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Thursday, October 15, 2020 | History

2 edition of Dynamics of iceberg grounding and scouring found in the catalog.

Dynamics of iceberg grounding and scouring

Environmental Studies Research Funds (Canada)

Dynamics of iceberg grounding and scouring

by Environmental Studies Research Funds (Canada)

  • 101 Want to read
  • 35 Currently reading

Published by s.n in S.l .
Written in English


Edition Notes

1

SeriesEnvironmental Studies Research Funds (Canada). Report -- no. 094
ContributionsHodgson, G.J.
The Physical Object
Pagination2 vols.
ID Numbers
Open LibraryOL21678504M

Understanding the link between sea ice, ice scour and Antarctic benthic biodiversity–the need for cross-station and international collaboration - Volume 53 Issue 2 - D. Deregibus, M.L. Quartino, K. Zacher, G.L. Campana, D.K.A. Barnes. Part of the Springer Geology book series (SPRINGERGEOL) Möller P () Marginal formation of De Geer moraines and their implications to the dynamics of grounding-line recession. J Quat Sci 20 () The physical processes of seabed disturbance during iceberg grounding and scouring. Cont Shelf Res – CrossRef Google Scholar.

  Antarctic marine life is coming under increasing threat from icebergs that are scouring the seabed and destroying their habitat, a new study by the British Antarctic Survey has found. A simple model of the dynamics shows that the ratio between the geostrophic and the tidal current velocities can be used to determine the geometry of the iceberg trajectories (Fig. 5a). When the ratio is greater than unity, the icebergs tend to move in spiral drift tracks, as shown by scour 2 (Fig. 3).

  Most studies on the Antarctic benthos in a changing climate are in response to glacier, sea ice, anchor ice retreat, increased iceberg scouring and .   At a local scale (1 to m), undisturbed glass sponge-associated habitats were significantly more diverse than disturbed ones; at a regional scale (1 to km), increased habitat heterogeneity caused by iceberg scouring enhanced species diversity. The pace and succession of the recolonization exhibits high variability and is difficult to.


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Dynamics of iceberg grounding and scouring by Environmental Studies Research Funds (Canada) Download PDF EPUB FB2

Get this from a library. The dynamics of iceberg grounding and scouring (digs) experiment and repetitive mapping fo the Eastern Canadian continental shelf. [Canada. National Energy Board. Environmental Studies Research Funds.;]. The item The dynamics of iceberg grounding and scouring (DIGS) experiment and repetitive mapping of the Eastern Canadian continental shelf, editors, G.J.

Hodgson [et al.] ; scientific advisers, C.F.M. Lewis and D.R. Parrott represents Dynamics of iceberg grounding and scouring book specific, individual, material embodiment of a distinct intellectual or artistic creation found in University of Manitoba Libraries.

Retreat of the palaeo‐ice stream from the continental shelf break was characterized by ice‐margin break‐up via large calving events, evidenced by intensive iceberg scouring on the outer shelf. The retreating ice margin stabilized in outer‐Storfjordrenna, where the southern tip of Spitsbergen and underlying bedrock ridges provide lateral Cited by: 1.

The iceberg-soil interaction model discussed here allows for various iceberg geometries. As a basis for possible iceberg geometries, data is used from the Dynamics of Iceberg Grounding and Scouring (DIGS) field experiments performed in the Eastern Canadian Continental Shelf, POAC Labrador, in August (Hodgson et al., ).

Main Dynamics [9] The basic equation describing the horizontal motion of an iceberg of mass M is M d~u dt ¼~F A þ~FW þ~FC þ~FSS þ~FSI; ð1Þ where~u is the iceberg velocity.

The atmospheric force (~F A T^) and ocean force (~F W) act on the cross‐sectional area above (below) the water line in a vertical plane (form drag) and aCited by:   1. Introduction [2] Icebergs in the Barents Sea present a threat for navigation and offshore installations.

The threat could be in a direct form through a collision or via scouring of the ocean floor from grounded icebergs. [3] The main source of icebergs in the Barents Sea is the Svalbard Archipelago and especially the Austfonna ice cap [Dowdeswell et al., ].

Email your librarian or administrator to recommend adding this book to your organisation's collection. Icebergs. Grant R. Bigg; Online ISBN: The physical processes of seabed disturbance during iceberg grounding and scouring. Cont. Iceberg dynamics of the DIGS Experiment.

In: Ice scour and seabed engineering, ed. Lewis, C. DIGS was a multi-disciplinary study designed to make detailed observations and measurements of the iceberg grounding and scouring phenomenon ranging from the dynamic behaviour of free- floating and seabed-touching icebergs to descriptions and measurements of iceberg- deformed seabed sediment.

Here we present a two-dimensional, Full-Stokes (FS) modeling study of the grounding line dynamics and iceberg calving of TG.

First, we compare FS with two simplified models, the higher-order (HO) model and the shallow-shelf approximation (SSA) model, to determine the impact of changes in ice shelf basal melt rate on grounding line dynamics.

Iceberg Theory of Leadership & Teamwork • Leadership & Teamwork can be thought of as analogous to an iceberg. • There is a part that is observable above the surface. • And there is usually a of the “Group Dynamics” sessions. is to explore a number of concepts. The Dynamics of Iceberg Grounding and Scouring (DIGS) experiment was conducted in the Labrador Sea during August The objectives of the experiment were to obtain full-scale data sets documenting iceberg/seabed interactions, and to obtain by direct observation new information regarding the processes of iceberg scour formation and degradation.

This program was called the Dynamics of Ice- berg Grounding and Scouring (DIGS) experiment (Hodgson et al., in press). A number of icebergs in the DIGS study were fitted with motion sensing de- vices. Furthermore, the chosen icebergs were "mapped" in order that their geometric character- istics could be analysed at a later date.

intermediate- and low-intensity iceberg scouring. Characterising the effects of iceberg scour in diamicton is important more widely to inform: i) reconstruction of the geometry and dynamics of former ice sheets; and ii) installation and protection of offshore engineering structures in diamicton where iceberg scouring presents a geohazard.

A floating ice shelf would also extend the calving margin well away from the grounding‐line, preserving the surface of the GZD from iceberg scouring. It is difficult to determine whether the ice margin had a substantial floating ice shelf, although GZW build‐ups at other reconstructed ice margins are associated with a sub‐shelf cavity.

Retreat of the palaeo‐ice stream from the continental shelf break was characterized by ice‐margin break‐up via large calving events, evidenced by intensive iceberg scouring on the outer shelf.

The retreating ice margin stabilized in outer‐Storfjordrenna, where the southern tip of Spitsbergen and underlying bedrock ridges provide lateral. The dynamics of iceberg grounding and scouring (DIGS) experiment and the repetitive mapping of the eastern Canadian continental shelf.

Environmental Studies Research Funds Report No. Google Scholar Josenhans, H.W. and Barrie, J.V., Submersible observations on. Engineering Mechanics PDF Download.

Download free ebook of Engineering Mechanics in PDF format or read online by I. Jong,B. Rogers Published on by Oxford University Press. Jong and Rogers have written an in depth text covering various topics of the first courses in statics and dynamics offered in the sophmore and junior year of engineering colleges.

Dynamics of Iceberg Grounding and Scouring: Observations of Iceberg Scour Marks by Manned Submersible Arctic Land-Sea Interaction, Nov. Bedford. The Dynamics of Iceberg Grounding and Scouring (DIGS) experiment was conducted in the Labrador Sea during August The objectives of the experiment were to obtain full-scale data sets.

Iceberg grounding and scouring on the Labrador continental shelf. Iceberg grounding event at the Whiterose wellsite, (). Iceberg marks on the Labrador Shelf. Iceberg motion: an analysis of two data sets collected at drill sites in the Labrador Sea.

Marine ice-cliff instability (MICI) processes could accelerate future retreat of the Antarctic Ice Sheet if ice shelves that buttress grounding lines more than metres below se.Iceberg, floating mass of freshwater ice that has broken from the seaward end of either a glacier or an ice shelf.

Icebergs are found in the oceans surrounding Antarctica, in the seas of the Arctic and subarctic, in Arctic fjords, and in lakes fed by glaciers. Icebergs of the Antarctic calve from.Seabed gouging by ice is a process that occurs when floating ice features (typically icebergs and sea ice ridges) drift into shallower areas and their keel comes into contact with the seabed.

As they keep drifting, they produce long, narrow furrows most often called gouges, or scours. This phenomenon is common in offshore environments where ice is known to exist.