Bore-hole survey at Camp Century, 1989 

Cold Regions Science and Technology, Vol. 21, p. 187-193, 1993 

N.S. Gundestrup and D. Dahl-Jensen
Geofysisk Afdeling, Niels Bohr Instituttet for Astronomi, Fysik og Geofysik, Københavns Universitet
B.L. Hansen
Snow and ice Research Group, University of Nebraska, Lincoln, NE 68588-0640, USA.
J. Kelty
Physics and Astronomy, University of Nebraska, Lincoln, NE 68588-0111, USA.

A combination of the directional surveys of the Camp Century borehole from 1966, 1967, 1969 and 1989 has revealed a deformation pattern similar to that measured at Dye-3, South Greenland and Byrd Station, Antarctica showing high deformation rate for Wisconsin ice. Compared to the Dye-3 profile, the deformation shows the same pattern even in details. The surface velocity obtained by integrating the bore hole deformation is in agrement with that obtained from satellite measurements.