||Kohshima S, Shiraiwa T, Godoi MA, Kubota K, Takeuchi N and Shinbori K
||Memoirs of National Institute of Polar Research, Special Issue No. 56
||A 45.97 m-deep drilling operation was carried out during November/December 1999 on the accumulation area of Tyndall glacier (50o59'05"S, 73o31'12'W, 1756 m a.s.l.) at the southern end of the Southern Patagonia Icefield. A portable electromechanical drilling system was developed for ice-coring on temperate glaciers which often have aquifers near pore-close off depths. The firn-core obtained was subjected to visual stratigraphic observations and bulk-density measurements. Preliminary results suggest an extremely high accumulation rate (about 12-14 m a-1 w.e.) at the drilling site. The drilling operation was strenuous because of the continuous strong wind and enormous snowfall which forced the members to survive for nearly three weeks in a snow cave before evacuation.