[1] As a student in 1980, Dahl-Jensen took part in ice-core drilling at the Dye 3 site on the Greenland ice sheet, a project led by Willi Dansgaard.
[5] Dahl-Jensen led the North Greenland Eemian Ice Drilling (NEEM) project: a 14-nation research team which spent four years drilling and analysing a 2,540 m (8,330 ft) ice core reaching back to the last interglacial period 130–113 thousand years BP, the results of which were published in the journal Nature in 2013.
In 2015, a collaborative group of researchers from the U.S., Germany, and Denmark will study Renland, Greenland area for deep ice core drilling.
This could give details on what to expect for future sea level rise due to ice sheet mass loss in Greenland.
It could halt the Gulf Stream ocean current, with potential knock-on effects on the Amazon rainforest and tropical monsoons.