The GRIP deep drilling camp 

Memoirs of National Institute of Polar Research, 49, p. 358-370, 1994. 

N.S. Gundestrup and J.P. Steffensen
Geofysisk Afdeling, Niels Bohr Instituttet for Astronomi, Fysik og Geofysik, Københavns Universitet
J. Schwander

In order to support the GRIP deep drilling, a permanent camp was erected on top of the Greenland ice sheet at an elevation of more than 3 km, 800 km away from the nearest airport. Day temperatures reached a maximum of -10 C, with typical night temperatures of -30 C. Although the camp was manned only during the three summer months, it was designed to sustain winter temperatures of -60 C. The camp was designed to accommodate 30 people (although the number of inhabitants at times was up to 50), and to include everything needed for the operation, including a 3 km long sldway. The designed lifetime of the camp was 3 years, corresponding to 4 field seasons.