abstract
A study was made of 10 m firn temperatures to find the influence of altitude on the mean annual surface temperature and to demarcate the different facies on the ice-sheet. A lapse rate of 0,434°C/100 m was found for the part of the ice sheet above the saturation line at 320 m. From 320 m down to about 50 m a marked deviation between the 10 m firn temperatures and mean annual surface temperatures was observed. This is explained by surface melting and downward transfer of heat at these lower altitudes. The moraines at Grunehogna, Ovenuten and Jekselen are regarded as typical shear moraines. Other possible modes of formation are briefly discussed. Crevasse-patterns at Grunehogna were studied and are discussed in the text.
