Scientific research collaboration efforts for Greenland ice core studies 

Memoirs of National Institute of Polar Research, Special Issue, No. 51, p. 337-342, 1996 

H.B. Clausen and N.S. Gundestrup
Geofysisk Afdeling, Niels Bohr Instituttet for Astronomi, Fysik og Geofysik, Københavns Universitet
H. Shoji
Kitami Institute of Technology, 165, Koen-cho, Kitami 090, Japan.
O. Watanabe
National Institute of Polar Research, 9-10, Kaga 1-chome, Itabashi-ku, Tokyo 173, Japan.

In the central parts of the polar ice caps, the yearly precipitation in the form of snow is piled on top of the precipitation of the previous year. These snow layers are not subject to any disturbances like e.g. melting and run-off. The snow, which is compressed to glacier ice by the burden of the overlaid snow, contains a multitude of information of past environmental conditions sucs as temperature, rate of accumulation and volcanism. In vertically drilled ice cores from the polar regions, this information can be obtained by various techniques of analysis. Since 1989, glaciological research collaboration has been established in the field of ice core drilling between Japan and Denmark. The collaboration includes the fields of logistics, ice core drill development and science performed on the recovered ice cores.