Damon Mcknight
Antarctica is the fifth-largest continent on Earth, covering around 5.5 million square miles (14.2 million square kilometres) and nearly twice the size of Australia. It is home to the geographic South Pole and is situated in the Antarctic region of the Southern Hemisphere, almost entirely south of the Antarctic Circle. About 98% of Antarctica is covered by ice, with an average thickness of 1.9 km (1.2 mi; 6,200 ft). In contrast, Australia, the smallest continent, covers 3 million square miles (7.7 million square kilometres) and is about the size of the contiguous 48 states of America.
| Characteristics | Values |
|---|---|
| Size | Antarctica is the fifth-largest continent, covering 14.2 million square kilometres (5.5 million square miles) including its islands and ice shelves. Without these, Antarctica covers 12.3 million square kilometres (4.8 million square miles). Australia is the sixth-largest country, covering 7.7 million square kilometres (3 million square miles). |
| Ice | Antarctica is covered by ice up to 4 kilometres thick, with an average thickness of 1.9 kilometres. Australia has an average elevation of 330 metres. |
| Population | Antarctica is the least densely populated continent, with 0.00008 people per square kilometre. Australia is a country, and the only continent that is its own country. |
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What You'll Learn
Antarctica is the fifth-largest continent
Antarctica covers more than 14.2 million square kilometres, which is almost double the area of Australia. The continent is largely south of the Antarctic Circle and covers the Earth's South Pole. Antarctica has only two seasons: summer and winter. Each season lasts six months, with six months of daylight in the summer and six months of darkness in the winter. This is caused by the tilt of the Earth's axis in relation to the sun. During the summer, the continent is tilted towards the sun and is in constant sunlight, while in the winter, it is tilted away from the sun, resulting in darkness.
The Antarctic Ice Sheet dominates the region and is the largest single piece of ice on Earth. The ice sheet even extends beyond the continent when snow and ice levels are at their highest. The ice surface grows dramatically in size from about three million square kilometres at the end of summer to about 19 million square kilometres by winter. Antarctica has a number of mountain summits, with some reaching altitudes of over 4,500 metres. The continent's highest point is around 4 kilometres above sea level.
There are over 70 permanent and seasonal research stations on the continent, with scientists taking turns to study the icy environment. The largest station is the United States' McMurdo Station, which is capable of supporting over 1,000 people.
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Australia is the sixth-largest country
Antarctica is a land mass covered in ice up to 4 kilometres thick, with an average thickness of 1.9 kilometres. The continent's ice sheet holds about 90% of the Earth's fresh water, but there is not a drop to drink. The ice sheet extends to all but the northernmost reaches of the Antarctic Peninsula. Antarctica's average elevation is 2,500 metres, while Australia's is only 330 metres.
Australia, officially the Commonwealth of Australia, is a sovereign country comprising the mainland of the Australian continent, the island of Tasmania, and numerous smaller islands. It is the largest country in Oceania. Antarctica, on the other hand, is the southernmost continent, containing the geographic South Pole. It is situated in the Antarctic region of the Southern Hemisphere, almost entirely south of the Antarctic Circle, and is surrounded by the Southern Ocean.
Australia is the only continent that is its own country. It is also the smallest continent. While Antarctica is larger in terms of area, it has a much lower population density of 0.00008 people per square kilometre. Australia's population is expected to reach 26 million by 2026, while Antarctica has no permanent residents, only personnel rotating in and out of research stations.
In conclusion, Australia is the sixth-largest country in the world, but Antarctica is nearly twice its size. Antarctica's massive ice sheet and remote location contribute to its significantly lower population and different geographic characteristics.
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Antarctica is 98% covered in ice
Antarctica is a continent where almost every part of its land mass is covered in ice. This ice is up to 4 kilometres thick, with an average thickness of over 2 kilometres (1.2 miles). The Antarctic ice sheet covers 98% of the continent, or 14 million square kilometres. It is the largest of Earth's two current ice sheets, containing 26.5 million cubic kilometres of ice. This is equivalent to 61% of all fresh water on Earth, or about 90% of the world's fresh water.
The Antarctic ice sheet is divided into the East Antarctic Ice Sheet (EAIS) and the smaller West Antarctic Ice Sheet (WAIS). Some consider the ice cover over the relatively small Antarctic Peninsula to be the third ice sheet in Antarctica. The EAIS is over 10 times larger than the WAIS and located at a higher elevation, making it less vulnerable to climate change. The WAIS, on the other hand, is vulnerable to marine ice sheet instability due to its location deep below sea level.
The Antarctic Peninsula has warmed by 3°C since the middle of the 20th century, and the overall ice loss from West Antarctica is expected to contribute to global sea level rise. By 2100, net ice loss from Antarctica alone is projected to add around 11 centimetres to the global sea level rise. The loss of the West Antarctic ice sheet would take an estimated 500 to 13,000 years, and the isostatic rebound of the land previously covered by the ice sheet would result in an additional 1 metre of sea-level rise over the following millennium.
Despite being covered in ice, Antarctica is the driest continent on Earth, receiving similar amounts of moisture to the world's hot deserts. It is also the windiest continent.
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Antarctica is the driest continent
Antarctica is a vast, unspoiled continent that has challenged explorers and inspired dreamers for centuries. It is a place of beauty and mystery, covered with ice miles deep. Antarctica is nearly one and a half times the size of the USA, twice the size of Australia, and 58 times the size of the UK. It covers about 5.5 million square miles (14 million square kilometres).
The Antarctic continent is a land mass covered with ice up to 4km thick. The highest point is around 4km above sea level. There is little exposed rock. Millions of years ago, Antarctica had heavy vegetation, but today the only plants that grow are very small mosses and lichens. Antarctica's average elevation is 2,500m. In contrast, Australia's average elevation is only 330m.
The Antarctic ice sheet began forming some 14 million years ago. The rocks of the East Antarctica shield are as old as 4 billion years, making them among the oldest known rocks on Earth. Geologists are studying this shield to gain insights into the early geological processes of the Earth's history.
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Antarctica is the windiest continent
Antarctica is about twice the size of Australia. It is the coldest, driest, and windiest continent on Earth. The continent is covered in ice, with little exposed rock. The average elevation of Antarctica is 2,500 meters, while Australia's is only 330 meters. Antarctica's ice sheet holds about 90% of the Earth's fresh water, yet there is not a drop to drink. The amount of moisture that falls on the polar plateau is comparable to the amount that falls in the world's hot deserts, making it the driest continent.
Antarctica is subjected to extreme katabatic winds, which are formed when cold air rushes down from the high polar plateau to the coast. These winds can exceed 100 mph each winter and sometimes even reach 200 mph. The powerful winds are so strong that they often knock down scientific instruments.
The continent's extreme weather conditions have posed challenges for human exploration and habitation. The first confirmed landing on the continent was by a Norwegian team in 1895, and in the early 20th century, several expeditions ventured into its interior. Today, human activities in and around Antarctica include tourism, fishing, and research. During the summer months, about 5,000 people reside at research stations, a number that drops to around 1,000 in the winter.
Despite its remoteness, human activity has significantly impacted Antarctica through pollution, ozone depletion, and climate change. The melting of the West Antarctic ice sheet is a major concern, as it can lead to substantial sea-level rise and affect the Southern Ocean's circulation, impacting the Southern Hemisphere's climate and ocean productivity.
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Frequently asked questions
Yes, Antarctica is nearly twice the size of Australia.
Australia is the world's sixth-largest country by total area, spanning 3 million square miles (7.7 million square kilometres).
Antarctica is the fifth-largest continent, covering 5.5 million square miles (14.2 million square kilometres) in area, including its islands and fringing ice shelves.
Antarctica's average elevation is 2,500 meters, while Australia's average elevation is 330 meters.
Antarctica is the least densely populated continent with 0.00008 people per square kilometre. Australia, on the other hand, is a country with a population of over 25 million people.
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