Antarctic ice sheet

The Antarctic ice sheet is one of the two polar ice caps of the Earth.

It covers about 98% of the Antarctic continent and is the largest single mass of ice on Earth. It covers an area of almost 14 million square kilometres (5.4 million square miles) and contains 26.5 million cubic kilometres (6,400,000 cubic miles) of ice. That is, approximately 61 percent of all fresh water on the Earth is held in the Antarctic ice sheet, an amount equivalent to about 58 m of sea-level rise. In East Antarctica, the ice sheet rests on a major land mass, but in West Antarctica the bed can extend to more than 2,500 m below sea level. Much of the land in this area would be seabed if the ice sheet were not there.

In contrast to the melting of the Arctic sea ice, sea ice around Antarctica was expanding as of 2013. The reasons for this are not fully understood, but suggestions include the climatic effects on ocean and atmospheric circulation of the ozone hole, and/or cooler ocean surface temperatures as the warming deep waters melt the ice shelves.

Antarctic

The Antarctic (US English /æntˈɑːrktɪk/, UK English /ænˈtɑːrktɪk/ or /æntˈɑːrtɪk/ and /ænˈtɑːrtɪk/ or /ænˈɑːrtɪk/) is a polar region, specifically the region around the Earth's South Pole, opposite the Arctic region around the North Pole. The Antarctic comprises the continent of Antarctica and the ice shelves, waters, and island territories in the Southern Ocean situated south of the Antarctic Convergence. The region covers some 20% of the Southern Hemisphere, of which 5.5% (14 million km²) is the surface area of the continent itself.

Geography

The maritime part of the region constitutes the area of application of the international Convention for the Conservation of Antarctic Marine Living Resources (CCAMLR), where for technical reasons the Convention uses an approximation of the Convergence line by means of a line joining specified points along parallels of latitude and meridians of longitude. The implementation of the Convention is managed through an international Commission headquartered in Hobart, Australia, by an efficient system of annual fishing quotas, licenses and international inspectors on the fishing vessels, as well as satellite surveillance.

Antarctic (ship)

Antarctic was a Swedish steamship built in Drammen, Norway in 1871. She was used on several research expeditions to the Arctic region and to Antarctica through 1898-1903. In 1895 the first confirmed landing on the mainland of Antarctica was made from this ship.

The ship

Antarctic was a barque with three masts and equipped with a steam engine. Build in 1871 at Holmen in Drammen under the name Cap Nor.

Initially Antarctic was used for seal hunting around Svalbard, Jan Mayen and Greenland, under that period the ship was captained by Gullik Jensen and among others Carsten Borchgrevink served on the ship.

In the early 1890s Norwegian ship-owner Svend Foyn wanted to expand his business to the Antarctic Ocean thereby needing capable ships. Foyn then purchased Cap Nor, made extensive repairs and after completion renamed the ship Antarctic. From 1893 the ship was deployed to the Antarctic ocean for whale hunting.

In 1897 the ship was purchased by Alfred Gabriel Nathorst for his planned expedition to Svalbard. Again extensive repairs were made prior to the expedition in 1898.