Though the North Pole has quite a reputation during the holidays, the South Pole is always a hive of activity, as scientists at the Amundsen-Scott South Pole Station investigate everything from the origins of the universe to pollutants in the atmosphere.
Since 1956, the U.S. has maintained an uninterrupted presence at the planet’s southernmost point. Today, the National Science Foundation (NSF) funds and manages the U.S. Antarctic Program (USAP). The Amundsen-Scott South Pole Station, or simply the South Pole Station, is one of three stations NSF operates under USAP. It is located at the geographic South Pole, 90 degrees south latitude.
The Aurora Australis, pictured here, dances above the South Pole Station. Auroras are caused by the excitation of charged particles in the upper atmosphere as solar winds travel along Earth’s magnetic field.
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The station sits atop a continental ice sheet more than 1 mile thick that slides toward the sea at a rate of 33 feet every year. It can house more than 100 people above ground at a time, while fuel and cargo storage, waste-management facilities, maintenance garages and a power plant are all located beneath the surface of the ice sheet.
Thanks to the dry, clear atmosphere at the South Pole, SPT is better able to “look” at the cosmic microwave background — the thermal radiation left over from the Big Bang — and map out the location of galaxy clusters, which are hundreds to thousands of galaxies that are bound together gravitationally and among the largest objects in the universe. With a better understanding of clusters, astronomers can probe the nature of other cosmic mysteries, such as dark matter and dark energy.
NSF’s Atmospheric Research Observatory (ARO) at South Pole Station serves as one of the sites of a long-term, global atmospheric monitoring and research program maintained by NOAA. ARO scientists monitor a range of atmospheric phenomena, from the influence of gases and aerosols on Earth's climate to the impact of pollutants in the atmosphere.
IceCube captures fleeting bursts of light when tiny neutrinos — one of the fundamental particles that make up the universe — crash into the atomic nuclei of water molecules in ice, causing an eruption of subatomic particles. Built into the ice sheet, the main IceCube detector consists of 5,160 sensors installed inside of 86 holes drilled into the ice.
The electrically neutral neutrino is able to travel great distances through space unhindered by stars, planets and powerful magnetic fields. In this way, it remains virtually pristine and could hold valuable clues about the origins of the universe.
When neutrinos pass through ultra-clear-blue ice, the collision produces a particle—called a muon—that radiates blue light. The DOMs detect this light and send back data, via the internet, to scientists around the world.
Named for the absence of light and radio wave interference, the Dark Sector is home to all of the South Pole’s telescopes. BICEP measures the polarization of the cosmic microwave background and allows scientists to investigate the theory that the universe expanded exponentially in the fraction of a second directly following the Big Bang.
Ice cores taken from the South Pole tell a story about Earth’s ancient atmosphere. Through the NSF-funded South Pole Ice Core (SPICECore) project, researchers drill deep into the ice to extract ice cores. During the research season, SPICECore researchers may drill for 24 hours a day and collect samples of ice from as deep as 5,744 feet.
In addition, 8 inches of snow accumulate but never melt each year, placing particular stress on South Pole facilities and other structures. The station’s aerodynamic design and elevated construction helps to minimize snow build up. The 65,000-square-foot building also sits atop 36 hydraulic columns, which can raise the entire structure in 25-centimeter increments, extending the life of the station.
From the first station constructed at the South Pole to today’s Scott South Pole Station, the geographic South Pole has been a hub of scientific investigation for close to 60 years. NSF support and management of the station makes it possible for researchers around the world to carry out their scientific pursuits for the benefit of all mankind at one of the world’s most unique research sites.
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