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1 edition of Anomalous diurnal currents in the vicinity of the Yermak Plateau found in the catalog.

Anomalous diurnal currents in the vicinity of the Yermak Plateau

Christophe Prazuck

Anomalous diurnal currents in the vicinity of the Yermak Plateau

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Published by Naval Postgraduate School, Available from the National Technical Information Service in Monterey, Calif, Springfield, Va .
Written in English


About the Edition

Unexpectedly strong diurnal tidal currents, in a region dominated by semi-diurnal tidal surface displacements, were observed in the ARCTEMIZ 86 and 87 and CEAREX 89 records of buoy drift over the Yermak Plateau, submarine feature north of Svalbard. Similar diurnal currents were observed during the FRAM III, FRAM IV experiments. Data Analysis of the positions of the thirty satellite-tracked drifting buoys provides a description of the diurnal current field with good spatial coverage. This statistical description shows that tidal diurnal currents are enhanced over the entire plateau region. However, specific smaller regions above the plateau (order of 90 km) exhibit locally an even stronger and highly polarized response to the tide that has not been explained until now. Firstly, a simple analytic model is used to show that the variation in the steepness of the slopes of the plateau could be responsible for significant spatial variations in the diurnal current field. Secondly, a numerical model shows that the variation in the curvature of the plateau is also important. Furthermore, the numerical model shows that the curvature of the topography causes the Yermak Plateau to act like a filter, responding resonantly to forcing with periods ranging from approximately 20 to 35 hours.

Edition Notes

ContributionsGarwood, Roland W.
The Physical Object
Pagination125 p. ;
Number of Pages125
ID Numbers
Open LibraryOL25495350M

An oceanic or submarine plateau is a large, relatively flat elevation that is higher than the surrounding relief with one or more relatively steep sides.. There are oceanic plateaus covering an area of 18,, km 2 (7,, sq mi), or about % of the oceans. The South Pacific region around Australia and New Zealand contains the greatest number of oceanic plateaus (see map).   A comparison of USCRN and USHCN V2 (current) and then what the USHCN reported temperature was in October (I’ve been saving the numbers since this time). I’ve also recalculated the October USHCN temperature anomalies using the current base period and surprise, to use to be warmer. These currents are known to have diurnal characteristics, that is, Part two of builder Edward Leedskalnin own magnetic current book The Giza plateau is the intersection of two major limestone layers: the Mokkatam and the Maadi. The pyramids were placed in a line where multiple aquifer layers surface, on an interfluve.


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Anomalous diurnal currents in the vicinity of the Yermak Plateau by Christophe Prazuck Download PDF EPUB FB2

Unexpectedlystrongdiurnal tidal currents, in aregion dominatedby semi-diurnal tidal surface displacements, were observed in the ARCTEMIZ 86 and 87 and CEAREX 89 recordsof buoy drift over the Yermak Plateau,a submarine feature north rdiurnal currents were.

Anomalous Diurnal Currents in the Vicinity of the Yermak Plateau Unexpectedly strong diurnal tidal currents, in a region dominated by semi-diurnal tidal surface displacements, were observed in the ARCTEMIZ 86 and 87 and CEAREX 89 records of buoy drift over the Yermak Plateau, submarine feature north of by: 3.

Furthermore, the numerical model shows that the curvature of the topography causes the Yermak Plateau to act like a filter, responding resonantly to forcing with periods ranging from approximately 20 to 35 hoursUnexpected strong diurnal tidal currents, in a region dominated by semi-diurnal tidal surface displacements, were observed in the ARCTEMIZ 86 and 87 and CEAREX 89 records of buoy drift Author: Christophe Prazuck.

Recent current measurements obtained from drifting platforms over the Yermak Plateau in the eastern Arctic Ocean confirm that the plateau Anomalous diurnal currents in the vicinity of the Yermak Plateau book a region of greatly enhanced diurnal tidal currents.

Anomalous diurnal currents in the vicinity of the Yermak Plateau book space is required for the Yermak Plateau at anomaly 24 because it is composed of oceanic and thinned continental crust.

The development of the Yermak Plateau and the Morris Jesup Rise, paired aseismic ridges, took place when the North American, Eurasian, and. Download Citation | Internal tide on the Ermak Plateau in the Arctic Ocean | Data on current velocity in the upper oceanic layer are analyzed.

The data were obtained on the Yermark Plateau at a. The selective interaction of diurnal and semidiurnal tides with a seamount is exhibited over Kashevarov Bank. There are no large peculiarities in the cotidal charts of the semidiurnal tides there (Figs. 4 and 5).Increase in the semidiurnal tidal currents is relatively small when compared to the diurnal currents ().A special behavior of the diurnal tides around Kashevarov Bank is easily Cited by: Recent observations made over the Yermak Plateau, a × km submarine feature northwest of Svalbard, show that ocean currents in that area are dominated by diurnal tidal currents although.

Another important region of tidal mixing effects is the Yermak Plateau north of Svalbard, where internal tides of diurnal, semidiurnal, and quarter‐diurnal periods have been observed [Padman and Dillon,; Fer et al., ].

Our model does produce strong shear in this region, which cannot be explained by internal tides. Summary. The separation of Northeast Greenland and Svalbard is the result of large-scale strike slip movements during Cenozoic times.

Geological evidence for these movements can be found onshore both on North Greenland and Svalbard. However, the role of the submarine Yermak Plateau (YP) in this process is by: Poecentmeasurementsand tidal current analysis over the Yermak Plateau have been summarizedby andSmith[]on the Oregonshelf clearlyshow and Cartwright[]off the west coastof Scotland Padmanet al.

[].Their measurements found that in the field of velocity the reverse situation can occur, i.e., diurnal tidal currentscan dominate over semidiurnal currents. Anomalous diurnal currents in the vicinity of the Yermak Plateau book So far vorticity waves have only been convincingly identified only in Lake Michigan.

Here we examine some elementary models of vorticity waves in channels and rectangular basins. Anomalous diurnal currents in the vicinity of the Yermak Plateau book characteristics of vorticity waves in these idealized models are discussed to provide guidance for a search in Lake Champlain for these : Kenneth Hunkins.

The selective interaction of diurnal and semidiurnal tides with a seamount is exhibited over Kashevarov Bank. There are no large peculiarities in the cotidal charts of the semidiurnal tides there (Figs.

4 and 5).Increase in the semidiurnal tidal currents is relatively small when compared to the diurnal currents ().A special behavior of the diurnal tides around Kashevarov Bank is easily.

As a result of intense scientific and economic interest, the North Atlantic Igneous Province is the most thoroughly documented LIPs on Earth. From current observations, a regional picture emerges of widespread early Paleogene magmatism extending from the Charlie Gibbs fracture zone in the south to the Senja Fracture Zone in the north on the eastern side of the North Atlantic.

Observations were made of oceanic currents, hydrography, and microstructure in the southern Yermak Plateau in summer The location is in the marginal ice zone at the Arctic Front northwest of Svalbard, where the West Spitsbergen Current (WSC) carries the warm Atlantic Water into the Arctic by: Measurements of diurnal tides over the continental slope between the Norwegian Sea and the Barents Sea shelf are presented.

Numerical 3D simulations, in agreement with field data, show strong cross-slope velocities and large vertical displacements of the interface Cited by: Temperature, salinity and currents were measured in the Yermak Plateau and northern Fram Strait region during March–April An isothermal upper layer Cited by:   The model suggests that the importance of the Yermak Pass Branch as a pathway of AW is modulated from one year to the other.

5 Summary and Discussion. We analyzed 14 months (July to September ) of ADCP data in the Yermak Pass at °N, °E on the m isobath, a location covered by sea ice 10 months out of Cited by: Anomalous diurnal currents in the vicinity of the Yermak Plateau by Christophe Prazuck Lieutenant Commander, French Navy Ing6nieur de l'Ecole Navale, Submitted in partial fulfillment of the requirements for the degree of DOCTOR OF PHILOSOPHY IN PHYSICAL OCEANOGRAPHY from the NAVAL POSTGRADUATE SCHOOL June Author.{, Christoph razuckCited by: 3.

Figure 9 displays the simulated day mean wind and the diurnal evolution of anomalous wind at 10 m above ground level (AGL). The mean wind field shows a cyclonic circulation dominating SC and the northern area of the SCS (Figure 9a).

The anomalous wind field presents a clear diurnal by: 5. Fram Strait is the broad and deep gap (width, km; sill depth, m) separating Greenland and Spitsbergen.

There is an exchange through it of cold, fresh Arctic waters and warm, saline Atlantic Cited by: 8. In the Arctic, strong diurnal currents have been recorded in the eastern Arctic, in the western Barents Sea (Kowalik ) and over the Yermak Plateau, northwest of Svalbard (Padman et al.

It is the existence of these TVWs that causes strong tidal currents in polar areas to commonly be diurnal in nature rather than semidiurnal, the tidal. The ocean provides critical services to life on the planet, absorbing 93% of the heat from anthropogenic warming and a quarter of human carbon dioxide (CO 2) emissions each r, rising ocean temperatures and CO 2 levels also change the marine environment: pH and oxygen levels fall, ocean currents change, and nutrient fluxes and concentrations are shifting, all with large effects on.

Measurements of mean flow and turbulence in the boundary layer under drifting Arctic pack ice during the CEAREX O Camp experiment support the hyp Cited by: 1. 1 Alford, M. H., Cronin, M. F., and Klymak, J. M.: Annual cycle and depth penetration of wind-generated near-inertial internal waves at Ocean Station Papa in the.

Full text of "American Journal Of Ophthalmology(35)" See other formats. Variability in Atlantic water temperature and transport at the entrance to the Arctic Ocean, – – ICES Journal of Marine Science, – The variability in Atlantic water temperature and volume transport in the West Spitsbergen Current (WSC), based on measurements by an array of moorings in Fram Strait (78°50′N) over the Cited by: (3) Christopher Prazuck, Anomalous diurnal currents in the vicinity of the Yermak Plateau, Ph.D dissertation in Physical Oceanography, June (2) Peter Guest, A numerical, analytical and observational study of the effect of clouds on surface wind and wind stress during the central Arctic winter, Ph.D dissertation in Meteorology, March You can write a book review and share your experiences.

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The upper layer west of the Yermak Plateau was cold, deep and comparably saline, similar to what has recently been observed in the interior Eurasian Basin. Closer to the Greenland continental slope the salinity of the upper layer became much lower, and the temperature maximum of the Atlantic Layer was occasionally below °C, indicating.

`Anomalous dimensions’ for conserved currents from holographic dilatonic models to superconductivity Thanks to: NSF, EFRC (DOE) Kridsangaphong Limtragool Gabriele La Nave.

Superconductivity ala Weinberg L = 1 2 Z d3 xF 2 + L m [r A, ˙ + A0] Ginzburg-Landau A. The topographic enhancement of the diurnal tide near the Yermak Plateau has important consequences for the sea ice cover, hydrography, and general circulation of this region.

For example, the stress divergence applied by the tidal currents at the ice base greatly exceeds the typical divergence of the surface wind stress, and tides may therefore be important to local ice deformation.

We show theoretically and experimentally that lensless ghost imaging with thermal light is fully interpretable in terms of classical statistical optics. The disappearance of the ghost image when the object and the reference planes are located at different distances from the source is due to the fading out of the intensity-intensity cross correlation between the two planes.

This is a closed book exam. You may use two pages of notes, both sides blow from the Himalayan plateau towards the ocean during summer b) cause the western boundary current, the Somali Current, to reverse The semi-diurnal tide has high tide twice a day.

Why are these two high tides usually not the same height. That is, explain why there. Author interviews, book reviews, editors' picks, and more.

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Apple. Android. Windows Phone Author: B.J. O'Brien. Anomalous subsidence at around 10°N leads to a salient anticyclone to the southwest of the Philippines. Simulation of the diurnal cycle in tropical rainfall and circulation during Boreal summer with a high-resolution GCM.

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(2) The annual range diminishes with the elevation. (3) The diurnal range diminishes with the elevation. Comparisons are, however, apt to become anomalous when applied to elevated zones with a dense covering of forest and a great quantity of cloud and open and uncloudy regions both above and below the forest-clad tracts.

If you deform an ordinary material below its elastic limit and keep it below its annealing temperature, it will return to its original shape once the load is removed. If the stress is too large, however, or if the temperature is allowed to become too high, the deformation becomes permanent, and the material retains no memory of its original shape.

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