The Calkin Glacier aurora australis over the Dark Sector at Amundsen-Scott South Pole Station Nacreous clouds These polar stratospheric clouds at 80,000 feet are the highest of all clouds. They only occur in the polar regions when the stratospheric temperature dips below 100 degrees below zero Commonwealth Glacier A balancing stone An aurora over the Elevated Station at Amundsen-Scott South Pole northern edge of the giant iceberg person stands underneath a natural arch in a glacier first glow of sunrise appears above McMurdo Station a field of sastrugi - ridges of snow formed by wind erosion cable portrudes from the ice wall at Explorer's Cover an underwater camera. Connected to onshore equipment and linked by radio to the Internet, photograph of an iceberg titled "Ice Tunnel" |
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