Greenland ice core dating
And although data showed heavy-metal pollution in the North Atlantic sector of the Arctic is substantially lower today than a century ago, Mc Connell and his research partner, Ross Edwards, an associate research professor at DRI, said there is still cause for concern.
"Contamination of other sectors may be increasing because of the rapid coal-driven growth of Asian economies," they wrote in the report.
The Arctic amplification phenomenon refers to the faster rate of warming in the Arctic compared to places farther south.
Arctic amplification has been linked to a spike in the number of persistent ...
He said that it didn't but that the weight of the ice actually depressed the land. At any rate, he talked about the seasonal layers in the ice.
These layers can be counted only so far down because the weight of the ice compresses the layers more and more the deeper they are in the ice.
At any rate, the main challenge I am aware of to standard ice core dating has to do with the fact that we really don't know if layers before known time were caused by many different storms in a few years or one season layering a year.
We know what we see now, and many extrapolate backwards from that.
The study was conducted by the Desert Research Institute (DRI), Reno, Nev.
I spent a year in Greenland (Thule) and went up onto the cap a few times.
While there I had the opportunity to talk to a team of scientists who were loading supplies in order to head back out onto the cap. They said that they were working in an area where the ice was about 9,000 ft. I mentioned that I was amazed that the ice went up that far.
and partially funded by the National Science Foundation.
Detailed measurements from a Greenland ice core showed pollutants from burning coal--the toxic heavy metals cadmium, thallium and lead--were much higher than expected.