Radioactive dating in antarctica
"The only problem is that there isn't a lot of krypton in the air, and thus there isn't much in the ice, either.
That's why we need such large samples to melt down." The group at Argonne is continually improving the ATTA detector, researchers there say, and they aim to perform analysis on an ice sample as small as 20 kilograms in the near future.
The ability to discover ancient ice is critical, the researchers say, because it will allow them to reconstruct the climate much farther back into Earth's history and potentially understand the mechanisms that have triggered the planet to shift into and out of ice ages.
The reason for the rebound is that, relieved from the weight of ...
Scientists using ice-penetrating radar have created 3-D maps of the age of the ice within the Greenland Ice Sheet.
The new atom counter, named Atom Trap Trace Analysis, or ATTA, was developed by a team of nuclear physicists led by Zheng-Tian Lu at Argonne National Laboratory near Chicago.
In their experiment at Taylor Glacier in Antarctica, the researchers put several 300-kilogram (about 660 pounds) chunks of ice into a container and melted it to release the air from the bubbles, which was then stored in flasks.