Ice core
Videos
An ice core is a core sample that is typically removed from an ice sheet or a high mountain glacier. Since the ice forms from the incremental buildup of annual layers of snow, lower layers are older t
Ice core sample taken from drill
Mechanical drill head, showing cutting teeth
Sawing the GRIP core
Bubbles in an Antarctic ice sample. Illuminated with polarised light
Dye 3
Videos
Dye 3 is an ice core site and previously part of the DYE section of the Distant Early Warning line, located at in Greenland. As a DEW line base, it was disbanded in years 1990/1991.
Ice core
…ocean where the moisture originated. Since then it has been customary to measure both. Water isotope records, analyzed in cores from Camp Century and Dye 3 in Greenland, were instrumental in the discovery of Dansgaard-Oeschger events—rapid warming at the onset of an interglacial, followed by slower cooling…
Dye 3 circa early 1980s.
Satellite composite image of Greenland.
Photograph of a section of the GISP2 ice core from 1837 m depth with clearly visible annual layers. The white bands are considered from summer snow and the clear bands from winter snow.