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Arctica, or Arctida [1] is a hypothetical ancient continent which formed approximately 2.565 billion years ago in the Neoarchean era. It was made of Archaean cratons , including the Siberian Craton , with its Anabar / Aldan shields in Siberia , [ 2 ] and the Slave , Wyoming , Superior , and North Atlantic cratons in North America. [ 3 ]
The Arctic Circle is one of the two polar circles, and the most northerly of the five major circles of latitude as shown on maps of Earth at about 66° 34' N. [1] Its southern equivalent is the Antarctic Circle. The Arctic Circle marks the southernmost latitude at which, on the winter solstice (which is the shortest day of the year) in the ...
Arctic. The Arctic Circle, currently at roughly 66° north of the Equator, defines the boundary of the Arctic seas and lands. A political map showing land ownership within the Arctic region. Artificially coloured topographical map of the Arctic region. MODIS image of the Arctic. The Arctic (/ ˈɑːrtɪk / or / ˈɑːrktɪk /) [1][Note 1] is a ...
The Arctic Ocean is the smallest and shallowest of the world's five oceanic divisions. [ 1 ] It spans an area of approximately 14,060,000 km 2 (5,430,000 sq mi) and is the coldest of the world's oceans. The International Hydrographic Organization (IHO) recognizes it as an ocean, although some oceanographers call it the Arctic Mediterranean Sea ...
Appearance. hide. A map of the Arctic. The red line is the 10 °C isotherm in July, commonly used to define the Arctic region; also shown is the Arctic Circle. The white area shows the average minimum extent of sea ice in summer as of 1975. [ 1 ] The climate of the Arctic is characterized by long, cold winters and short, cool summers.
Arctic Archipelago. The Arctic Archipelago, also known as the Canadian Arctic Archipelago, is an archipelago lying to the north of the Canadian continental mainland, excluding Greenland (an autonomous territory of Denmark) and Iceland (an independent country). Situated in the northern extremity of North America and covering about 1,424,500 km 2 ...
Map of part of Kennedy Channel, with the formerly disputed island. Hans Island is situated in the Nares Strait, a waterway that runs between Ellesmere Island (the northernmost part of Nunavut, Canada) and Greenland. The small uninhabited island, sized 1.3 km 2 (0.5 sq mi), was named for Greenlandic Arctic traveller Hans Hendrik.
The North American Arctic is on the left. The North American Arctic is composed of the northern polar regions of Alaska (USA), Northern Canada and Greenland. [ 1 ] Major bodies of water include the Arctic Ocean, Hudson Bay, the Gulf of Alaska and North Atlantic Ocean. [ 2 ] The North American Arctic lies above the Arctic Circle. [ 3 ]