Ice caps tell about the age of the ice

Greenland's ice cap loses mass in connection with the warming that has been over the last 20 years. There is much uncertainty in the prognosis of how mass loss will be in the future especially because the many ice streams do not behave in a predictable manner.

The deep ice caps through the Greenland ice cap contain a lot of information about previous hot climate periods. By studying the heat of the past, we can learn about the mass loss of ice cream in hot climate periods and it can improve our knowledge and bring uncertainty to the forecasts for sea level changes in the future.

Over the years 2008-2011 an international research team has drilled a 2538 m deep ice-cubes through the Indlandisen at NEEM in northern Greenland (77.5 N, 51W). The camp is built to house up to 40 researchers and will be packed together after the project ends. The ice cream drill itself takes place in a hall that has been dug beneath the surface.

Measurements on the ice sheet have taught us a lot about the climate of the past. We see how natural climate variations have been both through our current mid-Ice age, which has lasted for 11,700 years and through the last ice age that began 115,000 years ago. Especially exciting is the brand new information we get from the deepest ice of the ice cream: ice from the previous between the Ice age, which we call the Eem time. During this period, there were 5 degrees warmer in Greenland so climate information from this period can be told us about conditions during a warmer period – one that we expect in the future when global warming strikes through.

Connect we drilled down to the bottom and at NEEM and got a large amount of black bottom material up in the last ice cores. Material from scratch can teach us about how long the ice has covered Greenland.

The results of NEEM are composed with the results of the other deep ice caps from Greenland and our best bet for what will happen in the future will be presented.

Info box:

Ice caps tell about the age of the ice

Date: 8. Feb 2016
Time: 19:30:00

Lecturer: Professor Dorthe Dahl-Jensen
Institution: Ice and climate, Niels Bohr Institutet, KU

The Lecture is held: Geological Museum