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In arctic or mountainous areas, the primary function of extreme cold weather clothing is to trap air as an insulator to prevent heat loss from the wearer's body. Secondary and necessary is to conduct water vapor away from the body to keep the insulating layers dry.
Polar lows can be difficult to detect using conventional weather reports and are a hazard to high-latitude operations, such as shipping and gas and oil platforms. Polar lows have been referred to by many other terms, such as polar mesoscale vortex, Arctic hurricane, Arctic low, and cold air depression. Today the term is usually reserved for the ...
The 2012-built South African polar research vessel S. A. Agulhas II is one of the few vessels rated PC 5 or higher.. Polar Class (PC) refers to the ice class assigned to a ship by a classification society based on the Unified Requirements for Polar Class Ships developed by the International Association of Classification Societies (IACS).
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The North American Arctic lies above the Arctic Circle. [3] It is part of the Arctic, which is the northernmost region on Earth. The western limit is the Seward Peninsula and the Bering Strait. The southern limit is the Arctic Circle latitude of 66° 33’N, which is the approximate limit of the midnight sun and the polar night. [4]
Most of northern Alaska has an Arctic climate with long, extremely cold winters and short, cool summers. The average temperatures during the summer months are only several degrees above freezing and the average temperatures during winter are as low as −20 to −30 °F (−29 to −34 °C), and can dip to −50 to −60 °F (−46 to −51 °C).
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