Absolutely cool! (Bad pun,but this really is impressive.)
I think it most impressive that they’ve needed four decades to develop techniques they knew must exist. It is good to remember that real science is hard and often quite slow.

Watts Up With That?

Here’s something useful that works like radiocarbon dating, but on ice. Since it is cosmic ray based, it makes me wonder if it could be used to reconstruct the cosmic ray record to test Svensmark’s theory of cosmic ray modulation of climate. How it works (graphic from Argonne National Laboratory):

Kr is a cosmogenic isotope produced in the upper atmosphere. Its analysis allows age determination for:

  • dating polar ice to study the climate history of the Earth, and
  • dating old groundwater to study the source, sink, and flow pattern of aquifers.

The applicable age range of 100 kyr – 1 Myr  is beyond the reach of 14C-dating.

From Oregon State University   CORVALLIS, Ore. – A team of scientists has successfully identified the age of 120,000-year-old Antarctic ice using radiometric krypton dating – a new technique that may allow them to locate and date ice that is more than…

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