COPENHAGEN, Denmark, Sept. 21 (UPI) — A team of Danish, Canadian and Russian scientists say they have used ice cores to determine and analyze the Greenland ice cap’s 11,700-year evolution.
Bo Vinther at the Niels Bohr Institute’s Center for Ice and Climate at the University of Copenhagen and colleagues said they wanted to establish the stability of the ice cap.
By analyzing every annual layer in the miles-long ice cores, the researchers found an entirely new way of interpreting the information from the ice core drillings.
“Ice cores from different drillings show different climate histories,” Vinther said. “This could be because they were drilled at very different places on and near Greenland, but it could also be due to changes in the elevation of the ice sheet, because the elevation itself causes different temperatures.
The researchers said they determined the evolution of the ice sheet shows it is very sensitive to temperature variations. The results, said the scientists, can be used to make new calculations for models predicting future consequences of climate changes.
The study was reported in the journal Nature.
Copyright 2009 by United Press International