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East Antarctica

geography Maturity 7-9 Next article →

East Antarctica, also known as Greater Antarctica, is a massive part of the Antarctic continent. It makes up two-thirds of the entire continent. Most of this region lies in the Eastern Hemisphere. It sits south of the Indian Ocean. The Transantarctic Mountains serve as a physical divider. These mountains separate East Antarctica from West Antarctica.

Antarctica
Antarctica

The geographic South Pole is located within this vast region. It is a place of extreme environments and immense scale.

The landscape is defined by its incredible elevation and temperature. East Antarctica is generally higher than West Antarctica. It is considered the coldest place on Earth. Most of the land is buried under thick, permanent ice. Beneath this ice lies the Gamburtsev Mountain Range. This subglacial range is about the size of the European Alps. Scientists believe these mountains were the nucleation site for the East Antarctic Ice Sheet. This means the mountains likely helped the ice sheet begin to form. This range sits near a location known as Dome A.

Topographic map of antarctica
Topographic map of antarctica

Many distinct coastal regions make up this large area. These include Coats Land and Queen Maud Land. Other named parts are Enderby Land and Kemp Land. You will also find Mac. Robertson Land and Princess Elizabeth Land. The region contains Wilhelm II Land and Queen Mary Land. It also includes Wilkes Land, Adélie Land, George V Land, Oates Land, and Victoria Land.

Map of Transantarctic Mountains
Map of Transantarctic Mountains

These various lands form a continuous, ice-covered expanse. Almost all of these areas are located in the Eastern Hemisphere.

The history of the name is quite long. The name has existed for more than 110 years. Early records include work by Balch in 1902 and Nordenskjöld in 1904. However, the name became much more common after the International Geophysical Year. This period of scientific study occurred between 1957 and 1958. During this time, explorations showed how the Transantarctic Mountains divide the continent. The name was officially approved in the United States in 1962. This approval came from the Advisory Committee on Antarctic Names, or US-ACAN.

Antarctica
Antarctica

Life in East Antarctica is limited by the harsh conditions. There are no trees or shrubs here. Very little land is free from ice. The small ice-free areas are called Antarctic oases. One example is the McMurdo Dry Valleys. These areas form a tundra-type region called Maudlandia Antarctic desert. In these spots, only specific life forms can survive. The flora consists of lichens, moss, and algae. These plants are adapted to the extreme cold and wind. They typically cling to rocks to stay secure.

Sea Ice and Icebergs off East Antarctica
Sea Ice and Icebergs off East Antarctica

While land life is sparse, the coasts are much more active. The surrounding ocean provides food for many animals. Various seabirds live along the coast. These include the southern fulmar and the southern giant petrel. You can also find the Cape petrel, snow petrel, and Wilson's storm-petrel. The large south polar skua and Antarctic petrel are also present.

Sea Ice and Icebergs off East Antarctica
Sea Ice and Icebergs off East Antarctica

Penguins are famous inhabitants, especially the emperor penguin. They breed during the cold, dark Antarctic winter. Various seals, known as Pinnipeds, also use the area. These include the leopard seal, Weddell seal, and the huge southern elephant seal. The crabeater seal and Ross seal also breed on the summer pack ice. Small animals like mites, springtails, midges, and nematodes live on the mosses.

Because it is so remote, East Antarctica remains largely untouched by humans. The Antarctic Treaty System provides vital protection for the region. This system bans industrial development and waste disposal. It also prohibits nuclear testing in the area. Some specific locations have even higher levels of protection. The Barwick Valley is one of the Dry Valleys that is specially protected. Mount Rittmann and Cryptogam Ridge on Mount Melbourne are also protected areas. These protections exist to keep the undisturbed plant life safe for the future.

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🖼️ Images & Media (4)
File:Antarctica.svg
Antarctica.svg
File:Sea Ice and Icebergs off East Antarctica.jpg
Sea Ice and Icebergs off East Antarctica.jpg
File:Map of Transantarctic Mountains.jpg
Map of Transantarctic Mountains.jpg
File:Topographic_map_of_antarctica.png
Topographic_map_of_antarctica.png
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