Antarctica

For legal purposes of the Antarctic Treaty, the arbitrary boundary of latitude 60° S is used, south of which lies the Antarctic Treaty Area. In addition, many tourists have visited Antarctica, which has underscored the value of scenic resources in the continent’s economic development. The treaty bound its members indefinitely, with a review of its provisions possible after 30 years. With the International Geophysical Year (IGY) in 1957–58, the present scale of scientific investigation of Antarctica began, and on December 1, 1959, the twelve countries prabhu 365 vip that were active in Antarctica during the IGY signed the Antarctic Treaty. Governments mandated many early expeditions—whether ostensibly economic, scientific, or exploratory in character—to make territorial claims.

Antarctica

• The continent is a cold dry desert where access to water determines the abundance of life.
• While many Antarctic species remain undiscovered, there are documented increases in Antarctic flora, and large fauna such as penguins are already having difficulty retaining suitable habitat.
• These ecosystems may harbor novel species that have remained concealed for centuries, sustained by nutrient-bearing ocean currents.
• Ice shelves, or ice sheets floating on the sea, cover many parts of the Ross and Weddell seas.

Climatologists track the history of Earth’s climate using ice cores from Antarctica’s pristine ice sheet. The number of scientists conducting research varies throughout the year, from about 1,000 in winter to around 5,000 in summer.Researchers from a variety of scientific backgrounds study the Antarctic not only as a unique environment, but also as an indicator of broader global processes. Their feathers retain a layer of air, helping them keep warm in the freezing water.Cultural GeographyA Culture of ScienceWhile the Antarctic does not have permanent human residents, the region is a busy outpost for a variety of research scientists.

At the continent’s edge, strong katabatic winds off the polar plateau often blow at storm force. East Antarctica is colder than its western counterpart because of its higher elevation. In the dry valleys, the same effect occurs over a rock base, leading to a barren and desiccated landscape.

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Mount Erebus on Ross Island is the world’s southernmost active volcano and erupts around 10 times each day. It was once believed that the lake had been sealed off for millions of years, but scientists now estimate its water is replaced by the slow melting and freezing of ice caps every 13,000 years. The lakes that lie at the base of the continental ice sheet occur mainly in the McMurdo Dry Valleys or various oases.

It emphasizes the importance of understanding the vital role of Antarctica and the Southern Ocean in climate and weather to improve current knowledge and inform management responses. The global climate system was highlighted as one of the main priorities that will be supported and studied through the AAP Strategy Plan. It consists of around 5,500 digital optical modules, some of which reach a depth of 2,450 m (8,040 ft), that are held in 1 km3 (0.24 cu mi) of ice.

The first child born in the southern polar region was a Norwegian girl, Solveig Gunbjørg Jacobsen, born in Grytviken on 8 October 1913. Some of the research stations are staffed year-round, the winter-over personnel typically arriving from their home countries for a one-year assignment. The first semi-permanent inhabitants of regions near Antarctica (areas situated south of the Antarctic Convergence) were British and American sealers who used to spend a year or more on South Georgia, from 1786 onward. The existence of life there is thought to strengthen the argument for the possibility of life on Jupiter’s moon Europa, which may have water beneath its water-ice crust. Even sea ice can harbour unique ecological communities, as it expels all salt from the water when it freezes, which accumulates into pockets of brine that also harbour dormant microorganisms. Smaller forms of life, such as sea cucumbers and free-swimming snails, are also found in both polar oceans.

The ice shelves of Antarctica were probably first seen in 1820, during a Russian expedition led by Fabian Gottlieb von Bellingshausen and Mikhail Lazarev. It is mainly a polar desert, with annual precipitation of over 200 mm (8 in) along the coast and far less inland. Antarctica is the fifth-largest continent, being about 40% larger than Europe, and has an area of 14,200,000 km2 (5,500,000 sq mi).

Often described as a continent of superlatives, Antarctica is not only the world’s southernmost continent. Antarctica, the world’s southernmost and fifth largest continent. Antarctica had a temperature recorded at −128.6 °F (−89.2 °C) on the high inland ice sheet, measured at Vostok Station on July 21, 1983.

Early penetration of this Southern Ocean in the search for fur seals led in 1820 to the discovery of the continent. The ice-choked and stormy seas around Antarctica long hindered exploration by wooden-hulled ships. Advances in radar technology since then have resulted in airborne radio-echo sounding systems that can measure ice-thickness, which has enabled scientific teams to make systematic remote surveys of ice-buried terrains.