Topic: Seawater

NASA Scientists discover Ancient Bacteria existing deep within Antarctic Lake Vida

December 1, 2012 |

Written by Dr. Tony Phillips
Science at NASA

Washington, D.C. – Nearly 65 feet beneath the icy surface of a remote Antarctic lake, scientists from NASA, the Desert Research Institute (DRI) in Reno, NV, the University of Illinois at Chicago, and nine other institutions, have uncovered a community of bacteria existing in one of Earth’s darkest, saltiest and coldest habitats.

Lake Vida, the largest of several unique lakes found in the McMurdo Dry Valleys, contains no oxygen, is mostly frozen and possesses the highest nitrous oxide levels of any natural water body on Earth.

Scanning electron micrograph of very small and numerous bacterial cells inhabiting icy brine channels in Antarctica’s Lake Vida, which lies in the Victoria Valley, one of the northernmost of the Antarctic dry valleys. (Credit: Christian H. Fritsen, Desert Research Institute)

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NASA uses direct Satellite Observations to examine Ice Increases in the Antarctic Sea

November 19, 2012 |

Written by Alan Buis and Whitney Clavin
NASA’s Jet Propulsion Laboratory

Pasadena, CA – NASA and British Antarctic Survey scientists have reported the first direct evidence that marked changes to Antarctic sea ice drift caused by changing winds are responsible for observed increases in Antarctic sea ice cover in the past two decades.

The results help explain why, unlike the dramatic sea ice losses being reported in the Arctic, Antarctic sea ice cover has increased under the effects of climate change.

View of Sheldon Glacier with Mount Barre in the background, seen from Ryder Bay near Rothera Research Station, Adelaide Island, Antarctica. A new NASA/British Antarctic Survey study examines why Antarctic sea ice cover has increased under the effects of climate change over the past two decades.

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