What would Antarctica look like if all its ice melted

Have you ever wondered what would Antarctica look like if all its ice melted? This may seem extraordinary and unlikely, but, this has actually happened in the past. In fact, there have been no major ice sheets over the South Pole for most of the Earth’s history.

In the video below, NASA Goddard strip away Antarctic ice to reveal a new, and much more detailed map of the bedrock below. This map, called Bedmap2, was compiled by the British Antarctic Survey and incorporates millions of new measurements, including substantial data sets from NASA’s ICESat satellite and an airborne mission called Operation IceBridge.

The video above is public domain and can be downloaded from NASA web site.

Here are some Antarctica Facts

  1. Antarctica is the coldest continent. The coldest temperature ever recorded on Earth was -89.2 °C (-128 °F) on July 21, 1983 (during the Antarctic winter), at Antarctica’s Vostok station.
  2. Antarctica is the driest continent. It is extremely dry, technically a desert, averaging 166 mm (6.5 in) of precipitation per year. The driest place on Earth is also in Antarctica – it is called McMurdo Dry Valleys. The Friis Hills in Taylor Valley, one of the McMurdo Dry Valleys haven’t seen water in 14 million years. (Source)
  3. There is a permanent research station in the McMurdo Dry Valleys (built by the United States in 1956). If you stay there in winter, your wisdom teeth and appendix have to be removed, even if they are perfectly healthy. During the Antarctic winter (from March to the end of September) McMurdo is completely isolated – so you can’t be evacuated. They couldn’t be operated on at the station, either. (Source)

    Wright Valley, McMurdo Dry Valleys, Antarctica - from the Bull Pass
    Wright Valley, McMurdo Dry Valleys, Antarctica – from the Bull Pass
  4. Why your appendix appendix have to be removed, here is the story behind: the photo below, captured in 1961, documents probably the most famous appendectomy in the world, performed by Dr Leonid Rogozov (4 March 1934 – 21 September 2000), the Soviet general practitioner who took part in the sixth Soviet Antarctic Expedition in 1960–1961. He was stationed in Antarctica as the only doctor on the team, and couldn’t be evacuated when he developed appendicitis. He enlisted a meteorologist and a driver to hold tools and mirrors while he braved the procedure himself through waves of pain and nausea. But it went well, and Rogozov made a full recovery.
    Dr. Leonid Rogozov applies self surgery in Antarctica
    On the morning of 29 April 1961, Rogozov experienced general weakness, nausea, and moderate fever, and later pain in the lower right portion of the abdomen. None of the possible conservative treatment measures helped. By 30 April signs of localised peritonitis became apparent, and his condition worsened considerably by the evening. Mirny, the nearest Soviet research station, was more than 1,600 km (1,000 mi) from Novolazarevskaya. Antarctic research stations of other countries did not have an aircraft. Severe blizzard conditions prevented aircraft landing in any case. Rogozov had no option but to perform the operation on himself.
    The operation started at 02:00 local time on 1 May with the help of a driver and meteorologist, who were providing instruments and holding a mirror to observe areas not directly visible, while Rogozov was in a semi-reclining position, half-turned to his left side. A solution of 0.5% novocaine was used for local anaesthesia of the abdominal wall. Rogozov made a 10–12 cm incision of the abdominal wall, and while opening the peritoneum he accidentally injured the cecum and had to suture it. Then he proceeded to expose the appendix. According to his report, the appendix was found to have a dark stain at its base, and Rogozov estimated it would have burst within a day. The appendix was resected and antibiotics were applied directly into the peritoneal cavity. General weakness and nausea developed about 30–40 minutes after the start of the operation so that short pauses for rest were repeatedly needed after that. By about 04:00 the operation was complete.
    After the operation gradual improvement occurred in the signs of peritonitis and in the general condition of Rogozov. Body temperature returned to normal after five days, and the stitches were removed seven days after the operation. He resumed his regular duties in about two weeks. The self-surgery captured the imagination of the Soviet public at the time. In 1961 he was awarded the Order of the Red Banner of Labour. The incident resulted in a change of policy, and thereafter, extensive health checks were mandatory for personnel to be deployed on such expeditions. Source: wikipedia

  5. 98% of Antarctica is covered by ice. With an average thickness of about 1 mile (1.6 kilometers), the Antarctic Ice Sheet is also the largest single mass of ice on Earth. But, unfortunately, due to the global warming, Antarctica lost about 125 gigatons of ice per year between 2002-2016, causing global sea level to rise by 0.35 millimeters per year. In the video below, data from the GRACE satellites show. Orange and red shades indicate areas that lost ice mass, while light blue shades indicate areas that gained ice mass. White indicates areas where there has been very little or no change in ice mass since 2002. In general, areas near the center of Antarctica experienced small amounts of positive or negative change, while the West Antarctic Ice Sheet experienced a significant ice mass loss (dark red) over the fourteen-year period. Floating ice shelves whose mass GRACE doesn’t measure are colored gray.If all the ice of Antarctica melted, ocean levels would rise about 60 meters (200 feet), drowning many coastal cities around the world.

  6. Antarctica is the windiest continent. Winds in some place like McMurdo Dry Valleys can reach 320 km/h (200 mph).
  7.  It also has the highest average elevation of all the continents: 8,200 ft (2500 m).
  8. The existence of Antarctica was completely unknown until 1820, it was considered to be just a group of islands.See notes 1
  9. Antarctica is the fifth largest continent. At 14,000,000 square kilometers (5,400,000 square miles), it is larger than Europe (10,180,000 km2/3,930,000 sq mi) and Australia (7,692,024 km2/2,969,907 sq mi).

    Antarctica (orthographic projection)
    Antarctica (orthographic projection). For comparison, Antarctica is nearly twice the size of Australia. About 98% of Antarctica is covered by ice that averages 1.9 km (1.2 mi; 6,200 ft) in thickness, which extends to all but the northernmost reaches of the Antarctic Peninsula. Image Source: wikipedia
  10. There are sand dunes. The largest recorded one was 70 meters (230 feet) high and more than 200 meters (650 feet) wide, and was located in the McMurdo Dry Valleys.
  11. Antarctica holds approximately 70% of all fresh water on Earth, and 90% of the planet’s freshwater ice.
  12. At 4,892 meters (16,050 ft) above sea level, Mount Vinson is the highest peak in Antarctica.
  13. At 3,500 km (2,200 mi), the Transantarctic Mountains which divide the continent into East and West sections is the fourth longest mountain range on Earth (Andes is the longest at 7,000 km / 4,350 mi). The higest peak of this mountain range is Mount Kirkpatrick, with an elevation of 4,528 m (14,856 ft).
  14. The first expedition to reach the geographic South Pole was led by the Norwegian explorer Roald Amundsen. He and four others arrived at the pole on 14 December 1911, five weeks ahead of a British party led by Robert Falcon Scott as part of the Terra Nova Expedition.

    Roald Amundsen and his team at South Pole
    Roald Amundsen, Helmer Hanssen, Sverre Hassel and Oscar Wisting (l–r) at “Polheim”, the tent erected at the South Pole on 16 December 1911. The top flag is the Flag of Norway; the bottom is marked “Fram”, the name of the polar exploration ship. Photograph by Olav Bjaaland, one of the first five men to reach the South Pole as part of Amundsen’s South Pole expedition.
  15. There are about 400 known subglacial lakes in Antarctica, the biggest one being Lake Vostok. It is beneath Russia’s Vostok Station, which is at 3,488 m (11,444 ft) above mean sea level. The surface of this fresh water lake is approximately 4,000 m (13,100 ft) under the surface of the ice, which places it at approximately 500 m (1,600 ft) below sea level.Measuring 250 km (160 mi) long by 50 km (30 mi) wide at its widest point, and covering an area of 12,500 km2 (4,830 sq mi) and an average depth of 432 m (1,417 ft), it has an estimated volume of 5,400 km3 (1,300 cu mi) – making it the sixth largest freshwater lake on Earth by volume (the largest is Lake Baikal).
  16. There is a giant trench under Antarctic ice which is deeper than Grand Canyon. It is up to 3 kilometers (1.9 miles) deep and more than 25 kilometers (15.5 miles) across. For comparison, the Grand Canyon is 1.8 kilometers (1.13 miles) deep at its deepest point. The floor of the subglacial valley is more than 6,500 feet (2,000 meters) below sea level at some points.
  17. There are also volcanos! Mount Sidley is the highest volcano, with a summit elevation of 4,181–4,285 metres (13,717–14,058 ft), and Mount Erebus is the second-highest volcano and the southernmost active volcano on Earth (last erupted in 2015).
  18. Most of the continent is completely dark during the region’s winter months (when summer in the northern hemisphere). But, During the summer months, the sun is constantly above the horizon. So, more sunlight reaches the surface at the South Pole than over a similar period of time at the equator.
  19. The male Emperor penguin is the only warm-blooded animal that remains on the Antarctic continent through the winter. Emperor penguin is the only penguin species that breeds during the Antarctic winter. The female lays a single egg, which is incubated by the male while the female returns to the sea to feed.

    Emperor penguin family
    The emperor penguin (Aptenodytes forsteri) is endemic to Antarctica. Reaching 130 cm (51 in) in height and weighing from 22 to 45 kg (49 to 99 lb), it is the tallest and heaviest of all living penguin species. The male and female emperor penguins are similar in plumage and size. Photo: Emperor penguin adults and a juvenile on Snow Hill Island, Antarctica (wikipedia).
  20. There are no polar bears living in Antarctica, they live in Arctic.
  21. Antarctica’s soil has the lowest habitat diversity on Earth, since the continent is technically an icy desert, with extremely low temperatures, high solar radiation, and extreme dryness. There are relatively mild conditions on the Antarctic Peninsula and the subantarctic islands, which have warmer temperatures and more liquid water. So, the Peninsula and the islands are far more habitable, some areas of the peninsula can receive 900 millimeters (35.43 in) of precipitation a year, including rain, and the northern Peninsula is the only area on the mainland where temperatures are expected to go above 0 °C (32 °F) in summer. The subantarctic islands have a milder temperature and more water, and so are more favorable for life.
  22. There are no trees in Antarctica. But, about 53 million years ago, during the early Eocene period, when Antarctic winter temperatures exceeded 10°C, while summers may have reached 25°C, palm trees grew on the continent. Fossil plants show that the continent was once covered in lush green forests and was also home to the dinosaurs. Today, Subantarctic flora is dominated by the coastal tussock grass, that can grow up to 2 meters (7 ft). Only two flowering plants inhabit continental Antarctica, the Antarctic hair grass (Deschampsia antarctica) and the Antarctic pearlwort (Colobanthus quitensis). Both are found only on the western edge of the Antarctic Peninsula and on two nearby island groups, the South Orkney Islands and the South Shetland Islands.
  23. Over 1000 fungi species have been found on and around Antarctica.
  24. Antarctica (naturally) contains every timezone on the planet.
  25. The most saline water body in the world is the Don Juan Pond, located in the McMurdo Dry Valleys. Its volume is some 3,000 cubic meters, but is constantly changing. It is claimed that Don Juan Pond is over 18 times the ocean’s salinity and 1.3 times that of the Dead Sea. Its high salinity prevents the Don Juan from freezing even when temperatures are below −50 °C (−58 °F). In fact, it is only one of the Antarctic hypersaline lakes that almost never freezes even during the winter months.
  26. The best meteorites are found in Antarctica. Meteorites fall everywhere on Earth with equal probability, but in Antarctica, they can be found easily (black rock on the white ice) and largely undisturbed by the natural processes. The Antarctic Meteorite Program is a cooperative agreement between three agencies: the National Science Foundation, NASA and the Smithsonian Institution – providing for the collection, curation, distribution, and long-term storage of meteorites recovered during annual U.S. expeditions to Antarctica.

    Meteorite on- Antarctic ice
    Meteorite on blue ice found by the ANSMET 2012-2013 recon team (Image: Antarctic Search for Meteorites Program / Katherine Joy)
  27. There is a blood red waterfall in Antarctica, named “Blood Falls”. It is an outflow of an iron oxide-tainted plume of saltwater, flowing from the tongue of Taylor Glacier onto the ice-covered surface of West Lake Bonney in the Taylor Valley of the McMurdo Dry Valleys in Victoria Land, East Antarctica.

    Blood Falls, Antarctica
    Blood Falls in 2006. It is an outflow of an iron oxide-tainted plume of saltwater, flowing from the tongue of Taylor Glacier onto the ice-covered surface of West Lake Bonney in the Taylor Valley of the McMurdo Dry Valleys in Victoria Land, East Antarctica.
    Iron-rich hypersaline water sporadically emerges from small fissures in the ice cascades. The saltwater source is a subglacial pool of unknown size overlain by about 400 meters (1,300 ft) of ice several kilometers from its tiny outlet at Blood Falls.
    The reddish deposit was found in 1911 by the Australian geologist Griffith Taylor, who first explored the valley that bears his name. The Antarctica pioneers first attributed the red color to red algae, but later it was proven to be due to iron oxides. Image: Peter Rejcek
  28. The Antarctic Treaty dedicates the continent to peaceful research activities. It was signed on December 1, 1959, after more than a year of secret negotiations by 12 countries. As of 2017, ‎there are 53 states party to the treaty. Today, nearly 30 countries operate more than 80 research stations around the continent.
  29. There are between around 1000 (during winter) – 4,000 (during summer) researchers in Antarctica. Apart from that, there are no indigenous populations. It is completely inhabited.
  30. Born in Fortín Sargento Cabral at the Esperanza Base, near the tip of the Antarctic Peninsula on 7 January 1978, Emilio Marcos Palma, an Argentine man, is known for being the first documented person born on the continent of Antarctica.
  31. It is also a tourist site. According to the International Association of Antarctica Tour Operators (IAATO), around 25,000-30,000 tourists visit the Antarctic Peninsula every year.
  32. Antarctica has its own domain extension: .aq
  33. There was a nuclear reactor in Antarctica from 1964 to 1972. It was a medium-sized, portable nuclear reactor installed at McMurdo Station, and was the first and only to operate on the Antarctic continent. It operated for 10 years and greatly reduced the need for fossil fuels in the Antarctic. But, during its operational lifetime, there were total of 438 malfunctions. Because of being an unreliable source of power generation, available only 72% of the time, in May of 1972, it was determined and replaced with more reliable modern diesel-electric generators.
  34. There is a Fire Department on Antarctica, which is based at McMurdo Station. It is the only full time professional fire department in Antarctica, and the largest and best equipped.
  35. The world’s southernmost bar is in Antarctica, at Vernadsky Research Base.
  36. According to a new NASA study, Antarctica is overall accumulating ice, still. The study says that an increase in Antarctic snow accumulation that began 10,000 years ago is currently adding enough ice to the continent to outweigh the increased losses from its thinning glaciers. The research challenges the conclusions of other studies, including the Intergovernmental Panel on Climate Change’s (IPCC) 2013 report, which says that Antarctica is overall losing land ice. According to the new analysis of satellite data, the Antarctic ice sheet showed a net gain of 112 billion tons of ice a year from 1992 to 2001. That net gain slowed to 82 billion tons of ice per year between 2003 and 2008. But it might only take a few decades for Antarctica’s growth to reverse. If the losses of the Antarctic Peninsula and parts of West Antarctica continue to increase at the same rate they’ve been increasing for the last two decades, the losses will catch up with the long-term gain in East Antarctica in 20 or 30 years.
Antarctica
Antarctica is Earth’s southernmost continent. It contains the geographic South Pole and is situated in the Antarctic region of the Southern Hemisphere, almost entirely south of the Antarctic Circle, and is surrounded by the Southern Ocean. At 14,000,000 square kilometers (5,400,000 square miles), it is the fifth-largest continent. For comparison, Antarctica is nearly twice the size of Australia. About 98% of Antarctica is covered by ice that averages 1.9 km (1.2 mi; 6,200 ft) in thickness, which extends to all but the northernmost reaches of the Antarctic Peninsula.
Antarctica, on average, is the coldest, driest, and windiest continent, and has the highest average elevation of all the continents. Antarctica is a desert, with annual precipitation of only 200 mm (8 in) along the coast and far less inland. The temperature in Antarctica has reached −89.2 °C (−128.6 °F), though the average for the third quarter (the coldest part of the year) is −63 °C (−81 °F). Image: The Planet D

Notes

  1. In the Western world, belief in a Cold Land—a vast continent located in the far south of the globe to “balance” out the northern lands of Europe, Asia and North Africa—had existed for centuries. For example, Aristotle had postulated a symmetry of the earth, which meant that there would be equally habitable lands south of the known world.

Sources

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