In one of the Cold War's oddest experiments, the U.S. dug a 300-meter-long military base into the ice of northwest Greenland in the early 1960s. But it ended up leaving a lasting, entirely nonmilitary legacy. ScienceMagArchives
In one of the Cold War's oddest experiments, the United States dug a 300-meter-long military base called Camp Century into the ice of northwest Greenland in the early 1960s, powered it with a nuclear reactor, and set out to test the feasibility of shuttling nuclear missiles beneath the ice. A constant struggle against intruding snow doomed the base, which was abandoned in 1966. But Camp Century has left a lasting, entirely nonmilitary legacy: a 1.
That changed late last year. Steffensen and Dorthe Dahl-Jensen, a glaciologist at the University of Copenhagen who has led many large European drilling efforts in Greenland and Antarctica, unearthed 30 glass jars containing the Camp Century core's bottom 3 meters of sediment. This was a rare haul: Only a few drilling efforts have penetrated Greenland's ice to the land beneath.
Christ sent thawed samples to the lab of Eric Steig, a glaciologist at the University of Washington in Seattle, who measured ratios of oxygen isotopes to tease out past temperature. He also sent pieces of frozen muck to Tammy Rittenour, a geologist at Utah State University in Logan who specializes in luminescence dating: blasting rocks with light to dislodge electrons that record when the rocks were last exposed to sunlight.
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