal, Jan Erik H.

Weber, Jens Boldingh Debernard. The wave orbital velocities, which vary from 0 to m s⁻¹, are capable of mobilizing sediment across almost the entire continental shelf area, since the critical bottom sediment velocity.

Propagation of swell across a wide continental shelf T. Herbers and E. Hendrickson Department of Oceanography, Naval Postgraduate School, Monterey, California W. O'Reilly Center for Coastal Studies, Scripps Institution of Oceanography, La Jolla, California by:   The characteristics of continental shelf waves forced by nonlinear continental shelf topography are studied with a shallow-water model.

Results show that t The northward propagating topographic Rossby wave couples with the inertia gravity wave into an unstable wave in the long wave by: 1. during March–September on the continental shelf and slope off Bhatkal, Goa, and Jaigarh on the central west coast of India to present evidence for poleward propagation of shelf or coastal-trapped waves (CTWs).

Wave propagation is seen on the shelf in the 20–day, 10–day, and 3–5-day-period bands. The lag from south to north indicatesCited by:   A storm crossing a step shelf can result in the excitation of an infinite set of edge waves, a single KW, a unique DKW and a first-mode continental shelf wave, depending on the topography and the disturbance time scale, translation speed and incident by: Mid-frequency (1–10kHz) sound propagation was measured at ranges 1–9km in shallow water in order to investigate intensity statistics.

Warm water near the bottom results in a sound speed minimum. En Cited by: 2. Continental shelf. Three groups of species assemblages were found: F, E, and G (Table and Fig. ).Species assemblage F was mainly defined by the polychaetes Paradiopatra calliopae, Galathowenia oculata, and Terebellides species in this assemblage were the polychaetes Prionospio ehlersi, Auchenoplax crinita, Kirkegaardia dorsobranchialis, Spiophanes kroyeri, and Author: Ibon Galparsoro, Iñigo Muxika, Joxe Mikel Garmendia, José Germán Rodríguez.

The transformation of long waves—such as tsunamis and storm surges—evolving over a continental shelf is investigated.

We approach this problem numerically using a pseudo-spectral method for a higher-order Euler formulation. Solitary waves and undular bores are considered as models for the long waves. The bathymetry possesses a periodic ridge-valley configuration in the alongshore direction.

Grimshaw, R., b. “The stability of continental shelf waves I. Side band instability and long wave resonance”, School of Mathematical Sciences Research Report No.

Author: R. Grimshaw. Underwater sound propagation in continental shelf regions is influenced by many physical oceanographic and geological features. With a data‐assimilated ocean model, the physical oceanographic (PO) influences can be taken into account in a sound propagation model.

This talk presents an integrated modeling framework with the regional ocean modeling system (ROMS) and Author: Ying‐Tsong Lin, Weifeng Gordon Zhang, Timothy F.

Duda, James F. Lynch, Arthur E. Newhall. continental-shelf waves Vorticity waves produced in a continental-shelf area where there is a sea-bed slope. In the northern hemisphere, if a water column is displaced into shallower water it develops negative relative vorticity, or anticyclonic motion; if displaced into deeper water it will develop positive relative vorticity, or cyclonic motion.

Thiebaut and Vennell's 7 analysis of tide-gauge data obtained a phase speed of 16 m/s for a free continental shelf wave propagating from the Newfoundland Shelf to the Scotian by: continental shelf.

Typically they are produced by the inflow from a coastal buoyancy source, such as a river or estuary. After entering the shelf regime, they usually turn anticyclonically toward the direction of coastally trapped wave propagation (‘‘downshelf’’ in the.

Given a typical drag coefficient for wind stress over the sea and for currents above the sea bed, these Ekman transports are about [math]1 \; m^2/s[/math] for a typical wind of 8 m/s or near-bed current m/s.

For example, modelled mean down-welling circulation for the north-west European shelf from Brittany to the Norwegian Trench was about Sv (figure 7) as a. at the edge of a continental shelf) Weifeng (Gordon) Zhang book of Mauray(The Physical Geography of the Sea and Its curved internal wave duct.

Inhomogeneous sound propagation caused by the horizontal temperature variation associated with the solitary internal wave. Sound Propagation through the Stochastic Ocean provides a comprehensive treatment of developments in the field of statistical ocean acoustics over the last 35 years.

This will be of fundamental interest to oceanographers, marine biologists, geophysicists, engineers, applied mathematicians, and physicists. Structure. A continental shelf typically extends from the coast to depths of – metres (– feet).

It is gently inclined seaward at an average slope of about °. In nearly all instances, it ends at its seaward edge with an abrupt drop called the shelf this lies the continental slope, a much steeper zone that usually merges with a section of the ocean floor called.Unfortunately, this book can't be printed from the OpenBook.

If you need to print pages from this book, we recommend downloading it as a PDF. Visit to get more information about this book, to buy it in print, or to download it as a free PDF.

Below is the uncorrected machine-read text.the continental shelf geometry and bathymetry. Thus, any storm simulation should include a domain large enough to contain the meteorological forcing fields and remote effects through coastally trapped wave propagation.

The current model domain covers the southern Labrador Shelf .