- Jan 24, 2011
Slash Gear said:In what is a profound visual display of the earth’s increasingly warmer temperatures, glacial ice in the Andes that took a minimum of 1600 years to form have melted drastically in a mere 25 years, leaving behind a large pool of water framed by exposed rock and dimished beds of ice. As the ice melts, plants from thousands of years ago are being freed.
As the ice melts, plants that were trapped within it are exposed, and it is those very materials that are being used to analyze the glacial area’s history. Such a project has been undertaken by Ohio State University’s glaciologist Lonnie G. Thompson, who – along with his team – has published the results of their work on the Peruvian ice sheets known as the Quelccaya ice cap.
The timespan for the formation of the ice was determined by carbon dating the plants that have been exposed as the ice melts. The carbon being dated has a known decay rate and provides fairly exact data in return. In addition to the carbon dating, Thompson and team have published information on chemical tracers from ice pulled from the depths of the ice cap via drills.
Read more: http://www.slashgear.com/warming-temperatures-melt-1600-years-worth-of-ice-in-25-years-06276718/