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- W2000772662 abstract "PREFACE The intent of this investigation was two folds first, to provide an operational, research platform in the Arctic for first class cadets (seniors) of the U. S. Coast Guard Academy to supplement their education in the engineering and ocean science fields, and second, to insure that the research be pertinent to the role of the USCG in the Arctic. As Radm. R. A. Richmond, USCG, stated, Our role has been and will continue to be to help with the research and analysis required to develop a sensible (transportation) system, and to make recommendations for sensible regulatory policies. Within these criteria the Coast Guard Academy has been involved in the Arctic every summer since 1969 in the following areas:West Greenland glacier survey,air cushion vehicle evaluation,oil spill effects on ice,ice thickness by shear wave techniques,ice scour on the northern continental shelf of Alaska andicebreaker instrumentation and ramming tests. BACKGROUND Ice islands became on interest in 1946 when three were sighted in the Arctic Basin. They were tracked by aerial observations until March, 1952, when the USAF landed a scientific party on one of the three, designated T-3. 2 Several investigators began efforts to determine the origin of these ice islands, and by 1960, it was pretty much accepted that they were calved from the Ellesmere Island ice shelf'. (With evidence that the Ellesmere Island ice shelf is waning in production, there is speculation that many of the Arctic ice islands are from Siberian ice shelves as yet unknown to Free World scientists.) Caught up in the Arctic Gyre, the ice islands drift southwest along the Canadian Archipelago and into the Beaufort Sea. The USN sponsored three oceanographic investigations into the Chukchi and Beaufort Seas and from these Carsola, in 1954, described a complicated system of bottom micro relief between depths of 30 and 200 fathoms. In water of less than 15 fathoms micro relief was noted on fathometer traces, but of a scale smaller than that in the deeper water. Without reaching any conclusions, Carsola offered five hypotheses as to the origin:glacial deposits,grounding of sea ice and icebergs,sea ice melt deposits,surface permafrost features andmass movement. In 1968, a large ice island grounded and broke up of Prudhoe Bay and scattered remnants over a distance of 100 miles along the 15 fathom curve. Most of these remnants were about 120 ft thick and had an average horizontal area of about 1 acre. Investigators found the underwater profile of one of these remnants to be undercut in places and protruding in others. Side slopes were generally less than 45°off the vertical." @default.
- W2000772662 created "2016-06-24" @default.
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- W2000772662 date "1973-04-28" @default.
- W2000772662 modified "2023-09-27" @default.
- W2000772662 title "Ice Scour on the Northern Continental Shelf of Alaska" @default.
- W2000772662 doi "https://doi.org/10.4043/1813-ms" @default.
- W2000772662 hasPublicationYear "1973" @default.
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