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Wednesday, July 8, 2020 | History

2 edition of Geophysical studies of the Chukchi cap, Arctic Ocean found in the catalog.

Geophysical studies of the Chukchi cap, Arctic Ocean

Kenneth Leland Hunkins

Geophysical studies of the Chukchi cap, Arctic Ocean

by Kenneth Leland Hunkins

  • 253 Want to read
  • 6 Currently reading

Published in Chicago .
Written in English

    Subjects:
  • Geophysics -- Chukchi Sea,
  • Chukchi Sea

  • Classifications
    LC ClassificationsGC401 H8
    The Physical Object
    Pagination235-247 p.
    Number of Pages247
    ID Numbers
    Open LibraryOL14326575M

    ARCTIC GEOPHYSICS During the summer of , T-3 crossed the Chukchi Cap, a marginal plateau about km. in topography of this feature (Fig. 3) was further explored and the large magnetic anomaly on its western flank was delineated more. to the suggestion that the Chukchi Borderland rifted away from the eastern Canadian arctic margin and through various strike-slip movements and rotations, was eventually brought to its present position (e.g. fig. 3, Grantz et al., ). In the summer of , USCG Icebreaker Healy crossed the Arctic Ocean .

    salinity difference between the fresher North Pacific Ocean and the saltier Arctic Ocean, which gives rise to a steric height difference of m, translating to a sea level slope of 10 6 [Stigebrandt, ]. The annual mean transport is believed to be in the – Sv range [Coachman and Aagaard, , ; Aagaard et al., ]. More recent. about m in most of the deep water portion of the Arctic Ocean, from m in { to m in the s. The decrease is greater in the central and eastern Arctic than in the Beaufort and Chukchi seas. Preliminary evidence is that the ice cover has continued to become thinner in some regions during the s. Introduction.

    neck studies, the diurnal tide in the Arctic Ocean had the form of progressive wave with one amphidrome at the southern edge of Spitsbergen. Their most impor- tant conclusion was that the diurnal tides in the Arc- tic Ocean, in contrast to semidiurnal tides, are caused almost entirely through the influence of astronomical forcing. These works later became a reference point for interpretation of geophysical surveys in the Arctic. After NIIGA transformation into the All-Russian Research Institute of Geology and Mineral Resources of the World Ocean (VNIIOkeangeologia), the geology of World Ocean seafloor became, and still is, the subject of Alexey L. Piskarev’s studies.


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Geophysical studies of the Chukchi cap, Arctic Ocean by Kenneth Leland Hunkins Download PDF EPUB FB2

GEOPHYSICAL STUDIES OF THE CHUKCHI CAP, ARCTIC OCEAN [Hunkins, Kenneth, et al] on *FREE* shipping on qualifying offers. GEOPHYSICAL STUDIES OF THE CHUKCHI CAP, ARCTIC OCEANAuthor: et al Hunkins, Kenneth.

Abstract Echo‐sounding, seismic‐reflection, and magnetic measurements were made across the Chukchi cap in the Arctic Ocean from drifting station Charlie in The Chukchi cap is km wide at the line of crossing and its minimum depth is meters. A microrelief of 5 to 30 meters on the top is attributed to gouging by by: Arctic Ocean geophysical studies: Chukchi Cap and Chukchi Abyssal Plain DEPTH SOUNDINGS A total of spot echo soundings were made between May 12 and Septem The soundings were taken from the pack ice off the edge of T Explosives ranging from detonator caps to 1 lb.

charges were used as sound by: The research paper, “Rapid dynamic activation of a marine-based Arctic ice cap”, was published online by Geophysical Research Letters as an Early Access article on 23 December See here for more information about CPOM at the University of Leeds.

Location of the Chukchi Plateau in the Arctic Ocean The Chukchi Plateau or Chukchi Cap is a large subsea formation extending north from the Alaskan margin into the Arctic Ocean. The ridge is normally covered by ice year-round, and reaches an approximate bathymetric prominence of 3, m with its highest point Geophysical studies of the Chukchi cap m below sea level.

A bathymetric chart of the Chukchi Cap region was compiled with soundings obtained from Fletcher's Ice Island (T-3), as well as from other ice stations and from U.S. Navy icebreakers. New details of the Chukchi Cap are shown, including two submarine troughs on the southwest side.

Geophysical studies of the Chukchi cap the Chukchi and global RSL curves, we suggest that the Arctic Ocean was an isolated basin from the Eocene/Oligocene boundary to the opening of the Fram Strait in the early Miocene.

The opening of the Fram Strait might have caused significant fresh water input into the North Atlantic Ocean and a consequent rise in the global RSL. [1] We present an analysis of Arctic Ocean hydrographic and sea ice observations from the s, with a focus on the circulation of water that originates in the North Pacific Ocean.

Previous studies have shown the presence of two varieties of relatively warm “summer halocline water” in the vicinity of the Chukchi Sea, i.e., the relatively fresh Alaskan Coastal Water (ACW) and the.

Abstract The projected changes and trends in the regional annual and monthly maxima of the significant wave height (Hs) in the Arctic Ocean are studied using wave simulations derived from the CMIP5. It supplies the western Arctic Ocean with acidifying water.

Our study reveals a redistribution of PWW associated with the wind‐driven spin‐up of Beaufort Gyre. The lateral advection of PWW from the Chukchi Borderland to the northern Canada Basin plays an important role in the deepening of PWW lower bound at the edge of Beaufort Gyre.

The Arctic Ocean occupies a roughly circular basin and covers an area of ab, km 2 (5, sq mi), almost the size of Antarctica. The coastline is 45, km (28, mi) long. It is the only ocean smaller than Russia, which has a land area of 16, km 2 (6, sq mi). It is surrounded by the land masses of Eurasia, North America, Greenland, and by several islands.

Geophysical and Oceanographic Research in the Arctic Ocean. Lamont-Doherty Geological Observatory, Columbia University. Lamont-Doherty Geological Observatory, Columbia University. Final Report AF 19 () –, ASTIR   Geology and physiography of the continental margin north of Alaska and implications for the origin of the Canada Basin.

In: A.E.M. Nairn, M. Churkin Jr. and F.S. Stehli (Editors), The Ocean Basins and Margins. (The Arctic Ocean, 5.) pp Hall, J.K., Arctic Ocean geophysical studies: The Alpha Cordillera and Mendeleyev Ridge.

In the initial study of the Chukchi Borderland, Polyak et al. () inferred ice expanding from the Chukchi Shelf, but in later studies glacigenic bedforms in this area have been related to ice impinging only from the Laurentide ice sheet, with possibly local small ice cap(s) on the Chukchi Plateau (Jakobsson et al.,Jakobsson et al.

Since the s, the biggest waves in the Beaufort, Chukchi and Bering Seas have grown at a rate of to percent per year, according to a comprehensive study led. The Chukchi Plateau can be described as a fragment of the continental margin jutted into the abyssal part of the Arctic Ocean.

The Chukchi Plateau has the most direct connection with the adjacent. Arctic Ocean geophysical studies: Chukchi Cap and Chukchi Abyssal Plain. Deep-Sea Res. – Google Scholar. Sykes, L. The seismicity of the Arctic. Seismo-logical Soc. Amer. Bull. – Google Scholar. Treshnikov, A. The Arctic discloses its secrets: new data on the bottom topography and waters of the Arctic.

across the transition between the Chukchi Shelf and Chukchi Borderland in the Arctic Ocean from Sep. 6 – Oct. 9, (Fig. The seismic data will allow us to investigate sedimentary and structural feature. Specific aims of this project are: (1) to analyze the main sedimentary processes in the Chukchi Borderland and Chukchi Shelf, (2) to.

The present Arctic Ocean circulation involves net inflow of Atlantic water with about 1– Sv (1 SV = 10 6 m 3 s −1) through the Fram Strait and >2 Sv via the Barents Sea (Maslowski et al.,Rudels, ).These two flow paths merge off the St Anna Trough to form a cyclonic circulation along the slopes of the Arctic continental margins ().

Approximately km of low-level ( m) aeromagnetic tracks were flown over the Arctic Ocean and adjacent Greenland and Norwegian Seas, for the greater part with a digitally recording nuclear precession magnetometer designed and built by Wold (). The digital recording feature of the system facilitated numerous data processing and analytical techniques which are described herein.

The Arctic Ocean is an isolated mediterranean basin with only limited communication with the world’s oceans, principally the Atlantic Ocean via the Fram Strait and the Barents Sea, and the Pacific Ocean via the Bering Strait.

The ubiquitous feature of the Arctic Ocean is the sea ice that covers the entire Arctic basin during the winter months and only retreats off the shallow water shelf.SCICEX is a federal interagency collaboration among the operational Navy, research agencies, and the marine research community to use nuclear-powered submarines for scientific studies of the Arctic Ocean.MATERIALS AND METHODS A.

Data collection The study was conducted in the western Arctic Ocean while Healy was mapping the seafloor north of the Chukchi Cap (Fig. 1). Typical water depths were between 3 and 4km over the “foot” of the continental slope—the area where the continental margin transitions into the deep seafloor.