results indicate the effect of salinity variations in the ice sheet on the apparent 

 resistivity values. As electrode spacing is increased, the distribution of electric 

 current spreads vertically dovs'nvirard into the ice sheet and to the water beneath 

 the ice. The low resistivity value with a minimum electrode separation of 7.62 

 cm (3 inches) indicates the high salinity content of the ice at or near the surface. 

 The apparent resistivity calculations indicate a maximum value at an electrode 

 spacing of approximately 60.9 cm (2 feet). As electrode separation is increased 

 beyond 60.9 cm (2 feet), the apparent resistivity falls off rapidly, indicating the 

 shunting effect of the sea water path of higher conductivity. The measurements 

 were taken within a temperature range of — 5°C to — 2°C. Because of the short 

 period of time in which field measurements could be made, it was impossible to 

 obtain a more complete temperature-resistivity profile. In comparing the data 

 obtained with the results of a more complete study of another group,*** it appears 

 that the measurements are reasonably consistent with those of the other group 

 within a temperature range common to the results of each group. 



22 



