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Unusually, there is melting at the bottom of the NGRIP core – believed to be due to a high geothermal heat flux locally. This has the advantage that the bottom layers are less compressed by thinning than they would otherwise be: NGRIP annual layers at 10.5 kyr age are 1.1 cm thick, twice the GRIP thicknesses at equal age.
Constructed of wood, similar to fishing dories built in Atlantic Canada and New England, the iceboats were operated in the Northumberland Strait during the 19th century and early 20th century, running between Prince Edward Island and the mainland provinces of New Brunswick and Nova Scotia during the winter months between December and April when sea ice made passage by non-icebreaking steam ...
Healy traveled over 16,000 nmi (30,000 km; 18,000 mi), took over 25,000 water and ice samples from 72 science stations, and became the first unaccompanied U.S. surface vessel to reach the North Pole. She also engaged with the crew of the German icebreaker Polarstern while at the North Pole, in support of the international scientific mission ...
From September to November 1967, Northwind was beset by ice 450 miles (720 km) north-northwest of Point Barrow, Alaska. She was freed by CCGS John A. Macdonald, USCGC Glacier, and USCGC Staten Island. [1] During this cruise Northwind made the northernmost penetration into Arctic pack ice by any surface vessel in history at the time.
Aiviq is an American icebreaking anchor handling tug supply vessel (AHTS) built in 2012 to support oil exploration and drilling in the Chukchi Sea off Alaska.The vessel's primary task was towing and laying anchors for drilling rigs, and oil spill response.
In March and April 1968, [8] CAPT C. William Bailey, Commanding, Eastwind entered the Great Lakes to aid with icebreaking duties, during a particularly severe ice winter. Her deep polar draft became problematic in the shallow Great Lakes, which required carrying minimal fuel (to lessen draft) and frequent refueling.
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